Clear development flag for 4.7.0 release

add JSON support

.ci/travis-build.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+set -e -x
+
+make -j2 $EXTRA
+
+if [ "$TEST" != "NO" ]
+then
+  make -j2 tapfiles
+  make -j2 -s test-results
+fi

.ci/travis-prepare.sh

@@ -0,0 +1,111 @@
+#!/bin/sh
+set -e -x
+
+CURDIR="$PWD"
+
+cat << EOF > $CURDIR/configure/RELEASE.local
+EPICS_BASE=$HOME/.source/epics-base
+EOF
+
+install -d "$HOME/.source"
+cd "$HOME/.source"
+
+add_gh_flat() {
+  MODULE=$1
+  REPOOWNER=$2
+  REPONAME=$3
+  BRANCH=$4
+  MODULE_UC=$(echo $MODULE | tr 'a-z' 'A-Z')
+  ( git clone --quiet --depth 5 --branch $BRANCH https://github.com/$REPOOWNER/$REPONAME.git $MODULE && \
+  cd $MODULE && git log -n1 )
+  cat < $CURDIR/configure/RELEASE.local > $MODULE/configure/RELEASE.local
+  cat << EOF >> $CURDIR/configure/RELEASE.local
+${MODULE_UC}=$HOME/.source/$MODULE
+EOF
+}
+
+# not recursive
+git clone --quiet --depth 5 --branch "$BRBASE" https://github.com/${REPOBASE:-epics-base}/epics-base.git epics-base
+(cd epics-base && git log -n1 )
+add_gh_flat pvData ${REPOPVD:-epics-base} pvDataCPP ${BRPVD:-master}
+add_gh_flat pvAccess ${REPOPVA:-epics-base} pvAccessCPP ${BRPVA:-master}
+add_gh_flat normativeTypes ${REPONT:-epics-base} normativeTypesCPP ${BRNT:-master}
+
+if [ -e $CURDIR/configure/RELEASE.local ]
+then
+  cat $CURDIR/configure/RELEASE.local
+fi
+
+EPICS_HOST_ARCH=`sh epics-base/startup/EpicsHostArch`
+
+# requires wine and g++-mingw-w64-i686
+if [ "$WINE" = "32" ]
+then
+  echo "Cross mingw32"
+  sed -i -e '/CMPLR_PREFIX/d' epics-base/configure/os/CONFIG_SITE.linux-x86.win32-x86-mingw
+  cat << EOF >> epics-base/configure/os/CONFIG_SITE.linux-x86.win32-x86-mingw
+CMPLR_PREFIX=i686-w64-mingw32-
+EOF
+  cat << EOF >> epics-base/configure/CONFIG_SITE
+CROSS_COMPILER_TARGET_ARCHS+=win32-x86-mingw
+EOF
+fi
+
+if [ "$STATIC" = "YES" ]
+then
+  echo "Build static libraries/executables"
+  cat << EOF >> epics-base/configure/CONFIG_SITE
+SHARED_LIBRARIES=NO
+STATIC_BUILD=YES
+EOF
+fi
+
+case "$CMPLR" in
+clang)
+  echo "Host compiler is clang"
+  cat << EOF >> epics-base/configure/os/CONFIG_SITE.Common.$EPICS_HOST_ARCH
+GNU         = NO
+CMPLR_CLASS = clang
+CC          = clang
+CCC         = clang++
+EOF
+
+  # hack
+  sed -i -e 's/CMPLR_CLASS = gcc/CMPLR_CLASS = clang/' epics-base/configure/CONFIG.gnuCommon
+
+  clang --version
+  ;;
+*)
+  echo "Host compiler is default"
+  gcc --version
+  ;;
+esac
+
+cat <<EOF >> epics-base/configure/CONFIG_SITE
+USR_CPPFLAGS += $USR_CPPFLAGS
+USR_CFLAGS += $USR_CFLAGS
+USR_CXXFLAGS += $USR_CXXFLAGS
+EOF
+
+# set RTEMS to eg. "4.9" or "4.10"
+# requires qemu, bison, flex, texinfo, install-info
+if [ -n "$RTEMS" ]
+then
+  echo "Cross RTEMS${RTEMS} for pc386"
+  curl -L "https://github.com/mdavidsaver/rsb/releases/download/20171203-${RTEMS}/i386-rtems${RTEMS}-trusty-20171203-${RTEMS}.tar.bz2" \
+  | tar -C / -xmj
+
+  sed -i -e '/^RTEMS_VERSION/d' -e '/^RTEMS_BASE/d' epics-base/configure/os/CONFIG_SITE.Common.RTEMS
+  cat << EOF >> epics-base/configure/os/CONFIG_SITE.Common.RTEMS
+RTEMS_VERSION=$RTEMS
+RTEMS_BASE=$HOME/.rtems
+EOF
+  cat << EOF >> epics-base/configure/CONFIG_SITE
+CROSS_COMPILER_TARGET_ARCHS += RTEMS-pc386-qemu
+EOF
+fi
+
+make -j2 -C epics-base $EXTRA
+make -j2 -C pvData $EXTRA
+make -j2 -C normativeTypes $EXTRA
+make -j2 -C pvAccess $EXTRA

.gitignore

@@ -1,13 +1,17 @@
-bin/
-lib/
-doc/
-include/
-db/
-dbd/
-documentation/html
-documentation/*.tag
+/cfg/
+/bin/
+/lib/
+/db/
+/dbd/
+/html/
+/include/
+/templates/
+/configure/*.local
+/documentation/html
+/documentation/*.tag
+O.*/
+/QtC-*
 envPaths
-configure/*.local
-!configure/ExampleRELEASE.local
-**/O.*
-QtC-*
+*.orig
+*.log
+.*.swp

.readthedocs.yml

@@ -0,0 +1,17 @@
+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the documentation/ directory with Sphinx
+sphinx:
+  configuration: documentation/conf.py
+
+# Build documentation with MkDocs
+#mkdocs:
+#  configuration: mkdocs.yml
+
+# Optionally build your docs in additional formats such as PDF and ePub
+formats: all

.travis.yml

@@ -0,0 +1,30 @@
+sudo: false
+dist: trusty
+language: c++
+compiler:
+  - gcc
+addons:
+  apt:
+    packages:
+    - libreadline6-dev
+    - libncurses5-dev
+    - perl
+    - clang
+    - g++-mingw-w64-i686
+    - qemu-system-x86
+install:
+ - ./.ci/travis-prepare.sh
+script:
+ - ./.ci/travis-build.sh
+env:
+ - BRBASE=7.0
+ - BRBASE=7.0 CMPLR=clang
+ - BRBASE=7.0 EXTRA="CMD_CXXFLAGS=-std=c++98"
+ - BRBASE=7.0 EXTRA="CMD_CXXFLAGS=-std=c++11"
+ - BRBASE=7.0 CMPLR=clang EXTRA="CMD_CXXFLAGS=-std=c++11"
+ - BRBASE=7.0 WINE=32 TEST=NO STATIC=YES
+ - BRBASE=7.0 WINE=32 TEST=NO STATIC=NO
+ - BRBASE=7.0 RTEMS=4.10 TEST=NO
+ - BRBASE=7.0 RTEMS=4.9 TEST=NO
+ - BRBASE=3.16
+ - BRBASE=3.15

Doxyfile

@@ -38,7 +38,7 @@ PROJECT_NAME           = pvaClientCPP
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         =
+PROJECT_NUMBER         = 4.7.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
@@ -152,7 +152,7 @@ FULL_PATH_NAMES        = YES
 # will be relative from the directory where doxygen is started.
 # This tag requires that the tag FULL_PATH_NAMES is set to YES.
 
-STRIP_FROM_PATH        =
+STRIP_FROM_PATH        = src
 
 # The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of the
 # path mentioned in the documentation of a class, which tells the reader which
@@ -161,7 +161,7 @@ STRIP_FROM_PATH        =
 # specify the list of include paths that are normally passed to the compiler
 # using the -I flag.
 
-STRIP_FROM_INC_PATH    =
+STRIP_FROM_INC_PATH    = src
 
 # If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter (but
 # less readable) file names. This can be useful is your file systems doesn't
@@ -765,7 +765,8 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = include
+INPUT                  = src \
+                         src/pv
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
@@ -796,7 +797,7 @@ FILE_PATTERNS          =
 # be searched for input files as well.
 # The default value is: NO.
 
-RECURSIVE              = YES
+RECURSIVE              = NO
 
 # The EXCLUDE tag can be used to specify files and/or directories that should be
 # excluded from the INPUT source files. This way you can easily exclude a
@@ -1035,7 +1036,7 @@ GENERATE_HTML          = YES
 # The default directory is: html.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_OUTPUT            = documentation/html
+HTML_OUTPUT            = html/doxygen
 
 # The HTML_FILE_EXTENSION tag can be used to specify the file extension for each
 # generated HTML page (for example: .htm, .php, .asp).

README.md

@@ -1,49 +1,17 @@
-pvaClientCPP
-============
+# pvaClientCPP
 
-pvaClient is a synchronous client interface to pvAccess,
-which is callback based.
-pvaClient is thus easier to use than pvAccess itself.
+The **pvaClient** API provides a synchronous client interface that was designed to be easier to use than the original basic pvAccess client API.
 
-See documentation/pvaClientCPP.html for details.
+The pvaClientCPP module implements the pvaClient API for C++ client applications.
 
-Building
---------
+## Links
 
-If a proper RELEASE.local file exists one directory level above pvaClientCPP
-then just type:
+- General information about EPICS can be found at the
+  [EPICS Controls website](https://epics-controls.org).
+- API documentation for this module can be found in its
+  documentation directory, in particular the file
+  pvaClientCPP.html
 
-    make
+## Building
 
-It can also be built by:
-
-    cp configure/ExampleRELEASE.local configure/RELEASE.local
-    edit configure/RELEASE.local
-    make
-
-
-Examples
-------------
-
-Project exampleCPP has examples for pvaClientCPP
-
-Status
-------
-
-* The API is for EPICS Version 4 release 4.6.0
-* Everything defined in pvaClient.h is ready but see below for remaining work.
-* Everything defined in pvaClientMultiChannel.h is ready but see below for remaining work.
-
-
-pvaClientChannel
----------------
-
-Channel::getField and channelArray are not supported for release 4.6
-
-pvaClientMultiChannel
----------------
-
-For release 4.5 support is available for multiDouble and NTMultiChannel.
-In the future additional support should be provided that at least includes NTScalarMultiChannel.
-
-Testing with some channels not connected has not been done.
+This module is included as a submodule of a full EPICS 7 release and will be compiled during builds of that software.

configure/CONFIG_PVACLIENT_VERSION

@@ -0,0 +1,12 @@
+# Version number for the PVA Client API and shared library
+
+EPICS_PVACLIENT_MAJOR_VERSION = 4
+EPICS_PVACLIENT_MINOR_VERSION = 7
+EPICS_PVACLIENT_MAINTENANCE_VERSION = 0
+
+# Development flag, set to zero for release versions
+
+EPICS_PVACLIENT_DEVELOPMENT_FLAG = 0
+
+# Immediately after a release the MAINTENANCE_VERSION
+# will be incremented and the DEVELOPMENT_FLAG set to 1

configure/ExampleRELEASE.local

@@ -1,8 +0,0 @@
-EPICS4_DIR=/home/epicsv4/master
-PVACCESS=${EPICS4_DIR}/pvAccessCPP
-NORMATIVETYPES=${EPICS4_DIR}/normativeTypesCPP
-PVDATA=${EPICS4_DIR}/pvDataCPP
-PVCOMMON=${EPICS4_DIR}/pvCommonCPP
-
-TEMPLATE_TOP=$(EPICS_BASE)/templates/makeBaseApp/top
-EPICS_BASE=/home/install/epics/base

configure/Makefile

@@ -2,6 +2,8 @@ TOP=..
 
 include $(TOP)/configure/CONFIG
 
+CFG += CONFIG_PVACLIENT_VERSION
+
 TARGETS = $(CONFIG_TARGETS)
 CONFIGS += $(subst ../,,$(wildcard $(CONFIG_INSTALLS)))
 

configure/RELEASE

@@ -1,30 +1,44 @@
-# easyPVACPP RELEASE - Location of external support modules
+# RELEASE - Location of external support modules
 #
-# IF YOU CHANGE this file or any file it includes you must
-# subsequently do a "gnumake rebuild" in the application's
-# top level directory.
+# IF YOU CHANGE ANY PATHS in this file or make API changes to
+# any modules it refers to, you should do a "make rebuild" in
+# this application's top level directory.
 #
-# The build process does not check dependencies against files
-# that are outside this application, thus you should also do a
-# "gnumake rebuild" in the top level directory after EPICS_BASE
-# or any other external module pointed to below is rebuilt.
+# The EPICS build process does not check dependencies against
+# any files from outside the application, so it is safest to
+# rebuild it completely if any modules it depends on change.
 #
 # Host- or target-specific settings can be given in files named
 #  RELEASE.$(EPICS_HOST_ARCH).Common
 #  RELEASE.Common.$(T_A)
 #  RELEASE.$(EPICS_HOST_ARCH).$(T_A)
-
-# EPICS V4 Developers: Do not edit the locations in this file!
 #
-# A RELEASE.local must exist that has the following definitions
-#     EPICS_BASE=/home/install/epics/base
-#     EPICS4_DIR=/home/epicsv4
-#     PVCOMMON=${EPICS4_DIR}/pvCommonCPP
-#     PVDATA=${EPICS4_DIR}/pvDataCPP
-#     NORMATIVETYPES=${EPICSV4}/normativeTypesCPP
-#     PVACCESS=${EPICS4_DIR}/pvAccessCPP
-#Either create a RELEASE.local one level above the TOP for this module
-#OR copy ExampleRELEASE.local to RELEASE.local and edit it.
+# This file is parsed by both GNUmake and an EPICS Perl script,
+# so it may ONLY contain definititions of paths to other support
+# modules, variable definitions that are used in module paths,
+# and include statements that pull in other RELEASE files.
+# Variables may be used before their values have been set.
+# Build variables that are NOT used in paths should be set in
+# the CONFIG_SITE file.
 
+# Variables and paths to dependent modules:
+#MODULES = /path/to/modules
+#MYMODULE = $(MODULES)/my-module
+
+# If building the EPICS modules individually, set these:
+#EPICS_PVACCESS = $(MODULES)/pvAccess
+#EPICS_NORMATIVETYPES = $(MODULES)/normativeTypes
+#EPICS_PVDATA = $(MODULES)/pvData
+#EPICS_DATABASE = $(MODULES)/database
+#EPICS_CA = $(MODULES)/ca
+#EPICS_LIBCOM = $(MODULES)/libcom
+#EPICS_BASE = $(MODULES)/core
+
+# Set RULES here if you want to use build rules from elsewhere:
+#RULES = $(MODULES)/build-rules
+
+# These allow developers to override the RELEASE variable settings
+# without having to modify the configure/RELEASE file itself.
 -include $(TOP)/../RELEASE.local
+-include $(TOP)/../RELEASE.$(EPICS_HOST_ARCH).local
 -include $(TOP)/configure/RELEASE.local

documentation/RELEASE_NOTES.md

@@ -1,19 +1,108 @@
-EPICS V4 release 4.6
-==========================
+# pvaClientCPP Module
+
+This document summarizes the changes to the module between releases.
+
+## Release 4.7.0 (EPICS 7.0.3.1, Nov 2019)
+
+* added JSON support for put and putGet
+* Fix for
+  [GitHub issue #62](https://github.com/epics-base/pvaClientCPP/issues/62)
+* Doxygen updates and read-the-docs integration.
+
+
+## Release 4.6.0 (EPICS 7.0.3, Jul 2019)
+
+* pvaClient now handles exceptions from the server properly (issue #54).
+* MultiChannel classes now properly handle PV structures that don't have a top-level `value` field (issue #56), and are more tolerant of other missing fields (issue #57).
+
+
+## Release 4.5.0 (EPICS 7.0.2.2, Apr 2019)
+
+Changes have been made for getDouble, putDouble, getDoubleArray, putDoubleArray, getString, putString, getStringArray, and putStringArray.
+
+1) Previously each only had support for a top level field named value.
+Each now allows access to a single sub field that has the correct type.
+Thus pvRequest must select a single field. For example
+
+    pva->channel("PVRdumbPowerSupply")->putDouble(1.0,"power.value" );
+
+2) PvaChannel now has a method for each of the above.
+For example instead of
+
+    PvaClientChannelPtr channel = pva->channel("PVRdouble");
+    PvaClientPutPtr clientPut = channel->put();
+    PvaClientPutDataPtr putData = clientPut->getData();
+    putData->putDouble(1.0); clientPut->put();
+
+now it can be
+
+    pva->channel("PVRdouble")->putDouble(1.0 );
+
+3) getDoubleArray and putDoubleArray work with any numeric scalar array
+
+4) getStringArray and putStringArray work with any scalar array.
+
+## Release 4.4 (EPICS 7.0.2, Dec 2018)
+
+### API changes to PvaClientMonitor
+
+The create method that had arguments for stateChangeRequester and monitorRequester no longer exists.
+
+### API changes to PvaClientGet, ..., PvaClientMonitor
+
+Previously the pvaClientGet, ..., pvaClientMonitor classes all implemented PvaClientChannelStateChangeRequester(). This method was never called and has been removed.
+
+
+## Release 4.3 (EPICS 7.0.1, Dec 2017)
+
+### Requires pvDataCPP-7.0 and pvAccessCPP-6.0 versions
+
+This release will not work with older versions of these modules.
+
+### Destroy methods removed
+
+All the destroy() methods have been removed, implementation is RAII compliant.
+
+### API changes to PvaClientMonitor
+
+The second argument of method
+
+    static PvaClientMonitorPtr create(
+        PvaClientPtr const &pvaClient,
+        epics::pvAccess::Channel::shared_pointer const & channel,
+        epics::pvData::PVStructurePtr const &pvRequest
+    );
+
+is now changed to
+
+    static PvaClientMonitorPtr create(
+        PvaClientPtr const &pvaClient,
+        PvaClientChannelPtr const & pvaClientChannel,
+        epics::pvData::PVStructurePtr const &pvRequest
+    );
+
+A new method is also implemented
+
+    static PvaClientMonitorPtr create(
+        PvaClientPtr const &pvaClient,
+        std::string const & channelName,
+        std::string const & providerName,
+        std::string const & request,
+        PvaClientChannelStateChangeRequesterPtr const & stateChangeRequester,
+        PvaClientMonitorRequesterPtr const & monitorRequester
+    );
+
+
+## Release 4.2 (EPICS V4.6, Aug 2016)
 
 * The examples are moved to exampleCPP.
 * Support for channelRPC is now available.
 * In PvaClientMultiChannel checkConnected() now throws an exception if connect fails.
 
 
-
-EPICS V4 release 4.5
-==========================
-
+## Release 4.1 (EPICS V4.5, Oct 2015)
 
 pvaClient is a synchronous API for pvAccess.
 
-
 This is the first release of pvaClientCPP.
 It provides an API that is similar to pvaClientJava.
-

documentation/_static/css/custom.css

@@ -0,0 +1,7 @@
+.wy-side-nav-search {
+    background-color: #18334B;
+}
+
+.wy-side-nav-search input[type="text"] {
+    border-color: #18334b;
+}

documentation/conf.py

@@ -0,0 +1,80 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# http://www.sphinx-doc.org/en/master/config
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+# import os
+# import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+
+# -- Project information -----------------------------------------------------
+
+project = 'normativeTypes (C++)'
+copyright = '2019, EPICS Controls.'
+author = 'EPICS'
+
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'sphinx.ext.intersphinx',
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+
+# Intersphinx links to subprojects
+intersphinx_mapping = {
+}
+
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'sphinx_rtd_theme'
+
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+html_css_files = [
+    'css/custom.css',
+]
+
+master_doc = 'index'
+
+html_theme_options = {
+    'logo_only': True,
+}
+html_logo = "images/EPICS_white_logo_v02.png"
+
+html_extra_path = [
+    '../html',
+    'pvaClientCPP.html',
+]
+
+
+# -- Run Doxygen ------------------------------------------------------------
+
+import subprocess
+subprocess.call('cd ..; mkdir -p html/doxygen; doxygen', shell=True)

documentation/htmldoxygen/README.md

@@ -0,0 +1,5 @@
+NOT FOR DIRECT USE
+==================
+
+This directory holds files that are used by doxygen.
+The files are not meant to be read except via the doxygen documention.

documentation/htmldoxygen/pvaClient.html

@@ -0,0 +1,146 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClient</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
+     span.term { font-family:courier }
+     span.user { font-family:courier }
+     span.user:before { content:"<" }
+     span.user:after { content:">" }
+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClient</h1>
+
+
+<h2>Overview</h2>
+<p>
+pvaClient is a synchronous wrapper for the pvAccess API, which is a callback based API.
+Thus it is easier to use than pvAccess itself.
+In addition pvaClient provides many convenience methods.
+</p>
+<p>
+Class <b>PvaClient</b> is a class that is used by all the other pvaClient classes.
+An application that uses pvaClient must call:</p>
+<pre>
+PvaClientPtr pvaClient = PvaClient::get(providers);
+</pre>
+<p>
+before it uses any other pvaClient classes.
+</p>
+<p>
+This is a singleton method, i. e. only one instance of PvaClient is created.
+</p>
+<p>
+<b>pvaClient</b> must not be deleted until the client no longer wants to use any part
+of pvaClient.
+</p>
+<p>
+<b>providers</b> is a blank separated set of provider names.
+For example:</p>
+<pre>
+PvaClientPtr pvaClient = PvaClient::get("ca pva");
+</pre>
+<p>
+The providers <b>ca</b> and <b>pva</b> are special.
+For each of these a client context is created when the <b>PvaClient</b>
+is constructed and the context destroyed when <b>PvaClient</b> is deleted.
+</p>
+<h2>Channel Caching</h2>
+<p>
+<b>PvaClient</b> has a method:
+</p>
+<pre>
+PvaClientChannelPtr channel(
+    string const &amp; channelName,
+    string const &amp;providerName = "pva",
+    double timeOut = 5.0);
+</pre>
+<p>
+This method creates a
+<b>PvaClientChannel</b> and then connects to the channel.
+</p>
+<p>
+If a call is successful then multiple calls to the same channelName and providerName
+share the same PvaClientChannel, i. e. the PvaClientChannel is cached.
+</p>
+<p>
+<b>pvaClientChannelGet</b> and <b>pvaClientChannelPut</b> also implement caching.
+</p>
+<p>
+For example consider a client that makes multiple calls like:
+</p>
+<pre>
+double value;
+value =  pva->channel(channelName)->get()->getData()->getDouble();
+...
+value =  pva->channel(channelName)->get()->getData()->getDouble();
+</pre>
+<p>
+Only the first call creates a new PvaClientChannel and a new PvaClientGet.
+The second call reuses the cached PvaClientChannel and PvaClientGet.
+</p>
+<h2>Non Cached Channels</h2>
+<p>
+<b>PvaClient</b> has a method:
+</p>
+<pre>
+PvaClientChannelPtr createChannel(
+    string const &amp; channelName,
+    string const &amp;providerName = "pva");
+</pre>
+<p>
+This method is just creates a new PvaClientChannel and returns it to the caller.
+The caller must call the PvaClientChannel connect methods.
+</p>
+
+<h2>Blocking vs Non-Blocking Methods</h2>
+<p>Each component of pvaClient provides a set of blocking and non-blocking calls.
+For example several components (examples are <b>PvaClientChannel</b> and <b>PvaChannelGet</b>)
+have methods:</p>
+<dl>
+    <dt>connect</dt>
+       <dd>
+        This calls issueConnect and then waitConnect.
+        If waitConnect fails an exception is thrown.
+        Since waitConnect is a blocking method so is this.
+       </dd>
+    <dt>issueConnect</dt>
+       <dd>
+         This is a request to connect, i. e. issue a request to the server to create something
+         on the server. This is a non blocking call.
+       </dd>
+    <dt>waitConnect</dt>
+       <dd>
+         This waits for the server to respond to issueConnect.
+         It blocks until the server responds or a timeout occurs.
+       </dd>
+</dl>
+
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientChannel.html

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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientChannel</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
+     span.term { font-family:courier }
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+     span.user:before { content:"<" }
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+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientChannel</h1>
+
+<h2>Overview</h2>
+<p>
+pvaClientChannel is a synchronous wrapper for the pvAccess::Channel API, which is a callback based API.
+Thus it is easier to use than pvAccess::Channel itself.
+</p>
+<p>An instance of <b>PvaClientChannel</b> connects to a single channel.
+An instance can only be created via class <b>PvaClient</b> which has both synchronous methods, which block, and non blocking methods.
+The synchrouous methods block until a connection is made to the channel and throw an exception if a 
+timeout occurs while trying to make a connection.
+The non blocking methods leave connection to the caller.
+</p>
+<p><b>PvaClientChannel</b> has methods:</p>
+<dl>
+   <dt>Connect to channel</dt>
+     <dd>These can be called indirectly by a blocking request to <b>PvaClient</b>
+       or by the client if a non blocking request is made to <b>PvaClient</b>.
+     </dd>
+   <dt>Channel state change requester</dt>
+     <dd>The client can provide a callback that is called each time the connection state
+       of the channel changes.
+     </dd>
+   <dt>Creating all of the following</dt>
+   <dd>
+<pre>
+PvaClientField      NOT IMPLEMENTED
+PvaClientProcess
+PvaClientGet
+PvaClientPut
+PvaClientPutGet
+PvaClientMonitor
+PvaClientArray      NOT IMPLEMENTED
+PvaClientRPC
+</pre>
+   </dd>
+</dl>
+<h2>Connect: Blocking vs Non-Blocking </h2>
+<p><b>PvaClientChannel</b> has methods:</p>
+<dl>
+    <dt>connect</dt>
+       <dd>
+        This calls issueConnect and then waitConnect.
+        If waitConnect fails an exception is thrown.
+        Since waitConnect is a blocking method so is this.
+       </dd>
+    <dt>issueConnect</dt>
+       <dd>
+         This is a request to connect to the channel. This is a non blocking call.
+       </dd>
+    <dt>waitConnect</dt>
+       <dd>
+         This waits for the server to respond to issueConnect.
+         It blocks until the server responds or a timeout occurs.
+       </dd>
+</dl>
+
+<h2>Get and Put Caching</h2>
+<p>
+<b>PvaClientChannel</b> has methods:
+</p>
+<pre>
+PvaClientGetPtr get(std::string const &amp; request);
+PvaClientPutPtr put(std::string const &amp; request);
+</pre>
+<p>
+Each of these caches.
+For example all calls to <b>get</b> with the same <b>request</b> will share the same
+<b>PvaChannelGet</b>
+</p>
+<p>
+For example consider a client that makes multiple calls like:
+</p>
+<pre>
+double value;
+value =  pva->channel(channelName)->get()->getData()->getDouble();
+...
+value =  pva->channel(channelName)->get()->getData()->getDouble();
+</pre>
+<p>
+Only the first call creates a new PvaClientChannel and a new PvaClientGet.
+The second call reuses the cached PvaClientChannel and PvaClientGet.
+</p>
+
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientChannelStateChangeRequester.html

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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientChannelStateChangeRequester</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
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+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientChannelStateChangeRequester</h1>
+
+<p>This class has the single method <b>channelStateChange</b>.
+It is called each time the channel connection status changes.
+</p>
+<p>
+<b>NOTE:</b>
+The implementation must not call a method that blocks waiting for a response from the server.
+It it does the client may be blocked forever.
+</p>
+<p>
+An example of illegal code is:
+</p>
+<pre>
+virtual void channelStateChange(PvaClientChannelPtr const & channel, bool isConnected)
+{
+    if(isConnected&&!pvaClientPut)
+    {
+       pvaClientPut  = pvaClientChannel->createPut(request);
+       pvaClientPut->connect();
+    }
+}
+</pre>
+<p>
+This is illegal because the call to <b>connect</b> blocks.
+</p>
+<p>The following is an example of legal code:
+</p>
+<pre>
+virtual void channelStateChange(PvaClientChannelPtr const & channel, bool isConnected)
+{
+    if(isConnected&&!pvaClientPut)
+    {
+       pvaClientPut  = pvaClientChannel->createPut(request);
+       pvaClientPut->issueConnect();
+    }
+}
+</pre>
+<p>This is legal code because neither <b>createPut</b> or <b>issueConnect</b>
+blocks.
+</p>
+
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientGet.html

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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientGet</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
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+     span.opt { color: grey }
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+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientGet</h1>
+
+
+<p>
+pvaClientGet is a synchronous wrapper for the pvAccess::ChannelGet API, which is a callback based API.
+Thus it is easier to use than pvAccess::ChannelGet itself.
+</p>
+<p>An instance of PvaClientGet is created via a call to one of the following:</p>
+<pre>
+class PvaClientChannel
+...
+{
+...
+    PvaClientGetPtr get(std::string const &amp; request = "field(value,alarm,timeStamp)");
+    PvaClientGetPtr createGet(std::string const &amp; request = "");
+    PvaClientGetPtr createGet(epics::pvData::PVStructurePtr const &amp;  pvRequest);
+...
+};
+<p>An instance of <b>PvaClientGet</b> connects to a single channel.
+<b>PvaClientGet</b> has both synchronous methods, which block, and non blocking methods.
+</p>
+<p><b>PvaClientChannel</b> has methods:</p>
+<pre>
+connect             Calls issueConnect and then waitConnect.
+issueConnect        issues a request to the server to create the server side of ChannelPut.
+waitConnect         blocks until server responds that it has created the ChannelPut.
+get                 Calls issueGet and then waitGet.
+issueGet            issues a get request to the server.
+waitGet             waits until the server send a message that the get is complete.
+getData             get the data.
+</pre>
+<p>
+<b>issueConnect</b> and <b>issueGet</b> do not block.
+All other methods can block.
+</p>
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientGetData.html

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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientGetData</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
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+     span.opt { color: grey }
+     span.nterm { font-style:italic }
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+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientGetData</h1>
+
+<p>This class provides access to the data returned by calls to get data via <b>PvaChannelGet</b>
+It provides methods:</p>
+<pre>
+getStructure          Get the introspection interface for data returned from server
+getPVStructure        Get the complete set of data returned from the server.
+getChangedBitSet      Get the bitSet that shows which fields have a new value since last get.
+showChanged           Show all the fields that have changed value since the last get,
+getAlarm              If a alarm field is available get it.
+getTimeStamp          If a timeStamp field is available get it.
+hasValue              Does the PVStructure have a top level field named value
+NOTE: The following only apply if hasValue is true.
+isValueScalar         Is the value field a scalar?
+isValueScalarArray    Is the value field a scalar array?
+getValue              Get the value field.
+getScalarValue        Get a scalar value field.
+getArrayValue         Get an array value field.
+getScalarArrayValue   Get a scalar array value field.
+getDouble             Get scalar value field as a double.
+getString             Get value field as a string.
+getDoubleArray        Get value field as a double array.
+getStringArray        Get value field as a string array.
+</pre>
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientGetRequester.html

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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientGetRequester</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
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+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientGetRequester</h1>
+
+<p>This is a virtual class that can be implemented by a client that uses <b>PvaClientGet</b>.
+It has the methods:</p>
+<pre>
+virtual void channelGetConnect(
+    const Status&amp; status,
+    PvaClientGetPtr const &amp; clientGet) {}
+virtual void getDone(
+    const Status&amp; status,
+    PvaClientGetPtr const &amp; clientGet) = 0;
+</pre>
+
+<p>The client must call</p>
+<pre>
+pvaClientGet->setRequester(shared_from_this());
+</pre>
+<p>
+after creating an instance of PvaClientGet.
+</p>
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientMonitor.html

@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientMonitor</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
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+     span.user { font-family:courier }
+     span.user:before { content:"<" }
+     span.user:after { content:">" }
+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientMonitor</h1>
+<p>
+<b>NOTE:</b> This is a work in progress.
+</p>
+<h2>Overview</h2>
+<p>
+This provides an easier way to create a monitor on a channel than to use pvAccessCPP itself.
+It provides two main ways to create a monitor:
+</p>
+<h3>The client first creates a PvaClientMonitorChannel and then creates a monitor</h3>
+The client calls:
+<pre>
+static PvaClientMonitorPtr create(
+    PvaClientMonitorPtr const &amp;PvaClientMonitor,
+    PvaClientMonitorChannelPtr const &amp; PvaClientMonitorChannel,
+    epics::pvData::PVStructurePtr const &amp;pvRequest
+);
+
+where
+
+PvaClientMonitor
+    The PvaClientMonitor.
+
+PvaClientMonitorChannel
+    The PvaClientMonitorChannel that has already been created by the client.
+
+pvRequest
+    The pvRequest for creating the monitor.
+</pre>
+With this method the monitor is created and started.
+This method blocks while the monitor is created.
+<h3>The client provides names for a channel and a provider</h3>
+The client calls:
+<pre>
+static PvaClientMonitorPtr create(
+    PvaClientMonitorPtr const &amp;PvaClientMonitor,
+    std::string const &amp; channelName,
+    std::string const &amp; providerName,
+    std::string const &amp; request,
+    PvaClientMonitorChannelStateChangeRequesterPtr const &amp; stateChangeRequester,
+    PvaClientMonitorRequesterPtr const &amp; monitorRequester
+);
+
+where
+
+PvaClientMonitor
+    The PvaClientMonitor.
+
+channelName
+    The name of the channel.
+
+providerName
+    The name of the provider
+
+request
+    The request for creating the monitor
+
+stateChangeRequester
+    The client supplied state change requester.
+    This will be called each time a state change for the channel occurs.
+
+monitorRequester
+    The client supplied monitor requester.
+    This is called each time a new monitor event is available.
+</pre>
+With this method a pvaChannel is created and after it connects a pvaMonitor is created and started.
+This method never blocks.
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientMonitorData.html

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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientMonitorData</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
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+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
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+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientMonitorData</h1>
+
+
+<p>This class provides access to the data returned by calls to get data via <b>PvaChannelGet</b>
+It provides methods:</p>
+<pre>
+getStructure          Get the introspection interface for data returned from server
+getPVStructure        Get the complete set of data returned from the server.
+getChangedBitSet      Get the bitSet that shows which fields have a new value since last monitor event.
+getOverrunBitSet      Get the bitSet that shows which fields have changed more than once since last monitor event.
+showChanged           Show all the fields that have changed value since the last monitor event,
+showChanged           Show all the fields that have changed value more than once since last monitor event.
+getAlarm              If a alarm field is available get it.
+getTimeStamp          If a timeStamp field is available get it.
+hasValue              Does the PVStructure have a top level field named value
+NOTE: The following only apply if hasValue is true.
+isValueScalar         Is the value field a scalar?
+isValueScalarArray    Is the value field a scalar array?
+getValue              Get the value field.
+getScalarValue        Get a scalar value field.
+getArrayValue         Get an array value field.
+getScalarArrayValue   Get a scalar array value field.
+getDouble             Get scalar value field as a double.
+getString             Get value field as a string.
+getDoubleArray        Get value field as a double array.
+getStringArray        Get value field as a string array.
+</pre>
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientMonitorRequester.html

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientMonitorRequester</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
+     span.term { font-family:courier }
+     span.user { font-family:courier }
+     span.user:before { content:"<" }
+     span.user:after { content:">" }
+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientMonitorRequester</h1>
+
+<p>This is a virtual class that can be implemented by a client that uses <b>PvaClientMonitor</b>.
+It has the methods:</p>
+<pre>
+virtual void monitorConnect(
+    const Status&amp; status,
+    PvaClientMonitorPtr const &amp; clientMonitor,
+    StructureConstPtr const &amp; structure) {}
+virtual void event(
+    PvaClientMonitor const &amp; clientGet) = 0;
+virtual void unlisten()
+{
+     std::cerr &lt;&lt; "PvaClientMonitorRequester::unlisten called"
+               &lt;&lt; " but no PvaClientMonitorRequester::unlisten\n";
+}
+</pre>
+
+<p>The client must call</p>
+<pre>
+pvaClientMonitor->setRequester(shared_from_this());
+</pre>
+<p>
+after creating an instance of PvaClientMonitor.
+</p>
+
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientProcess.html

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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientProcess</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
+     span.term { font-family:courier }
+     span.user { font-family:courier }
+     span.user:before { content:"<" }
+     span.user:after { content:">" }
+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientProcess</h1>
+
+<p>
+pvaClientProcess is a synchronous wrapper for the pvAccess::ChannelProcess API, which is a callback based API.
+Thus it is easier to use than pvAccess::ChannelProcess itself.
+</p>
+<p>An instance of PvaClientProcess is created via a call to one of the followimg:</p>
+<pre>
+class PvaClientChannel
+...
+{
+...
+    PvaClientProcessPtr createProcess(std::string const &amp; request = "");
+    PvaClientProcessPtr createProcess(epics::pvData::PVStructurePtr const &amp;  pvRequest);
+...
+};
+<p>An instance of <b>PvaClientProcess</b> connects to a single channel.
+<b>PvaClientProcess</b> has both synchronous methods, which block, and non blocking methods.
+</p>
+<p><b>PvaClientChannel</b> has methods:</p>
+<pre>
+connect             Calls issueConnect and then waitConnect.
+issueConnect        issues a request to the server to create the server side of ChannelPut.
+waitConnect         blocks until server responds that it has created the ChannelPut.
+process             Calls issueProcess and then waitProcess.
+issueProcess        issues a process request to the server.
+waitProcess         waits until the server send a message that the process is complete.
+</pre>
+<p>
+<b>issueConnect</b> and <b>issueProcess</b> do not block.
+All other methods can block.
+</p>
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientPut.html

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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientChannelPut</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
+     span.term { font-family:courier }
+     span.user { font-family:courier }
+     span.user:before { content:"<" }
+     span.user:after { content:">" }
+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientChannelPut</h1>s
+
+<p>
+pvaClientPut is a synchronous wrapper for the pvAccess::ChannelPut API, which is a callback based API.
+Thus it is easier to use than pvAccess::ChannelPut itself.
+</p>
+<p>
+<b>NOTE:</b>
+Except for union fields pvaClientPut takes care of modifying the bitSet associated with
+the data sent to the server.
+</p>
+<p>An instance of PvaClientPut is created via a call to one of the followimg:</p>
+<pre>
+class PvaClientChannel
+...
+{
+...
+    PvaClientPutPtr put(std::string const & request = "field(value,alarm,timeStamp)");
+    PvaClientPutPtr createPut(std::string const & request = "");
+    PvaClientPutPtr createPut(epics::pvData::PVStructurePtr const &  pvRequest);
+...
+};
+<p>An instance of <b>PvaClientPut/b> connects to a single channel.
+<b>PvaClientPut</b> has both synchronous methods, which block, and non blocking methods.
+</p>
+<p><b>PvaClientPut</b> has methods:</p>
+<pre>
+connect             Calls issueConnect and then waitConnect.
+issueConnect        issues a request to the server to create the server side of ChannelPut.
+waitConnect         blocks until server responds that it has created the ChannelPut.
+get                 Calls issueGet and then waitGet.
+issueGet            issues a request to the server to get the latest data.
+waitGet             waits until the server send a message that the get is complete.
+put                 Calls issuePut and then waitPut.
+issuePut            issues a put request to the server.
+waitPut             waits until the server send a message that the put is complete.
+getData             get the data.
+</pre>
+<p>
+Note that <b>issueConnect</b>, <b>issueGet</b>  and <b>issuePut</b> do not block but all other methods
+do block.
+</p>
+
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientPutData.html

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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientPutData</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
+     span.term { font-family:courier }
+     span.user { font-family:courier }
+     span.user:before { content:"<" }
+     span.user:after { content:">" }
+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientPutData</h1>
+
+<p>This class provides access to data to send to the server via a <b>PvaChannelPut</b>
+It is created by <b>PvaChannelPut</b> or <b>PvaChannelPutGet</b>.
+This the client only gets access to an instance by getting it from <b>PvaChannelPut</b> or <b>PvaChannelPutGet</b>.
+<p>
+<p>Note also that for all field types except <b>union</b> the <b>BitSet</b> for the data is updated
+by <b>PvaChannelPut</b> or <b>PvaChannelPutGet</b> whenever the client changes a field.
+For a <b>union</b> or <b>unionArray</b> field the client must update the <b>BitSet</b>.
+</p>
+
+<p>
+PvaClientPutData provides methods:</p>
+<pre>
+getStructure          Get the introspection interface for data sent to server
+getPVStructure        Get the complete set of data sent to the server.
+getChangedBitSet      Get the bitSet that shows which fields have a new value since last get.
+showChanged           Show all the fields that have changed value since the last get,
+getAlarm              If a alarm field is available get it.
+getTimeStamp          If a timeStamp field is available get it.
+hasValue              Does the PVStructure have a top level field named value
+NOTE: The following only apply if hasValue is true.
+isValueScalar         Is the value field a scalar?
+isValueScalarArray    Is the value field a scalar array?
+getValue              Get the value field.
+getScalarValue        Get a scalar value field.
+getArrayValue         Get an array value field.
+getScalarArrayValue   Get a scalar array value field.
+getDouble             Get scalar value field as a double.
+getString             Get value field as a string.
+getDoubleArray        Get value field as a double array.
+getStringArray        Get value field as a string array.
+putDouble             Put scalar value field as a double.
+putString             Put value field as a string.
+putDoubleArray        Put value field as a double array.
+putStringArray        Put value field as a string array.
+</pre>
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientPutGet.html

@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientPutGetGet</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
+     span.term { font-family:courier }
+     span.user { font-family:courier }
+     span.user:before { content:"<" }
+     span.user:after { content:">" }
+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientPutGetGet</h1>
+
+<p>
+pvaClientPutGet is a synchronous wrapper for the pvAccess::ChannelPutGet API, which is a callback based API.
+Thus it is easier to use than pvAccess::ChannelPut itself.
+</p>
+<p>
+<b>NOTE:</b>
+Except for union fields pvaClientPutGet takes care of modifying the bitSet associated with
+the data sent to the server.
+</p>
+<p>An instance of PvaClientPutGet is created via a call to one of the followimg:</p>
+<pre>
+class PvaClientChannel
+...
+{
+...
+    PvaClientPutGetPtr createPutGet(std::string const &amp; request);
+    PvaClientPutGetPtr createPutGet(epics::pvData::PVStructurePtr const &amp;  pvRequest);
+...
+};
+<p>An instance of <b>PvaClientPutGet</b> connects to a single channel.
+<b>PvaClientPutGet</b> has both synchronous methods, which block, and non blocking methods.
+</p>
+<p><b>PvaClientPutGet</b> has methods:</p>
+<pre>
+connect             calls issueConnect and then waitConnect.
+issueConnect        issues a request to the server to create the server side of ChannelPut.
+waitConnect         blocks until server responds that it has created the ChannelPut.
+putGet              call issuePutGet and then waitPutGet.
+issuePutGet         issue a putGet and return immediately.
+waitPutGet          wait until putGet completes.
+getGet              calls issueGetGet and then waitGetGet.
+issueGetGet         issues a request to the server to get the latest data for the get data.
+waitGetGet          waits until the server send a message that the getGet is complete.
+getPut              calls issueGetPut and then waitGetPut.
+issueGetPut         issues a request to the server to get the latest data for the put data.
+waitGetPut          waits until the server send a message that the getPut is complete.
+getPutData          get the put portion of the data.
+getGetData          get the get portion of the data.
+</pre>
+<p>
+<b>issueConnect</b>, <b>issuePutGet</b>,  <b>issueGetGet</b>  and <b>issueGetPut</b> do not block.
+All other methods can block.
+</p>
+
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientPutGetRequester.html

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientPutGetRequester</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
+     span.term { font-family:courier }
+     span.user { font-family:courier }
+     span.user:before { content:"<" }
+     span.user:after { content:">" }
+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientPutGetRequester</h1>
+
+<p>This is a virtual class that can be implemented by a client that uses <b>PvaClientPut</b>.
+It has the methods:</p>
+<pre>
+virtual void channelPutGetConnect(
+    const Status&amp; status,
+    PvaClientPutGetPtr const &amp; clientPutGet) {}
+virtual void putGetDone(
+    const Status&amp; status,
+    PvaClientPutGetPtr const &amp; clientPutGet) {}
+virtual void getPutDone(
+    const Status&amp; status,
+    PvaClientPutGetPtr const &amp; clientPutGet) = 0;
+virtual void getGetDone(
+    const Status&amp; status,
+    PvaClientPutGetPtr const &amp; clientPutGet) = 0;
+</pre>
+
+<p>The client must call</p>
+<pre>
+pvaClientPutGet->setRequester(shared_from_this());
+</pre>
+<p>
+after creating an instance of PvaClientPutGet.
+</p>
+
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientPutRequester.html

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientPutRequester</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
+     span.term { font-family:courier }
+     span.user { font-family:courier }
+     span.user:before { content:"<" }
+     span.user:after { content:">" }
+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientPutRequester</h1>
+
+<p>This is a virtual class that can be implemented by a client that uses <b>PvaClientPut</b>.
+It has the methods:</p>
+<pre>
+virtual void channelPutConnect(
+    const Status&amp; status,
+    PvaClientPutPtr const &amp; clientPut) {}
+virtual void getDone(
+    const Status&amp; status,
+    PvaClientPutPtr const &amp; clientPut) {}
+virtual void putDone(
+    const Status&amp; status,
+    PvaClientPutPtr const &amp; clientPut) = 0;
+</pre>
+
+<p>The client must call</p>
+<pre>
+pvaClientPut->setRequester(shared_from_this());
+</pre>
+<p>
+after creating an instance of PvaClientPut.
+</p>
+
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientRPC.html

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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientRPC</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
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+     span.user { font-family:courier }
+     span.user:before { content:"<" }
+     span.user:after { content:">" }
+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientRPC</h1>
+
+<p>
+<b>Not Yet Written</b>
+</p>
+
+</body>
+</html>
+

documentation/htmldoxygen/pvaClientRPCRequester.html

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+  <title>PvaClientRPCRequester</title>
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/base.css" />
+  <link rel="stylesheet" type="text/css"
+  href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
+  <style type="text/css">
+  /*<![CDATA[*/
+     .about { margin-left: 3em; margin-right: 3em; font-size: .83em}
+     table { margin-left: auto; margin-right: auto }
+     .diagram { text-align: center; margin: 2.5em 0 }
+     span.opt { color: grey }
+     span.nterm { font-style:italic }
+     span.term { font-family:courier }
+     span.user { font-family:courier }
+     span.user:before { content:"<" }
+     span.user:after { content:">" }
+     .nonnorm { font-style:italic }
+     p.ed { color: #AA0000 }
+     span.ed { color: #AA0000 }
+     p.ed.priv { display: inline; }
+     span.ed.priv { display: inline; }
+  /*]]>*/</style>
+  <!-- Script that generates the Table of Contents -->
+  <script type="text/javascript"
+  src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
+  </script>
+</head>
+<body>
+
+<h1>PvaClientRPCRequester</h1>
+
+<p>
+<b>Not Yet Written</b>
+</p>
+
+</body>
+</html>
+

documentation/index.rst

@@ -0,0 +1,17 @@
+pvaClient (C++) Library
+========================
+
+.. toctree::
+   :hidden:
+
+   EPICS Website <https://epics-controls.org>
+   EPICS Documentation Home <https://docs.epics-controls.org>
+
+
+.. toctree::
+   :maxdepth: 1
+   :caption: pvaClientCPP
+
+   Reference Manual <https://docs.epics-controls.org/projects/pvaclient-cpp/en/latest/pvaClientCPP.html>
+   API Documentation <https://docs.epics-controls.org/projects/pvaclient-cpp/en/latest/doxygen>
+   Source Code Repository on GitHub <https://github.com/epics-base/pvaClientCPP>

documentation/pvaClientCPP.html

@@ -4,7 +4,7 @@
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
   <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
-  <title>EPICS pva</title>
+  <title>EPICS pvaClientCPP</title>
   <link rel="stylesheet" type="text/css"
   href="http://epics-pvdata.sourceforge.net/base.css" />
   <link rel="stylesheet" type="text/css"
@@ -26,13 +26,13 @@
 
 <div class="head">
 <h1>EPICS pvaClientCPP</h1>
-<h2 class="nocount">Release 4.2.0-SNAPSHOT - 2016-07-14</h2>
+<h2 class="nocount">Release 4.4 - April 2019</h2>
 
 <h2 class="nocount">Abstract</h2>
 
-<p>pvaClient is a software library that provides to an EPICS client programmer, a friendly
-client side programming interface to the data of an EPICS based control system. It is intended 
-for such uses as rapid development of ad hoc programs by controls engineers, or to provide 
+<p>pvaClient is a software library that provides, to an EPICS client programmer, a friendly
+client side programming interface to the data of an EPICS based control system. It is intended
+for such uses as rapid development of ad hoc programs by controls engineers, or to provide
 scientists a way to directly develop analytical applications.</p>
 
 <p>Specifically, pvaClient provides a synchronous interface for pvAccess, which is the
@@ -41,7 +41,7 @@ pvAccess provides a callback based interface, which can be hard to use.
 pvaClient provides an interface that does not require callbacks even for monitors.
 </p>
 <p>
-pvaClientChannel provides many "convenience" methods to directly get and put 
+pvaClientChannel provides many "convenience" methods to directly get and put
 scalar and scalarArray data types.
 Additional methods provide access to the full features of pvAccess.
 </p>
@@ -62,40 +62,32 @@ The data for the channels is presented via normative type NTMultiChannel.
 
 </div> <!-- head -->
 
-<div id="toc">
-  <h2 class="nocount">Table of Contents</h2>
-</div>
-
-<!-- Place what you would like in the Table of Contents, inside the contents div -->
-<div id="contents" class="contents">	  
+<div id="contents" class="contents">
 <hr />
 <h2>Overview</h2>
 <p>
-pvaClientCPP is one of the components of 
+pvaClientCPP is one of the components of
 <a href="http://epics-pvdata.sourceforge.net">
 EPICS Version 4
 </a>
 </p>
-<p>This document is only a guide to help locate code and documentation related to pvDatabaseCPP
+<p>This document is only a guide to help locate code and documentation related to pvaClientCPP
 </p>
 <p>
-It is intended for developers that want to use pvDatabaseCPP.
+It is intended for developers that want to use pvaClientCPP.
 </p>
 <h2>Developer Guide</h2>
 <p>A guide for developers is available at
 <a
-href="http://epics-pvdata.sourceforge.net/informative/developerGuide/developerGuide.html">
+href="https://mrkraimer.github.io/website/developerGuide/developerGuide.html">
 developerGuide
 </a>
 </p>
-<p>This guide discusses all the components that are part of an <b>EPICS V4</b> release.
+<p>This guide provides an overview of  the components that are part of an <b>EPICS V4</b> release.
 Some understanding of the components and how they are related is necessary in order to
-develop code that uses pvDatabaseCPP.
+develop code that uses pvaClientCPP.
 In particular read everything related to pvaClient.
 </p>
-<p>The developerGuide discusses code in a way that applies to both CPP and C++.
-For the descriptions of the CPP specific code consult the next section.
-</p>
 
 <h2>doxygen</h2>
 <p>doxygen documentation is available at
@@ -104,9 +96,9 @@ href="./html/index.html">doxygen</a>
 </p>
 
 <h2>exampleCPP</h2>
-<p>Example code is available as part of this release.
+<p>Example code is available at
 <a
-href="http://epics-pvdata.sourceforge.net/docbuild/exampleCPP/tip/documentation/exampleCPP.html">
+href="https://github.com/epics-base/exampleCPP">
 exampleCPP
 </a>
 </p>

jenkins/cloudbees_build

@@ -21,28 +21,19 @@ installE4 () {
     local module=$1
     local branch=$2
 
-    # If microbench version does not exist, try without
-    if [ "${MB}" = "WITH_MICROBENCH" ]; then
-        if ! wget -nv https://openepics.ci.cloudbees.com/job/e4-cpp-${module}-${branch}-build/BASE=${BASE},MB=WITH_MICROBENCH/lastSuccessfulBuild/artifact/${module}.CB-dist.tar.gz; then
-            wget -nv https://openepics.ci.cloudbees.com/job/e4-cpp-${module}-${branch}-build/BASE=${BASE},MB=NO_MICROBENCH/lastSuccessfulBuild/artifact/${module}.CB-dist.tar.gz
-        fi
-    else
-        wget -nv https://openepics.ci.cloudbees.com/job/e4-cpp-${module}-${branch}-build/BASE=${BASE},MB=NO_MICROBENCH/lastSuccessfulBuild/artifact/${module}.CB-dist.tar.gz
-    fi
+    wget -nv https://openepics.ci.cloudbees.com/job/e4-cpp-${module}-${branch}-build/BASE=${BASE}/lastSuccessfulBuild/artifact/${module}.CB-dist.tar.gz
     tar -xzf ${module}.CB-dist.tar.gz
 }
 
 ###########################################
-# Defaults for EPICS Base and MB
+# Defaults for EPICS Base
 
 DEFAULT_BASE=3.15.4
 BASE=${BASE:-${DEFAULT_BASE}}
-MB=${MB:-"NO_MICROBENCH"}
 
 ###########################################
 # Dependent module branches
 
-PVCOMMON_BRANCH="master"
 PVDATA_BRANCH="master"
 PVACCESS_BRANCH="master"
 NORMATIVETYPES_BRANCH="master"
@@ -59,7 +50,6 @@ cd ${STUFF}
 installTool Boost 1.61.0
 installTool Base ${BASE}
 
-installE4 pvCommon ${PVCOMMON_BRANCH}
 installE4 pvData ${PVDATA_BRANCH}
 installE4 pvAccess ${PVACCESS_BRANCH}
 installE4 normativeTypes ${NORMATIVETYPES_BRANCH}

jenkins/cloudbees_doc

@@ -21,14 +21,7 @@ installE4 () {
     local module=$1
     local branch=$2
 
-    # If microbench version does not exist, try without
-    if [ "${MB}" = "WITH_MICROBENCH" ]; then
-        if ! wget -nv https://openepics.ci.cloudbees.com/job/e4-cpp-${module}-${branch}-build/BASE=${BASE},MB=WITH_MICROBENCH/lastSuccessfulBuild/artifact/${module}.CB-dist.tar.gz; then
-            wget -nv https://openepics.ci.cloudbees.com/job/e4-cpp-${module}-${branch}-build/BASE=${BASE},MB=NO_MICROBENCH/lastSuccessfulBuild/artifact/${module}.CB-dist.tar.gz
-        fi
-    else
-        wget -nv https://openepics.ci.cloudbees.com/job/e4-cpp-${module}-${branch}-build/BASE=${BASE},MB=NO_MICROBENCH/lastSuccessfulBuild/artifact/${module}.CB-dist.tar.gz
-    fi
+    wget -nv https://openepics.ci.cloudbees.com/job/e4-cpp-${module}-${branch}-build/BASE=${BASE}/lastSuccessfulBuild/artifact/${module}.CB-dist.tar.gz
     tar -xzf ${module}.CB-dist.tar.gz
 }
 

src/Makefile

@@ -6,12 +6,13 @@ include $(TOP)/configure/CONFIG
 LIBRARY += pvaClient
 
 # shared library ABI version.
-SHRLIB_VERSION ?= 4.2.0
+SHRLIB_VERSION ?= $(EPICS_PVACLIENT_MAJOR_VERSION).$(EPICS_PVACLIENT_MINOR_VERSION).$(EPICS_PVACLIENT_MAINTENANCE_VERSION)
 
 INC += pv/pvaClient.h
 INC += pv/pvaClientMultiChannel.h
 
 LIBSRCS += pvaClient.cpp
+LIBSRCS += pvaClientData.cpp
 LIBSRCS += pvaClientPutData.cpp
 LIBSRCS += pvaClientGetData.cpp
 LIBSRCS += pvaClientMonitorData.cpp
@@ -31,8 +32,8 @@ LIBSRCS += pvaClientNTMultiGet.cpp
 LIBSRCS += pvaClientNTMultiMonitor.cpp
 LIBSRCS += pvaClientRPC.cpp
 
-pvaClient_LIBS += pvAccess nt pvData Com
-pvaClient_LIBS +=  $(EPICS_BASE_IOC_LIBS)
+pvaClient_LIBS += nt
+pvaClient_LIBS += $(EPICS_BASE_PVA_CORE_LIBS)
+pvaClient_LIBS += $(EPICS_BASE_IOC_LIBS)
 
 include $(TOP)/configure/RULES
-

src/pv/pvaClientMultiChannel.h

@@ -145,10 +145,6 @@ public:
      */
     PvaClientNTMultiMonitorPtr createNTMonitor(
         std::string const &request= "field(value,alarm,timeStamp)");
-     /** Deprecated method
-     * \deprecated This method will go away in future versions. 
-     */
-    void destroy()  EPICS_DEPRECATED {}
 private:
     PvaClientMultiChannel(
         PvaClientPtr const &pvaClient,
@@ -209,10 +205,6 @@ public:
     {
         return shared_from_this();
     }
-    /** Deprecated method
-     * \deprecated This method will go away in future versions. 
-     */
-    void destroy()  EPICS_DEPRECATED {}
 private:
     PvaClientMultiGetDouble(
          PvaClientMultiChannelPtr const &pvaClientMultiChannel,
@@ -262,10 +254,6 @@ public:
     {
         return shared_from_this();
     }
-    /** Deprecated method
-     * \deprecated This method will go away in future versions. 
-     */
-    void destroy()  EPICS_DEPRECATED {}
 private:
     PvaClientMultiPutDouble(
          PvaClientMultiChannelPtr const &pvaClientMultiChannel,
@@ -329,10 +317,6 @@ public:
     {
         return shared_from_this();
     }
-    /** Deprecated method
-     * \deprecated This method will go away in future versions. 
-     */
-    void destroy()  EPICS_DEPRECATED {}
 private:
     PvaClientMultiMonitorDouble(
          PvaClientMultiChannelPtr const &pvaClientMultiChannel,
@@ -376,8 +360,10 @@ public:
     void connect();
     /**
      * @brief Get each channel.
+     *
+     * @param valueOnly use only value for union.
      */
-    void get();
+    void get(bool valueOnly = true);
     /**
      * @brief Get the data from the last get.
      * @return the pvaClientNTMultiData.
@@ -390,10 +376,6 @@ public:
     {
         return shared_from_this();
     }
-    /** Deprecated method
-     * \deprecated This method will go away in future versions. 
-     */
-    void destroy()  EPICS_DEPRECATED {}
 private:
     PvaClientNTMultiGet(
          epics::pvData::UnionConstPtr const & u,
@@ -453,10 +435,6 @@ public:
     {
         return shared_from_this();
     }
-    /** Deprecated method
-     * \deprecated This method will go away in future versions. 
-     */
-    void destroy()  EPICS_DEPRECATED {}
 private:
     PvaClientNTMultiPut(
          PvaClientMultiChannelPtr const &pvaClientMultiChannel,
@@ -500,10 +478,11 @@ public:
      /**
      * @brief Poll each channel.
      *
+     * @param valueOnly use only value for union.
      * If any has new data it is used to update the double[].
      * @return (false,true) if (no, at least one) value was updated.
      */
-    bool poll();
+    bool poll(bool valueOnly = true);
     /**
      * @brief Wait until poll returns true.
      * @param secondsToWait The time to keep trying.
@@ -523,10 +502,6 @@ public:
     {
         return shared_from_this();
     }
-    /** Deprecated method
-     * \deprecated This method will go away in future versions. 
-     */
-    void destroy()  EPICS_DEPRECATED {}
 private:
     PvaClientNTMultiMonitor(
          epics::pvData::UnionConstPtr const & u,
@@ -579,11 +554,12 @@ public:
      * @brief Set the timeStamp base for computing deltaTimes. 
      */
     void startDeltaTime();
-   
     /**
      * @brief Update NTMultiChannel fields.
+     *
+     * @param valueOnly use only value for union.
      */
-    void endDeltaTime();
+    void endDeltaTime(bool valueOnly = true);
     /**
      * @brief Get the time when the last get was made.
      * @return The timeStamp.
@@ -601,17 +577,12 @@ public:
     {
         return shared_from_this();
     }
-    /** Deprecated method
-     * \deprecated This method will go away in future versions. 
-     */
-    void destroy()  EPICS_DEPRECATED {}
 private:
     PvaClientNTMultiData(
          epics::pvData::UnionConstPtr const & u,
          PvaClientMultiChannelPtr const &pvaNTMultiChannel,
          PvaClientChannelArray const &pvaClientChannelArray,
          epics::pvData::PVStructurePtr const &  pvRequest);
-    void setStructure(epics::pvData::StructureConstPtr const & structure,size_t index);
     void setPVStructure(
         epics::pvData::PVStructurePtr const &pvStructure,size_t index);
 

src/pvaClient.cpp

@@ -18,7 +18,6 @@
 
 #include <pv/pvaClient.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace epics::pvAccess::ca;
@@ -87,7 +86,18 @@ size_t PvaClientChannelCache::cacheSize()
 
 }
 
-bool PvaClient::debug = false;
+// MSVC doesn't like making this a class static data member:
+static bool debug = 0;
+
+void PvaClient::setDebug(bool value)
+{
+    debug = value;
+}
+
+bool PvaClient::getDebug()
+{
+    return debug;
+}
 
 PvaClientPtr PvaClient::get(std::string const & providerNames)
 {
@@ -100,47 +110,58 @@ PvaClientPtr PvaClient::get(std::string const & providerNames)
     return master;
 }
 
+PvaClientPtr PvaClient::create() {return get();}
 
 PvaClient::PvaClient(std::string const & providerNames)
 :  pvaClientChannelCache(new PvaClientChannelCache()),
    pvaStarted(false),
-   caStarted(false)
+   caStarted(false),
+   channelRegistry(ChannelProviderRegistry::clients())
 {
     stringstream ss(providerNames);
     string providerName;
+    if(getDebug()) {
+         cout<< "PvaClient::PvaClient()\n";
+    }
     while (getline(ss, providerName, ' '))
     {
-         ChannelProviderRegistry::shared_pointer registry(getChannelProviderRegistry());
          if(providerName=="pva") {
+             if(getDebug()) {
+                  cout<< "calling ClientFactory::start()\n";
+              }
              ClientFactory::start();
              pvaStarted = true;
          } else if(providerName=="ca") {
+             if(getDebug()) {
+                  cout<< "calling CAClientFactory::start()\n";
+              }
              CAClientFactory::start();
              caStarted = true;
-         } else {
-             if(!registry->getProvider(providerName)) {
-                  cerr << "PvaClient::get provider " << providerName  << " not known" << endl;
+         } else { 
+             if(!channelRegistry->getProvider(providerName)) {
+                 cerr << "PvaClient::get provider " << providerName  << " not known" << endl;
              }
          }
     }
 }
 
 PvaClient::~PvaClient() {
-    if(PvaClient::debug) {
+    if(getDebug()) {
         cout<< "PvaClient::~PvaClient()\n"
             << "pvaChannel cache:\n";
         showCache();
     }
     if(pvaStarted){
-        if(PvaClient::debug) cout<< "calling ClientFactory::stop()\n";
+        if(getDebug()) cout<< "calling ClientFactory::stop()\n";
         ClientFactory::stop();
-        if(PvaClient::debug) cout<< "after calling ClientFactory::stop()\n";
+        if(getDebug()) cout<< "after calling ClientFactory::stop()\n";
     }
     if(caStarted) {
-        if(PvaClient::debug) cout<< "calling CAClientFactory::stop()\n";
+        if(getDebug()) cout<< "calling CAClientFactory::stop()\n";
         CAClientFactory::stop();
-        if(PvaClient::debug) cout<< "after calling CAClientFactory::stop()\n";
+        if(getDebug()) cout<< "after calling CAClientFactory::stop()\n";
     }
+channelRegistry.reset();
 }
 
 string PvaClient:: getRequesterName()
@@ -210,4 +231,4 @@ size_t PvaClient::cacheSize()
 }
 
 }}
-
+ 

src/pvaClientChannel.cpp

@@ -18,7 +18,6 @@
 
 #include <pv/pvaClient.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace std;
@@ -122,60 +121,12 @@ size_t PvaClientPutCache::cacheSize()
 
 }
 
-class epicsShareClass ChannelRequesterImpl : public ChannelRequester
-{
-    PvaClientChannel::weak_pointer pvaClientChannel;
-    PvaClient::weak_pointer pvaClient;
-public:
-    ChannelRequesterImpl(
-        PvaClientChannelPtr const & pvaClientChannel,
-        PvaClientPtr const &pvaClient)
-    : pvaClientChannel(pvaClientChannel),
-      pvaClient(pvaClient)
-    {}
-    virtual ~ChannelRequesterImpl() {
-        if(PvaClient::getDebug()) std::cout << "~ChannelRequesterImpl" << std::endl;
-    }
-
-    virtual std::string getRequesterName() {
-        PvaClientChannelPtr clientChannel(pvaClientChannel.lock());
-        if(!clientChannel) return string("clientChannel is null");
-        return clientChannel->getRequesterName();
-    }
-
-    virtual void message(std::string const & message, epics::pvData::MessageType messageType) {
-        PvaClientChannelPtr clientChannel(pvaClientChannel.lock());
-        if(!clientChannel) return;
-        clientChannel->message(message,messageType);
-    }
-
-    virtual void channelCreated(
-         const epics::pvData::Status& status,
-         Channel::shared_pointer const & channel)
-    {
-        PvaClientChannelPtr clientChannel(pvaClientChannel.lock());
-        if(!clientChannel) return;
-        clientChannel->channelCreated(status,channel);
-    }
-
-    virtual void channelStateChange(
-          Channel::shared_pointer const & channel,
-          Channel::ConnectionState connectionState)
-    {
-        PvaClientChannelPtr clientChannel(pvaClientChannel.lock());
-        if(!clientChannel) return;
-        clientChannel->channelStateChange(channel,connectionState);
-    }
-};
-
 PvaClientChannelPtr PvaClientChannel::create(
    PvaClientPtr const &pvaClient,
    string const & channelName,
    string const & providerName)
 {
     PvaClientChannelPtr channel(new PvaClientChannel(pvaClient,channelName,providerName));
-    channel->channelRequester = ChannelRequesterImplPtr(
-        new ChannelRequesterImpl(channel,pvaClient));
     return channel;
 }
 
@@ -218,6 +169,7 @@ void PvaClientChannel::channelCreated(const Status& status, Channel::shared_poin
            << endl;
     }
     Lock xx(mutex);
+    this->channel = channel;
     if(connectState==connected) return;
     if(connectState!=connectActive) {
          string message("PvaClientChannel::channelCreated");
@@ -246,25 +198,28 @@ void PvaClientChannel::channelStateChange(
         << " " << Channel::ConnectionStateNames[connectionState]
         << endl;
     }
+    bool waitingForConnect = false;
+    if(connectState==connectActive) waitingForConnect = true;
+    if(connectionState!=Channel::CONNECTED) {
+        Lock xx(mutex);
+        string mess(channelName +
+                " connection state " + Channel::ConnectionStateNames[connectionState]);
+        message(mess,errorMessage);
+        connectState = notConnected;
+    } else {
+        Lock xx(mutex);
+        this->channel = channel;
+        connectState = connected;
+    }
+    if(waitingForConnect) {
+         Lock xx(mutex);
+         waitForConnect.signal();
+    }
     PvaClientChannelStateChangeRequesterPtr req(stateChangeRequester.lock());
     if(req) {
          bool value = (connectionState==Channel::CONNECTED ? true :  false);
          req->channelStateChange(shared_from_this(),value);
     }
-   
-    Lock xx(mutex);
-    bool waitingForConnect = false;
-    if(connectState==connectActive) waitingForConnect = true;
-    if(connectionState!=Channel::CONNECTED) {
-         string mess(channelName +
-             " connection state " + Channel::ConnectionStateNames[connectionState]);
-             message(mess,errorMessage);
-             connectState = notConnected;
-         return;
-    } else {
-        connectState = connected;
-    }
-    if(waitingForConnect) waitForConnect.signal();
 }
 
 string PvaClientChannel::getRequesterName()
@@ -297,6 +252,9 @@ void PvaClientChannel::setStateChangeRequester(
     PvaClientChannelStateChangeRequesterPtr const & stateChangeRequester)
 {
     this->stateChangeRequester = stateChangeRequester;
+    bool isConnected = false;
+    if(channel) isConnected = channel->isConnected();
+    stateChangeRequester->channelStateChange(shared_from_this(),isConnected);
 }
 
 void PvaClientChannel::connect(double timeout)
@@ -328,13 +286,13 @@ void PvaClientChannel::issueConnect()
         }
         connectState = connectActive;
     }
-    ChannelProviderRegistry::shared_pointer reg = getChannelProviderRegistry();
-    ChannelProvider::shared_pointer provider = reg->getProvider(providerName);
-    if(!provider) {
+    ChannelProviderRegistry::shared_pointer reg(ChannelProviderRegistry::clients());
+    channelProvider = reg->getProvider(providerName);
+    if(!channelProvider) {
         throw std::runtime_error(channelName + " provider " + providerName + " not registered");
     }
     if(PvaClient::getDebug()) cout << "PvaClientChannel::issueConnect calling provider->createChannel\n";
-    channel = provider->createChannel(channelName,channelRequester,ChannelProvider::PRIORITY_DEFAULT);
+    channel = channelProvider->createChannel(channelName,shared_from_this(),ChannelProvider::PRIORITY_DEFAULT);
     if(!channel) {
          throw std::runtime_error(channelName + " channelCreate failed ");
     }
@@ -348,6 +306,7 @@ Status PvaClientChannel::waitConnect(double timeout)
     }
     {
         Lock xx(mutex);
+        if(!channel) return Status(Status::STATUSTYPE_ERROR,"");
         if(channel->isConnected()) return Status::Ok;
     }
     if(timeout>0.0) {
@@ -355,8 +314,9 @@ Status PvaClientChannel::waitConnect(double timeout)
     } else {
         waitForConnect.wait();
     }
+    if(!channel) return Status(Status::STATUSTYPE_ERROR,"pvaClientChannel::waitConnect channel is null");
     if(channel->isConnected()) return Status::Ok;
-    return Status(Status::STATUSTYPE_ERROR,channelName + " not connected");
+    return Status(Status::STATUSTYPE_ERROR," not connected");
 }
 
 
@@ -383,17 +343,19 @@ PvaClientProcessPtr PvaClientChannel::createProcess(PVStructurePtr const &  pvRe
     if(connectState!=connected) connect(5.0);
     PvaClientPtr yyy = pvaClient.lock();
     if(!yyy) throw std::runtime_error("PvaClient was destroyed");
-    return PvaClientProcess::create(yyy,channel,pvRequest);
+    return PvaClientProcess::create(yyy,shared_from_this(),pvRequest);
 }
 
 
 PvaClientGetPtr PvaClientChannel::get(string const & request)
 {
     PvaClientGetPtr pvaClientGet = pvaClientGetCache->getGet(request);
-    if(pvaClientGet) return pvaClientGet;
-    pvaClientGet = createGet(request);
-    pvaClientGet->connect();
-    pvaClientGetCache->addGet(request,pvaClientGet);
+    if(!pvaClientGet) {
+        pvaClientGet = createGet(request);
+        pvaClientGet->connect();
+        pvaClientGetCache->addGet(request,pvaClientGet);
+    }
+    pvaClientGet->get();
     return pvaClientGet;
 }
 
@@ -415,7 +377,27 @@ PvaClientGetPtr PvaClientChannel::createGet(PVStructurePtr const &  pvRequest)
     if(connectState!=connected) connect(5.0);
     PvaClientPtr yyy = pvaClient.lock();
     if(!yyy) throw std::runtime_error("PvaClient was destroyed");
-    return PvaClientGet::create(yyy,channel,pvRequest);
+    return PvaClientGet::create(yyy,shared_from_this(),pvRequest);
+}
+
+double PvaClientChannel::getDouble(string const & request)
+{
+     return get(request)->getData()->getDouble();
+}
+
+string PvaClientChannel::getString(string const & request)
+{
+    return get(request)->getData()->getString();
+}
+
+shared_vector<const double>  PvaClientChannel::getDoubleArray(string const & request)
+{
+    return get(request)->getData()->getDoubleArray();
+}
+
+shared_vector<const std::string>  PvaClientChannel::getStringArray(string const & request)
+{
+    return get(request)->getData()->getStringArray();
 }
 
 
@@ -423,10 +405,12 @@ PvaClientPutPtr PvaClientChannel::put(string const & request)
 {
     PvaClientPutPtr pvaClientPut = pvaClientPutCache->getPut(request);
     if(pvaClientPut) return pvaClientPut;
-    pvaClientPut = createPut(request);
-    pvaClientPut->connect();
-    pvaClientPut->get();
-    pvaClientPutCache->addPut(request,pvaClientPut);
+    if(!pvaClientPut) {
+        pvaClientPut = createPut(request);
+        pvaClientPut->connect();
+        pvaClientPut->get();
+        pvaClientPutCache->addPut(request,pvaClientPut);
+    }
     return pvaClientPut;
 }
 
@@ -448,7 +432,45 @@ PvaClientPutPtr PvaClientChannel::createPut(PVStructurePtr const & pvRequest)
     if(connectState!=connected) connect(5.0);
     PvaClientPtr yyy = pvaClient.lock();
     if(!yyy) throw std::runtime_error("PvaClient was destroyed");
-    return PvaClientPut::create(yyy,channel,pvRequest);
+    return PvaClientPut::create(yyy,shared_from_this(),pvRequest);
+}
+
+void PvaClientChannel::putDouble(double value,string const & request)
+{
+    PvaClientPutPtr clientPut = put(request);
+    PvaClientPutDataPtr putData = clientPut->getData();
+    putData->putDouble(value); clientPut->put();
+}
+
+void PvaClientChannel::putString(std::string const & value,string const & request)
+{
+    PvaClientPutPtr clientPut = put(request);
+    PvaClientPutDataPtr putData = clientPut->getData();
+    putData->putString(value); clientPut->put();
+}
+
+void PvaClientChannel::putDoubleArray(
+    shared_vector<const double> const & value,
+    string const & request)
+{
+    PvaClientPutPtr clientPut = put(request);
+    PvaClientPutDataPtr putData = clientPut->getData();
+    size_t n = value.size();
+    shared_vector<double> valueArray(n);
+    for(size_t i=0; i<n; ++i) valueArray[i] = value[i];
+    putData->putDoubleArray(freeze(valueArray)); clientPut->put();
+}
+
+void PvaClientChannel::putStringArray(
+    shared_vector<const string> const & value,
+    string const & request)
+{
+    PvaClientPutPtr clientPut = put(request);
+    PvaClientPutDataPtr putData = clientPut->getData();
+    size_t n = value.size();
+    shared_vector<string> valueArray(n);
+    for(size_t i=0; i<n; ++i) valueArray[i] = value[i];
+    putData->putStringArray(freeze(valueArray)); clientPut->put();
 }
 
 PvaClientPutGetPtr PvaClientChannel::createPutGet(string const & request)
@@ -468,7 +490,7 @@ PvaClientPutGetPtr PvaClientChannel::createPutGet(PVStructurePtr const & pvReque
     if(connectState!=connected) connect(5.0);
     PvaClientPtr yyy = pvaClient.lock();
     if(!yyy) throw std::runtime_error("PvaClient was destroyed");
-    return PvaClientPutGet::create(yyy,channel,pvRequest);
+    return PvaClientPutGet::create(yyy,shared_from_this(),pvRequest);
 }
 
 
@@ -532,7 +554,7 @@ PvaClientMonitorPtr  PvaClientChannel::createMonitor(PVStructurePtr const &  pvR
     if(connectState!=connected) connect(5.0);
     PvaClientPtr yyy = pvaClient.lock();
     if(!yyy) throw std::runtime_error("PvaClient was destroyed");
-    return PvaClientMonitor::create(yyy,channel,pvRequest);
+    return PvaClientMonitor::create(yyy,shared_from_this(),pvRequest);
 }
 
 PVStructurePtr PvaClientChannel::rpc(

src/pvaClientData.cpp

@@ -0,0 +1,508 @@
+/* pvaClientData.cpp */
+/**
+ * Copyright - See the COPYRIGHT that is included with this distribution.
+ * EPICS pvData is distributed subject to a Software License Agreement found
+ * in file LICENSE that is included with this distribution.
+ */
+/**
+ * @author mrk
+ * @date 2019.04
+ */
+
+#include <typeinfo>
+#include <sstream>
+#include <istream>
+#include <ostream>
+
+#include <pv/createRequest.h>
+#include <pv/convert.h>
+#include <pv/pvEnumerated.h>
+
+#if EPICS_VERSION_INT>=VERSION_INT(3,15,0,1)
+#  include <pv/json.h>
+#  define USE_JSON
+#endif
+
+#define epicsExportSharedSymbols
+
+#include <pv/pvaClient.h>
+
+using std::tr1::static_pointer_cast;
+using namespace epics::pvData;
+using namespace epics::pvAccess;
+using namespace std;
+
+namespace epics { namespace pvaClient {
+
+
+typedef std::tr1::shared_ptr<PVArray> PVArrayPtr;
+static ConvertPtr convert = getConvert();
+static string noStructure("no pvStructure ");
+static string noValue("no value field");
+static string noScalar("value is not a scalar");
+static string noArray("value is not an array");
+static string noScalarArray("value is not a scalarArray");
+static string noAlarm("no alarm");
+static string noTimeStamp("no timeStamp");
+
+PvaClientDataPtr PvaClientData::create(StructureConstPtr const & structure)
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::create\n";
+    PvaClientDataPtr epv(new PvaClientData(structure));
+    return epv;
+}
+
+PvaClientData::PvaClientData(StructureConstPtr const & structure)
+: structure(structure)
+{
+}
+
+void PvaClientData::checkValue()
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::checkValue\n";
+    if(pvValue) return;
+    throw std::runtime_error(messagePrefix + noValue);
+}
+
+void PvaClientData::setMessagePrefix(std::string const & value)
+{
+    messagePrefix = value + " ";
+}
+
+StructureConstPtr PvaClientData::getStructure()
+{
+    return structure;
+}
+
+PVStructurePtr PvaClientData::getPVStructure()
+{
+    if(pvStructure) return pvStructure;
+    throw std::runtime_error(messagePrefix + noStructure);
+}
+
+BitSetPtr PvaClientData::getChangedBitSet()
+{
+    if(bitSet)return bitSet;
+    throw std::runtime_error(messagePrefix + noStructure);
+}
+
+std::ostream & PvaClientData::showChanged(std::ostream & out)
+{
+    if(!bitSet) throw std::runtime_error(messagePrefix + noStructure);
+    size_t nextSet = bitSet->nextSetBit(0);
+    PVFieldPtr pvField;
+    while(nextSet!=string::npos) {
+        if(nextSet==0) {
+             pvField = pvStructure;
+        } else {
+              pvField = pvStructure->getSubField(nextSet);
+        }
+        string name = pvField->getFullName();
+        out << name << " = " << pvField << endl;
+        nextSet = bitSet->nextSetBit(nextSet+1);
+    }
+    return out;
+}
+
+void PvaClientData::setData(
+    PVStructurePtr const & pvStructureFrom,
+    BitSetPtr const & bitSetFrom)
+{
+   if(PvaClient::getDebug()) cout << "PvaClientData::setData\n";
+   pvStructure = pvStructureFrom;
+   bitSet = bitSetFrom;
+   pvValue = pvStructure->getSubField("value");
+}
+
+
+bool PvaClientData::hasValue()
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::hasValue\n";
+    if(!pvValue) return false;
+    return true;
+}
+
+bool PvaClientData::isValueScalar()
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::isValueScalar\n";
+    if(!pvValue) return false;
+    if(pvValue->getField()->getType()==scalar) return true;
+    return false;
+}
+
+bool PvaClientData::isValueScalarArray()
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::isValueScalarArray\n";
+    if(!pvValue) return false;
+    if(pvValue->getField()->getType()==scalarArray) return true;
+    return false;
+}
+
+PVFieldPtr  PvaClientData::getValue()
+{
+   if(PvaClient::getDebug()) cout << "PvaClientData::getValue\n";
+   checkValue();
+   return pvValue;
+}
+
+PVScalarPtr  PvaClientData::getScalarValue()
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::getScalarValue\n";
+    checkValue();
+    if(pvValue->getField()->getType()!=scalar) {
+       throw std::runtime_error(messagePrefix + noScalar);
+    }
+    return pvStructure->getSubField<PVScalar>("value");
+}
+
+PVArrayPtr  PvaClientData::getArrayValue()
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::getArrayValue\n";
+    checkValue();
+    Type type = pvValue->getField()->getType();
+    if(type!=scalarArray && type!=structureArray && type!=unionArray) {
+        throw std::runtime_error(messagePrefix + noArray);
+    }
+    return pvStructure->getSubField<PVArray>("value");
+}
+
+PVScalarArrayPtr  PvaClientData::getScalarArrayValue()
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::getScalarArrayValue\n";
+    checkValue();
+    Type type = pvValue->getField()->getType();
+    if(type!=scalarArray) {
+        throw std::runtime_error(messagePrefix + noScalarArray);
+    }
+    return pvStructure->getSubField<PVScalarArray>("value");
+}
+
+double PvaClientData::getDouble()
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::getDouble\n";
+    PVScalarPtr pvScalar;
+    PVStructurePtr pvStructure = getPVStructure();
+    PVFieldPtr pvValue  = pvStructure->getSubField("value");
+    if(pvValue) {
+        Type type = pvValue->getField()->getType();
+        if(type==scalar) pvScalar = static_pointer_cast<PVScalar>(pvValue);
+    }
+    if(!pvScalar) {
+        while(true) {
+             const PVFieldPtrArray fieldPtrArray(pvStructure->getPVFields());
+             if(fieldPtrArray.size()!=1) {
+                  throw std::logic_error(
+                      "PvaClientData::getDouble() pvRequest for multiple fields");
+             }
+             PVFieldPtr pvField(fieldPtrArray[0]);
+             Type type = pvField->getField()->getType();
+             if(type==scalar) {
+                 pvScalar = static_pointer_cast<PVScalar>(pvField);
+                 break;
+             }
+             if(pvField->getField()->getType()!=epics::pvData::structure) break;
+             pvStructure = static_pointer_cast<PVStructure>(pvField);
+        }
+    }
+    if(!pvScalar) {
+        throw std::logic_error(
+            "PvaClientData::getDouble() did not find a scalar field");
+    }
+    ScalarType scalarType = pvScalar->getScalar()->getScalarType();
+    if(scalarType==pvDouble) {
+        PVDoublePtr pvDouble = static_pointer_cast<PVDouble>(pvScalar);
+        return pvDouble->get();
+    }
+    if(!ScalarTypeFunc::isNumeric(scalarType)) {
+        throw std::logic_error(
+            "PvaClientData::getDouble() did not find a numeric scalar field");
+    }
+    return convert->toDouble(pvScalar);
+}
+
+string PvaClientData::getString()
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::getString\n";
+    PVScalarPtr pvScalar;
+    PVStructurePtr pvStructure = getPVStructure();
+    PVFieldPtr pvValue  = pvStructure->getSubField("value");
+    if(pvValue) {
+        Type type = pvValue->getField()->getType();
+        if(type==scalar) pvScalar = static_pointer_cast<PVScalar>(pvValue);
+    }
+    if(!pvScalar) {
+        while(true) {
+             const PVFieldPtrArray fieldPtrArray(pvStructure->getPVFields());
+             if(fieldPtrArray.size()!=1) {
+                  throw std::logic_error(
+                      "PvaClientData::getString() pvRequest for multiple fields");
+             }
+             PVFieldPtr pvField(fieldPtrArray[0]);
+             Type type = pvField->getField()->getType();
+             if(type==scalar) {
+                 pvScalar = static_pointer_cast<PVScalar>(pvField);
+                 break;
+             }
+             if(pvField->getField()->getType()!=epics::pvData::structure) break;
+             pvStructure = static_pointer_cast<PVStructure>(pvField);
+        }
+    }
+    if(!pvScalar) {
+        throw std::logic_error(
+            "PvaClientData::getString() did not find a scalar field");
+    }
+    return convert->toString(pvScalar);
+}
+
+shared_vector<const double> PvaClientData::getDoubleArray()
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::getDoubleArray\n";
+    PVScalarArrayPtr pvScalarArray;
+    PVStructurePtr pvStructure = getPVStructure();
+    PVFieldPtr pvValue  = pvStructure->getSubField("value");
+    if(pvValue) {
+        Type type = pvValue->getField()->getType();
+        if(type==scalarArray) {
+            pvScalarArray = static_pointer_cast<PVScalarArray>(pvValue);
+        }
+    }
+    if(!pvScalarArray) {
+        while(true) {
+             const PVFieldPtrArray fieldPtrArray(pvStructure->getPVFields());
+             if(fieldPtrArray.size()!=1) {
+                  throw std::logic_error(
+                      "PvaClientData::getDoubleArray() pvRequest for multiple fields");
+             }
+             PVFieldPtr pvField(fieldPtrArray[0]);
+             Type type = pvField->getField()->getType();
+             if(type==scalarArray) {
+                 pvScalarArray = static_pointer_cast<PVScalarArray>(pvField);
+                 break;
+             }
+             if(pvField->getField()->getType()!=epics::pvData::structure) break;
+             pvStructure = static_pointer_cast<PVStructure>(pvField);
+        }
+    }
+    if(!pvScalarArray) {
+        throw std::logic_error(
+            "PvaClientData::getDoubleArray() did not find a scalarArray field");
+    }
+    ScalarType scalarType = pvScalarArray->getScalarArray()->getElementType();
+    if(!ScalarTypeFunc::isNumeric(scalarType)) {
+        throw std::logic_error(
+            "PvaClientData::getDoubleArray() did not find a numeric scalarArray field");
+    }
+    shared_vector<const double> retValue;
+    pvScalarArray->getAs<const double>(retValue);
+    return retValue;
+}
+
+shared_vector<const string> PvaClientData::getStringArray()
+{
+    if(PvaClient::getDebug()) cout << "PvaClientData::getStringArray\n";
+    PVScalarArrayPtr pvScalarArray;
+    PVStructurePtr pvStructure = getPVStructure();
+    PVFieldPtr pvValue  = pvStructure->getSubField("value");
+    if(pvValue) {
+       Type type = pvValue->getField()->getType();
+        if(type==scalarArray) {
+             pvScalarArray = static_pointer_cast<PVScalarArray>(pvValue);
+        }
+    }
+    if(!pvScalarArray) {
+        while(true) {
+             const PVFieldPtrArray fieldPtrArray(pvStructure->getPVFields());
+             if(fieldPtrArray.size()!=1) {
+                  throw std::logic_error(
+                      "PvaClientData::getStringArray() pvRequest for multiple fields");
+             }
+             PVFieldPtr pvField(fieldPtrArray[0]);
+             Type type = pvField->getField()->getType();
+             if(type==scalarArray) {
+                 pvScalarArray = static_pointer_cast<PVScalarArray>(pvField);
+                 break;
+             }
+             if(pvField->getField()->getType()!=epics::pvData::structure) break;
+             pvStructure = static_pointer_cast<PVStructure>(pvField);
+        }
+    }
+    if(!pvScalarArray) {
+        throw std::logic_error(
+            "PvaClientData::getStringArray() did not find a scalarArray field");
+    }
+    shared_vector<const string> retValue;
+    pvScalarArray->getAs<const string>(retValue);
+    return retValue;
+}
+
+Alarm PvaClientData::getAlarm()
+{
+   if(PvaClient::getDebug()) cout << "PvaClientData::getAlarm\n";
+   if(!pvStructure) throw new std::runtime_error(messagePrefix + noStructure);
+   PVStructurePtr pvs = pvStructure->getSubField<PVStructure>("alarm");
+   if(!pvs) throw std::runtime_error(messagePrefix + noAlarm);
+   pvAlarm.attach(pvs);
+   if(pvAlarm.isAttached()) {
+       Alarm alarm;
+       pvAlarm.get(alarm);
+       pvAlarm.detach();
+       return alarm;
+   }
+   throw std::runtime_error(messagePrefix + noAlarm);
+}
+
+TimeStamp PvaClientData::getTimeStamp()
+{
+   if(PvaClient::getDebug()) cout << "PvaClientData::getTimeStamp\n";
+   if(!pvStructure) throw new std::runtime_error(messagePrefix + noStructure);
+   PVStructurePtr pvs = pvStructure->getSubField<PVStructure>("timeStamp");
+   if(!pvs) throw std::runtime_error(messagePrefix + noTimeStamp);
+   pvTimeStamp.attach(pvs);
+   if(pvTimeStamp.isAttached()) {
+       TimeStamp timeStamp;
+       pvTimeStamp.get(timeStamp);
+       pvTimeStamp.detach();
+       return timeStamp;
+   }
+   throw std::runtime_error(messagePrefix + noTimeStamp);
+}
+
+void PvaClientData::zeroArrayLength()
+{
+    if(!pvStructure) throw new std::runtime_error(messagePrefix + noStructure);
+    zeroArrayLength(pvStructure);
+}
+void PvaClientData::parse(
+    const std::string &arg,const PVFieldPtr &dest,BitSetPtr & bitSet)
+{
+#ifdef USE_JSON
+    std::istringstream strm(arg);
+    parseJSON(strm, dest,&(*bitSet));
+#else
+    throw std::runtime_error("JSON support not built");
+#endif
+}
+
+void PvaClientData::parse(
+    const std::string &arg,const PVUnionPtr &pvUnion)
+{
+    if(pvUnion->getUnion()->isVariant()) {
+          throw std::runtime_error(messagePrefix + "varient union not implemented");
+    }
+    size_t iequals = arg.find_first_of('=');
+    string field;
+    string rest;
+    if(iequals==std::string::npos) {
+        string mess(arg);
+        mess += " was expected to start with field=";
+          throw std::runtime_error(messagePrefix + mess);
+    }
+    field = arg.substr(0,iequals);
+    rest = arg.substr(iequals+1);
+    PVFieldPtr pvField(pvUnion->select(field));
+    if(pvField->getField()->getType()==epics::pvData::union_) {
+        PVUnionPtr pvu = static_pointer_cast<PVUnion>(pvField);
+        parse(rest,pvu);
+        return;
+    }
+    BitSetPtr bs;
+    parse(rest,pvField,bs);
+    return;
+}
+
+void PvaClientData::parse(const std::vector<std::string> &args)
+{
+    if(!pvStructure) throw std::runtime_error(messagePrefix + noStructure);
+    if(!bitSet) throw std::runtime_error(messagePrefix + noStructure);
+    size_t num = args.size();
+    if(num<1) throw std::runtime_error(messagePrefix + " no arguments");
+    for(size_t i=0; i<num; ++i)
+    {
+        string val = args[i];
+        size_t iequals = val.find_first_of('=');
+        string field;
+        string rest(val);
+        if(iequals==std::string::npos) {
+           parse(rest,pvStructure,bitSet);
+           continue;
+        }
+        field = val.substr(0,iequals);
+        rest = val.substr(iequals+1);
+        if(field.size()==std::string::npos) {
+           parse(rest,pvStructure,bitSet);
+           continue;
+        } 
+        PVFieldPtr pvField(pvStructure->getSubField(field));
+        if(!pvField) throw std::runtime_error(messagePrefix + field +" does not exist");
+        // look for enumerated structure
+        PVEnumerated pvEnumerated;
+        bool result = pvEnumerated.attach(pvField);
+        if(result) {
+             PVStringArray::const_svector choices(pvEnumerated.getChoices());
+             for(size_t i=0; i<choices.size(); ++i) {
+                  if(choices[i]==rest) {
+                     pvEnumerated.setIndex(i);
+                     return;
+                  }
+             }
+        }
+        // look for union
+        PVUnionPtr pvUnion(pvStructure->getSubField<PVUnion>(field));
+        if(pvUnion) {
+            parse(rest,pvUnion);
+            bitSet->set(pvUnion->getFieldOffset());
+            return;
+        }
+        parse(rest,pvField,bitSet);
+    }
+}
+
+void PvaClientData::streamJSON(
+               std::ostream& strm,
+               bool ignoreUnprintable,
+               bool multiLine)
+{
+#ifdef USE_JSON
+    JSONPrintOptions opts;
+    opts.ignoreUnprintable = ignoreUnprintable;
+    opts.multiLine = multiLine;
+    printJSON(strm,*pvStructure,*bitSet,opts);
+#else
+    throw std::runtime_error("JSON support not built");
+#endif
+}
+
+
+void PvaClientData::zeroArrayLength(const epics::pvData::PVStructurePtr &pvStructure)
+{
+const PVFieldPtrArray pvFields(pvStructure->getPVFields());
+    for(size_t i=0; i<pvFields.size(); ++i) {
+        PVFieldPtr pvField = pvFields[i];
+        Type type(pvField->getField()->getType());
+        switch(type) {
+        case epics::pvData::scalarArray:
+            {
+                PVScalarArrayPtr pvScalarArray = static_pointer_cast<PVScalarArray>(pvField);
+                pvScalarArray->setLength(0);
+            }
+            break;
+        case epics::pvData::structureArray:
+            {
+                PVStructureArrayPtr pvStructureArray = static_pointer_cast<PVStructureArray>(pvField);
+                pvStructureArray->setLength(0);
+            }
+            break;
+        case epics::pvData::structure:
+            {
+                PVStructurePtr pvStructure = static_pointer_cast<PVStructure>(pvField);
+                zeroArrayLength(pvStructure);
+            } 
+            break;
+        default:
+               break;
+        }
+    }
+}
+
+
+}}

src/pvaClientGet.cpp

@@ -15,7 +15,6 @@
 
 #include <pv/pvaClient.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace std;
@@ -73,50 +72,66 @@ public:
 
 PvaClientGetPtr PvaClientGet::create(
         PvaClientPtr const &pvaClient,
-        Channel::shared_pointer const & channel,
+        PvaClientChannelPtr const & pvaClientChannel,
         PVStructurePtr const &pvRequest)
 {
-    PvaClientGetPtr epv(new PvaClientGet(pvaClient,channel,pvRequest));
-    epv->channelGetRequester = ChannelGetRequesterImplPtr(
-        new ChannelGetRequesterImpl(epv,pvaClient));
-    return epv;
+    if(PvaClient::getDebug()) {
+         cout<< "PvaClientGet::create(pvaClient,channelName,pvRequest)\n"
+             << " channelName " <<  pvaClientChannel->getChannel()->getChannelName()
+             << " pvRequest " << pvRequest
+             << endl;
+    }
+    PvaClientGetPtr clientGet(new PvaClientGet(pvaClient,pvaClientChannel,pvRequest));
+    clientGet->channelGetRequester = ChannelGetRequesterImplPtr(
+        new ChannelGetRequesterImpl(clientGet,pvaClient));
+    return clientGet;
 }
 
-
 PvaClientGet::PvaClientGet(
         PvaClientPtr const &pvaClient,
-        Channel::shared_pointer const & channel,
+        PvaClientChannelPtr const & pvaClientChannel,
         PVStructurePtr const &pvRequest)
 : pvaClient(pvaClient),
-  channel(channel),
+  pvaClientChannel(pvaClientChannel),
   pvRequest(pvRequest),
   connectState(connectIdle),
   getState(getIdle)
 {
      if(PvaClient::getDebug()) {
-        cout << "PvaClientGet::PvaClientGet::PvaClientGet"
-           << " channelName " << channel->getChannelName()
-           << endl;
+        cout << "PvaClientGet::PvaClientGet channelName "
+             << pvaClientChannel->getChannel()->getChannelName() << "\n";
     }
 }
 
 PvaClientGet::~PvaClientGet()
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
-         cout<< "PvaClientGet::~PvaClientGet"
-           << " channelName " << channelName
-           << endl;
+        cout<< "PvaClientGet::~PvaClientGet channelName "
+           << pvaClientChannel->getChannel()->getChannelName() << "\n";
     }
-    if(channelGet) channelGet->destroy();
 }
 
-void PvaClientGet::checkGetState()
+
+void PvaClientGet::checkConnectState()
 {
-    if(connectState==connectIdle) connect();
-    if(getState==getIdle) get();
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientGet::checkConnectState channelName "
+           << pvaClientChannel->getChannel()->getChannelName() << "\n";
+    }
+    if(!pvaClientChannel->getChannel()->isConnected()) {
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
+            + " PvaClientGet::checkConnectState channel not connected ";
+        throw std::runtime_error(message);
+    }
+    if(connectState==connectIdle) {
+        connect();
+    }
+    if(connectState==connectActive){
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
+            + " "
+            + channelGetConnectStatus.getMessage();
+        throw std::runtime_error(message);
+    }
 }
 
 // from ChannelGetRequester
@@ -140,24 +155,32 @@ void PvaClientGet::channelGetConnect(
     StructureConstPtr const & structure)
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
-        cout << "PvaClientGet::channelGetConnect"
-           << " channelName " << channelName
+        cout << "PvaClientGet::channelGetConnect channelName "
+           << pvaClientChannel->getChannel()->getChannelName()
            << " status.isOK " << (status.isOK() ? "true" : "false")
-           << endl;
+           << "\n";
     }
     {
         Lock xx(mutex);
-        channelGetConnectStatus = status;
-        connectState = connected;
         this->channelGet = channelGet;
         if(status.isOK()) {
+            channelGetConnectStatus = status;
+            connectState = connected;
             pvaClientData = PvaClientGetData::create(structure);
             pvaClientData->setMessagePrefix(channelGet->getChannel()->getChannelName());
+        } else {
+             stringstream ss;
+             ss << pvRequest;
+             string message = string("\nPvaClientGet::channelGetConnect)")
+               + "\npvRequest\n" + ss.str()
+               + "\nerror\n" + status.getMessage();
+             channelGetConnectStatus = Status(Status::STATUSTYPE_ERROR,message);
         }
     }
+    PvaClientGetRequesterPtr  req(pvaClientGetRequester.lock());
+    if(req) {
+          req->channelGetConnect(status,shared_from_this());
+    }
     waitForConnect.signal();
     
 }
@@ -169,57 +192,62 @@ void PvaClientGet::getDone(
     BitSetPtr const & bitSet)
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
-        cout << "PvaClientGet::getDone"
-           << " channelName " << channelName
+        cout << "PvaClientGet::getDone channelName "
+           << pvaClientChannel->getChannel()->getChannelName()
            << " status.isOK " << (status.isOK() ? "true" : "false")
-           << endl;
+           << "\n";
     }
     {
         Lock xx(mutex);
         channelGetStatus = status;
+        getState = getComplete;
         if(status.isOK()) {
             pvaClientData->setData(pvStructure,bitSet);
         }
     }
+    PvaClientGetRequesterPtr  req(pvaClientGetRequester.lock());
+    if(req) {
+          req->getDone(status,shared_from_this());
+    }
     waitForGet.signal();
 }
 
 void PvaClientGet::connect()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientGet::connect channelName "
+           << pvaClientChannel->getChannel()->getChannelName() << "\n";
+    }
     issueConnect();
     Status status = waitConnect();
     if(status.isOK()) return;
-    Channel::shared_pointer chan(channel.lock());
-    string channelName("disconnected");
-    if(chan) channelName = chan->getChannelName();
-    string message = string("channel ") + channelName 
+    string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
          + " PvaClientGet::connect " + status.getMessage();
     throw std::runtime_error(message);
 }
 
 void PvaClientGet::issueConnect()
 {
-    Channel::shared_pointer chan(channel.lock());
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientGet::issueConnect channelName "
+           << pvaClientChannel->getChannel()->getChannelName() << "\n";
+    }
     if(connectState!=connectIdle) {
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+        string message = string("channel ")  + pvaClientChannel->getChannel()->getChannelName()
             + " pvaClientGet already connected ";
         throw std::runtime_error(message);
     }
-    if(chan) {
-        connectState = connectActive;
-        channelGet = chan->createChannelGet(channelGetRequester,pvRequest);
-        return;
-    }
-    throw std::runtime_error("PvaClientGet::issueConnect channel was destroyed");
+    connectState = connectActive;
+    channelGetConnectStatus = Status(Status::STATUSTYPE_ERROR, "connect active");
+    channelGet = pvaClientChannel->getChannel()->createChannelGet(channelGetRequester,pvRequest);
 }
 
 Status PvaClientGet::waitConnect()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientGet::waitConnect channelName "
+           << pvaClientChannel->getChannel()->getChannelName() << "\n";
+    }
     {
         Lock xx(mutex);
         if(connectState==connected) {
@@ -227,10 +255,7 @@ Status PvaClientGet::waitConnect()
              return channelGetConnectStatus;
         }
         if(connectState!=connectActive) {
-            Channel::shared_pointer chan(channel.lock());
-            string channelName("disconnected");
-            if(chan) channelName = chan->getChannelName();
-            string message = string("channel ") + channelName
+            string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
                 + " PvaClientGet::waitConnect illegal connect state ";
             throw std::runtime_error(message);
         }
@@ -242,25 +267,27 @@ Status PvaClientGet::waitConnect()
 
 void PvaClientGet::get()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientGet::get channelName "
+          << pvaClientChannel->getChannel()->getChannelName() << "\n";
+    }
     issueGet();
     Status status = waitGet();
     if(status.isOK()) return;
-    Channel::shared_pointer chan(channel.lock());
-    string channelName("disconnected");
-    if(chan) channelName = chan->getChannelName();
-    string message = string("channel ") + channelName
+    string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientGet::get " + status.getMessage();
     throw std::runtime_error(message);
 }
 
 void PvaClientGet::issueGet()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientGet::issueGet channelName "
+           << pvaClientChannel->getChannel()->getChannelName() << "\n";
+    }
     if(connectState==connectIdle) connect();
-    if(getState!=getIdle) {
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+    if(getState==getActive) {
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientGet::issueGet get aleady active ";
         throw std::runtime_error(message);
     }
@@ -270,30 +297,51 @@ void PvaClientGet::issueGet()
 
 Status PvaClientGet::waitGet()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientGet::waitGet channelName "
+           << pvaClientChannel->getChannel()->getChannelName() << "\n";
+    }
     {
         Lock xx(mutex);
         if(getState==getComplete) {
-            getState =getIdle;
+            getState = getIdle;
             return channelGetStatus;
         }
         if(getState!=getActive){
-            Channel::shared_pointer chan(channel.lock());
-            string channelName("disconnected");
-            if(chan) channelName = chan->getChannelName();
-            string message = string("channel ") + channelName 
+            string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
                 + " PvaClientGet::waitGet llegal get state";
             throw std::runtime_error(message);
         }
     }
     waitForGet.wait();
-    getState = getIdle;
+    getState = getComplete;
     return channelGetStatus;
 }
 PvaClientGetDataPtr PvaClientGet::getData()
 {
-    checkGetState();
+    if(PvaClient::getDebug()) {
+           cout<< "PvaClientGet::getData  channelName "
+               << pvaClientChannel->getChannel()->getChannelName() << "\n";
+    }
+    checkConnectState();
+    if(getState==getIdle) get();
     return pvaClientData;
 }
 
+void PvaClientGet::setRequester(PvaClientGetRequesterPtr const & pvaClientGetRequester)
+{
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientGet::setRequester channelName "
+           << pvaClientChannel->getChannel()->getChannelName() << "\n";
+    }
+    this->pvaClientGetRequester = pvaClientGetRequester;
+}
+
+PvaClientChannelPtr PvaClientGet::getPvaClientChannel()
+{
+    return pvaClientChannel;
+}
+
+
 
 }}

src/pvaClientGetData.cpp

@@ -19,7 +19,6 @@
 
 #include <pv/pvaClient.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace std;
@@ -27,199 +26,15 @@ using namespace std;
 namespace epics { namespace pvaClient {
 
 
-typedef std::tr1::shared_ptr<PVArray> PVArrayPtr;
-static ConvertPtr convert = getConvert();
-static string noStructure("no pvStructure ");
-static string noValue("no value field");
-static string noScalar("value is not a scalar");
-static string notCompatibleScalar("value is not a compatible scalar");
-static string noArray("value is not an array");
-static string noScalarArray("value is not a scalarArray");
-static string notDoubleArray("value is not a doubleArray");
-static string notStringArray("value is not a stringArray");
-static string noAlarm("no alarm");
-static string noTimeStamp("no timeStamp");
-
 PvaClientGetDataPtr PvaClientGetData::create(StructureConstPtr const & structure)
 {
+    if(PvaClient::getDebug()) cout << "PvaClientGetData::create\n";
     PvaClientGetDataPtr epv(new PvaClientGetData(structure));
     return epv;
 }
 
 PvaClientGetData::PvaClientGetData(StructureConstPtr const & structure)
-: structure(structure)
-{
-    messagePrefix = "";
-}
-
-void PvaClientGetData::checkValue()
-{
-    if(pvValue) return;
-    throw std::runtime_error(messagePrefix + noValue);
-}
-
-void PvaClientGetData::setMessagePrefix(std::string const & value)
-{
-    messagePrefix = value + " ";
-}
-
-StructureConstPtr PvaClientGetData::getStructure()
-{return structure;}
-
-PVStructurePtr PvaClientGetData::getPVStructure()
-{
-    if(pvStructure) return pvStructure;
-    throw std::runtime_error(messagePrefix + noStructure);
-}
-
-BitSetPtr PvaClientGetData::getChangedBitSet()
-{
-    if(bitSet)return bitSet;
-    throw std::runtime_error(messagePrefix + noStructure);
-}
-
-std::ostream & PvaClientGetData::showChanged(std::ostream & out)
-{
-    if(!bitSet) throw std::runtime_error(messagePrefix + noStructure);
-    size_t nextSet = bitSet->nextSetBit(0);
-    PVFieldPtr pvField;
-    while(nextSet!=string::npos) {
-        if(nextSet==0) {
-             pvField = pvStructure;
-        } else {
-              pvField = pvStructure->getSubField(nextSet);
-        }
-        string name = pvField->getFullName();
-        out << name << " = " << pvField << endl;
-        nextSet = bitSet->nextSetBit(nextSet+1);
-    }
-    return out;
-}
-
-void PvaClientGetData::setData(
-    PVStructurePtr const & pvStructureFrom,
-    BitSetPtr const & bitSetFrom)
-{
-   pvStructure = pvStructureFrom;
-   bitSet = bitSetFrom;
-   pvValue = pvStructure->getSubField("value");
-}
-
-bool PvaClientGetData::hasValue()
-{
-    if(!pvValue) return false;
-    return true;
-}
-
-bool PvaClientGetData::isValueScalar()
-{
-    if(!pvValue) return false;
-    if(pvValue->getField()->getType()==scalar) return true;
-    return false;
-}
-
-bool PvaClientGetData::isValueScalarArray()
-{
-    if(!pvValue) return false;
-    if(pvValue->getField()->getType()==scalarArray) return true;
-    return false;
-}
-
-PVFieldPtr  PvaClientGetData::getValue()
-{
-   checkValue();
-   return pvValue;
-}
-
-PVScalarPtr  PvaClientGetData::getScalarValue()
-{
-    checkValue();
-    PVScalarPtr pv = pvStructure->getSubField<PVScalar>("value");
-    if(!pv) throw std::runtime_error(messagePrefix + noScalar);
-    return pv;
-}
-
-PVArrayPtr  PvaClientGetData::getArrayValue()
-{
-    checkValue();
-    PVArrayPtr pv = pvStructure->getSubField<PVArray>("value");
-    if(!pv) throw std::runtime_error(messagePrefix + noArray);
-    return pv;
-}
-
-PVScalarArrayPtr  PvaClientGetData::getScalarArrayValue()
-{
-    checkValue();
-    PVScalarArrayPtr pv = pvStructure->getSubField<PVScalarArray>("value");
-    if(!pv) throw std::runtime_error(messagePrefix + noScalarArray);
-    return pv;
-}
-
-double PvaClientGetData::getDouble()
-{
-    PVScalarPtr pvScalar = getScalarValue();
-    ScalarType scalarType = pvScalar->getScalar()->getScalarType();
-    if(scalarType==pvDouble) {
-        PVDoublePtr pvDouble = static_pointer_cast<PVDouble>(pvScalar);
-        return pvDouble->get();
-    }
-    if(!ScalarTypeFunc::isNumeric(scalarType)) {
-        throw std::runtime_error(messagePrefix + notCompatibleScalar);
-    }
-    return convert->toDouble(pvScalar);
-}
-
-string PvaClientGetData::getString()
-{
-    PVScalarPtr pvScalar = getScalarValue();
-    return convert->toString(pvScalar);
-}
-
-shared_vector<const double> PvaClientGetData::getDoubleArray()
-{
-    checkValue();
-    PVDoubleArrayPtr pv = pvStructure->getSubField<PVDoubleArray>("value");
-    if(!pv) throw std::runtime_error(messagePrefix + notDoubleArray);
-    return pv->view();   
-}
-
-shared_vector<const string> PvaClientGetData::getStringArray()
-{
-    checkValue();
-    PVStringArrayPtr pv = pvStructure->getSubField<PVStringArray>("value");
-    if(!pv) throw std::runtime_error(messagePrefix + notStringArray);
-    return pv->view();   
-}
-
-
-Alarm PvaClientGetData::getAlarm()
-{
-   if(!pvStructure) throw new std::runtime_error(messagePrefix + noStructure);
-   PVStructurePtr pvs = pvStructure->getSubField<PVStructure>("alarm");
-   if(!pvs) throw std::runtime_error(messagePrefix + noAlarm);
-   pvAlarm.attach(pvs);
-   if(pvAlarm.isAttached()) {
-       Alarm alarm;
-       pvAlarm.get(alarm);
-       pvAlarm.detach();
-       return alarm;
-   }
-   throw std::runtime_error(messagePrefix + noAlarm);
-}
-
-TimeStamp PvaClientGetData::getTimeStamp()
-{
-   if(!pvStructure) throw new std::runtime_error(messagePrefix + noStructure);
-   PVStructurePtr pvs = pvStructure->getSubField<PVStructure>("timeStamp");
-   if(!pvs) throw std::runtime_error(messagePrefix + noTimeStamp);
-   pvTimeStamp.attach(pvs);
-   if(pvTimeStamp.isAttached()) {
-       TimeStamp timeStamp;
-       pvTimeStamp.get(timeStamp);
-       pvTimeStamp.detach();
-       return timeStamp;
-   }
-   throw std::runtime_error(messagePrefix + noTimeStamp);
-}
+: PvaClientData(structure)
+{}
 
 }}

src/pvaClientMonitor.cpp

@@ -17,8 +17,6 @@
 
 #include <pv/pvaClient.h>
 
-using std::tr1::static_pointer_cast;
-using std::tr1::dynamic_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace std;
@@ -80,21 +78,51 @@ public:
 
 PvaClientMonitorPtr PvaClientMonitor::create(
         PvaClientPtr const &pvaClient,
-        Channel::shared_pointer const & channel,
+        PvaClientChannelPtr const & pvaClientChannel,
         PVStructurePtr const &pvRequest)
 {
-    PvaClientMonitorPtr epv(new PvaClientMonitor(pvaClient,channel,pvRequest));
-    epv->monitorRequester = MonitorRequesterImplPtr(
-        new MonitorRequesterImpl(epv,pvaClient));
-    return epv;
+    PvaClientMonitorPtr clientMonitor(new PvaClientMonitor(pvaClient,pvaClientChannel,pvRequest));
+    clientMonitor->monitorRequester = MonitorRequesterImplPtr(
+        new MonitorRequesterImpl(clientMonitor,pvaClient));
+    return clientMonitor;
 }
 
+PvaClientMonitorPtr PvaClientMonitor::create(
+        PvaClientPtr const &pvaClient,
+        std::string const & channelName,
+        std::string const & providerName,
+        std::string const & request,
+        PvaClientChannelStateChangeRequesterPtr const & stateChangeRequester,
+        PvaClientMonitorRequesterPtr const & monitorRequester)
+{
+    if(PvaClient::getDebug()) {
+         cout<< "PvaClientMonitor::create(pvaClient,channelName,providerName,request,stateChangeRequester,monitorRequester)\n"
+             << " channelName " <<  channelName
+             << " providerName " <<  providerName
+             << " request " << request
+             << endl;
+    }
+    CreateRequest::shared_pointer createRequest(CreateRequest::create());
+    PVStructurePtr pvRequest(createRequest->createRequest(request));
+    if(!pvRequest) throw std::runtime_error(createRequest->getMessage());
+    PvaClientChannelPtr pvaClientChannel = pvaClient->createChannel(channelName,providerName);
+    PvaClientMonitorPtr clientMonitor(new PvaClientMonitor(pvaClient,pvaClientChannel,pvRequest));
+    clientMonitor->monitorRequester = MonitorRequesterImplPtr(
+        new MonitorRequesterImpl(clientMonitor,pvaClient));
+    if(stateChangeRequester) clientMonitor->pvaClientChannelStateChangeRequester = stateChangeRequester;
+    if(monitorRequester) clientMonitor->pvaClientMonitorRequester = monitorRequester;
+    pvaClientChannel->setStateChangeRequester(clientMonitor);
+    pvaClientChannel->issueConnect();
+    return clientMonitor;
+}
+
+
 PvaClientMonitor::PvaClientMonitor(
         PvaClientPtr const &pvaClient,
-        Channel::shared_pointer const & channel,
+        PvaClientChannelPtr const & pvaClientChannel,
         PVStructurePtr const &pvRequest)
 : pvaClient(pvaClient),
-  channel(channel),
+  pvaClientChannel(pvaClientChannel),
   pvRequest(pvRequest),
   isStarted(false),
   connectState(connectIdle),
@@ -102,42 +130,73 @@ PvaClientMonitor::PvaClientMonitor(
   userWait(false)
 {
     if(PvaClient::getDebug()) {
-         cout<< "PvaClientMonitor::PvaClientMonitor()"
-             << " channelName " << channel->getChannelName() 
+         cout<< "PvaClientMonitor::PvaClientMonitor\n"
+             << " channelName " << pvaClientChannel->getChannel()->getChannelName() 
              << endl;
     }
 }
 
 PvaClientMonitor::~PvaClientMonitor()
 {
-    if(PvaClient::getDebug()) cout<< "PvaClientMonitor::~PvaClientMonitor\n";
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout<< "PvaClientMonitor::~PvaClientMonitor"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << endl;
     }
     if(monitor) {
        if(isStarted) monitor->stop();
-       monitor->destroy();
     }
 }
 
+void PvaClientMonitor::channelStateChange(PvaClientChannelPtr const & channel, bool isConnected)
+{
+    if(PvaClient::getDebug()) {
+           cout<< "PvaClientMonitor::channelStateChange"
+               << " channelName " << channel->getChannelName()
+               << " isConnected " << (isConnected ? "true" : "false")
+               << endl;
+    }
+    if(isConnected&&!monitor)
+    {
+        connectState = connectActive;
+        monitor = pvaClientChannel->getChannel()->createMonitor(monitorRequester,pvRequest);
+    }
+    PvaClientChannelStateChangeRequesterPtr req(pvaClientChannelStateChangeRequester.lock());
+    if(req) {
+          req->channelStateChange(channel,isConnected);
+    }
+}
+
+void PvaClientMonitor::event(PvaClientMonitorPtr const & monitor)
+{
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientMonitor::event"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
+    PvaClientMonitorRequesterPtr req(pvaClientMonitorRequester.lock());
+    if(req) req->event(monitor);
+}
+
 void PvaClientMonitor::checkMonitorState()
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientMonitor::checkMonitorState"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << " connectState " << connectState
            << endl;
     }
-    if(connectState==connectIdle) connect();
-    if(connectState==connected && !isStarted) start();
+    if(connectState==connectIdle) {
+         connect();
+         if(!isStarted) start();
+         return;
+    }
+    if(connectState==connectActive){
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
+            + " "
+            + monitorConnectStatus.getMessage();
+        throw std::runtime_error(message);
+    }
 }
 
 string PvaClientMonitor::getRequesterName()
@@ -159,50 +218,63 @@ void PvaClientMonitor::monitorConnect(
     Monitor::shared_pointer const & monitor,
     StructureConstPtr const & structure)
 {
-    Channel::shared_pointer chan(channel.lock());
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientMonitor::monitorConnect"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << " status.isOK " << (status.isOK() ? "true" : "false")
            << endl;
     }
-    connectStatus = status;
+    {
+        Lock xx(mutex);
+        this->monitor = monitor;
+        if(!status.isOK()) {
+             stringstream ss;
+             ss << pvRequest;
+             string message = string("\nPvaClientMonitor::monitorConnect)")
+               + "\npvRequest\n" + ss.str()
+               + "\nerror\n" + status.getMessage();
+             monitorConnectStatus = Status(Status::STATUSTYPE_ERROR,message);
+             return;
+        }
+    }
+    bool signal = (connectState==connectWait) ? true : false;
+    monitorConnectStatus = status;
     connectState = connected;
-    this->monitor = monitor;
     if(isStarted) {
         if(PvaClient::getDebug()) {
-            string channelName("disconnected");
-            Channel::shared_pointer chan(channel.lock());
-            if(chan) channelName = chan->getChannelName();
             cout << "PvaClientMonitor::monitorConnect"
-               << " channelName " << channelName
+               << " channelName " <<  pvaClientChannel->getChannel()->getChannelName()
                << " is already started "
                << endl;
         }
         return;
     }
-    if(status.isOK() && chan) {
-        pvaClientData = PvaClientMonitorData::create(structure);
-        pvaClientData->setMessagePrefix(chan->getChannelName());
+    pvaClientData = PvaClientMonitorData::create(structure);
+    pvaClientData->setMessagePrefix(pvaClientChannel->getChannel()->getChannelName());
+    if(signal) {
+        if(PvaClient::getDebug()) {
+             cout << "PvaClientMonitor::monitorConnect calling waitForConnect.signal\n";
+        }
+        waitForConnect.signal();
+        if(PvaClient::getDebug()) {
+             cout << "PvaClientMonitor::monitorConnect calling start\n";
+        }
+        start();
+    } else {
+        if(PvaClient::getDebug()) {
+             cout << "PvaClientMonitor::monitorConnect calling start\n";
+        }
+        start();
     }
-    if(PvaClient::getDebug()) {
-         cout << "PvaClientMonitor::monitorConnect calling waitForConnect.signal\n";
-    }
-    waitForConnect.signal();
-    
+    PvaClientMonitorRequesterPtr req(pvaClientMonitorRequester.lock());
+    if(req) req->monitorConnect(status,shared_from_this(),structure);
 }
 
 void PvaClientMonitor::monitorEvent(MonitorPtr const & monitor)
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientMonitor::monitorEvent"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << endl;
     }    
     PvaClientMonitorRequesterPtr req = pvaClientMonitorRequester.lock();
@@ -218,10 +290,7 @@ void PvaClientMonitor::unlisten(MonitorPtr const & monitor)
         req->unlisten();
         return;
     }
-    string channelName("disconnected");
-    Channel::shared_pointer chan(channel.lock());
-    if(chan) channelName = chan->getChannelName();
-    cerr << channelName + "pvaClientMonitor::unlisten called but no PvaClientMonitorRequester\n";
+    cerr << pvaClientChannel->getChannel()->getChannelName() + "pvaClientMonitor::unlisten called but no PvaClientMonitorRequester\n";
 }
 
 
@@ -231,11 +300,8 @@ void PvaClientMonitor::connect()
     issueConnect();
     Status status = waitConnect();
     if(status.isOK()) return;
-    Channel::shared_pointer chan(channel.lock());
-    string channelName("disconnected");
-    if(chan) channelName = chan->getChannelName();
     string message = string("channel ") 
-        + channelName
+        + pvaClientChannel->getChannel()->getChannelName()
         + " PvaClientMonitor::connect "
         + status.getMessage();
     throw std::runtime_error(message);
@@ -244,59 +310,50 @@ void PvaClientMonitor::connect()
 void PvaClientMonitor::issueConnect()
 {
     if(PvaClient::getDebug()) cout << "PvaClientMonitor::issueConnect\n";
-    Channel::shared_pointer chan(channel.lock());
     if(connectState!=connectIdle) {
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
         string message = string("channel ")
-            + channelName 
+            + pvaClientChannel->getChannel()->getChannelName()
             + " pvaClientMonitor already connected ";
         throw std::runtime_error(message);
     }
-    if(chan) {
-        connectState = connectActive;
-        monitor = chan->createMonitor(monitorRequester,pvRequest);
-        return;
-    }
-    throw std::runtime_error("PvaClientMonitor::issueConnect() but channel disconnected");
+    connectState = connectWait;
+    monitor = pvaClientChannel->getChannel()->createMonitor(monitorRequester,pvRequest);
 }
 
 Status PvaClientMonitor::waitConnect()
 {
-    if(PvaClient::getDebug()) cout << "PvaClientMonitor::waitConnect\n";
-    if(connectState==connected) {
-         if(!connectStatus.isOK()) connectState = connectIdle;
-         return connectStatus;
-    }
-    if(connectState!=connectActive) {
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ")
-            + channelName
-            + " PvaClientMonitor::waitConnect illegal connect state ";
-        throw std::runtime_error(message);
-    }
     if(PvaClient::getDebug()) {
-        cout << "PvaClientMonitor::waitConnect calling waitForConnect.wait\n";
+       cout << "PvaClientMonitor::waitConnect "
+         << pvaClientChannel->getChannel()->getChannelName()
+         << endl;
+    }
+    {
+        Lock xx(mutex);
+        if(connectState==connected) {
+             if(!monitorConnectStatus.isOK()) connectState = connectIdle;
+             return monitorConnectStatus;
+        }
+        if(connectState!=connectWait) {
+            string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
+                + " PvaClientMonitor::waitConnect illegal connect state ";
+            throw std::runtime_error(message);
+        }
     }
     waitForConnect.wait();
-    connectState = connectStatus.isOK() ? connected : connectIdle;
+    connectState = monitorConnectStatus.isOK() ? connected : connectIdle;
     if(PvaClient::getDebug()) {
         cout << "PvaClientMonitor::waitConnect"
-             << " connectStatus " << (connectStatus.isOK() ? "connected" : "not connected");
+             << " monitorConnectStatus " << (monitorConnectStatus.isOK() ? "connected" : "not connected")
+             << endl;
     }
-    return connectStatus;
+    return monitorConnectStatus;
 }
 
 void PvaClientMonitor::setRequester(PvaClientMonitorRequesterPtr const & pvaClientMonitorRequester)
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientMonitor::setRequester"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << endl;
     }
     this->pvaClientMonitorRequester = pvaClientMonitorRequester;
@@ -305,30 +362,17 @@ void PvaClientMonitor::setRequester(PvaClientMonitorRequesterPtr const & pvaClie
 void PvaClientMonitor::start()
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientMonitor::start"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << " connectState " << connectState
            << endl;
     }
     if(isStarted) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
-        cerr << "PvaClientMonitor::start"
-           << " channelName " << channelName
-           << " why is this called twice "
-           << endl;
         return;
     }
     if(connectState==connectIdle) connect();
     if(connectState!=connected) {
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientMonitor::start illegal state ";
         throw std::runtime_error(message);
     }
@@ -336,15 +380,45 @@ void PvaClientMonitor::start()
     monitor->start();
 }
 
+void PvaClientMonitor::start(string const & request)
+{
+    if(PvaClient::getDebug()) {
+        cout<< "PvaMonitor::start(request)"
+            << " request " << request
+            << endl;
+    }
+    PvaClientPtr client(pvaClient.lock());
+    if(!client) throw std::runtime_error("pvaClient was deleted");
+    if(!pvaClientChannel->getChannel()->isConnected()) {
+        client->message(
+             "PvaClientMonitor::start(request) but not connected",
+             errorMessage);
+        return;
+    }
+    CreateRequest::shared_pointer createRequest(CreateRequest::create());
+    PVStructurePtr pvr(createRequest->createRequest(request));
+    if(!pvr) throw std::runtime_error(createRequest->getMessage());
+    if(monitor) {
+       if(isStarted) monitor->stop();
+    }
+    monitorRequester.reset();
+    monitor.reset();
+    isStarted = false;
+    connectState = connectIdle;
+    userPoll = false;
+    userWait = false;
+    monitorRequester = MonitorRequesterImplPtr(
+        new MonitorRequesterImpl(shared_from_this(),client));
+    pvRequest = pvr;
+    connect();
+}
+
 
 void PvaClientMonitor::stop()
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientMonitor::stop"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << endl;
     }
     if(!isStarted) return;
@@ -355,30 +429,11 @@ void PvaClientMonitor::stop()
 bool PvaClientMonitor::poll()
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientMonitor::poll"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << endl;
     }
     checkMonitorState();
-    if(!isStarted) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
-            + " PvaClientMonitor::poll illegal state ";
-         throw std::runtime_error(message);
-    }
-    if(userPoll) {
-                string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
-            + " PvaClientMonitor::poll did not release last";
-        throw std::runtime_error(message);
-    }
     monitorElement = monitor->poll();
     if(!monitorElement) return false;
     userPoll = true;
@@ -389,18 +444,12 @@ bool PvaClientMonitor::poll()
 bool PvaClientMonitor::waitEvent(double secondsToWait)
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientMonitor::waitEvent"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << endl;
     }
     if(!isStarted) {
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientMonitor::waitEvent illegal state ";
         throw std::runtime_error(message);
     }
@@ -418,26 +467,12 @@ bool PvaClientMonitor::waitEvent(double secondsToWait)
 void PvaClientMonitor::releaseEvent()
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientMonitor::releaseEvent"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << endl;
     }
-    if(!isStarted) {
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
-            + " PvaClientMonitor::releaseEvent monitor not started ";
-        throw std::runtime_error(message);
-    }
     if(!userPoll) {
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientMonitor::releaseEvent did not call poll";
         throw std::runtime_error(message);
     }
@@ -445,14 +480,16 @@ void PvaClientMonitor::releaseEvent()
     monitor->release(monitorElement);
 }
 
+PvaClientChannelPtr PvaClientMonitor::getPvaClientChannel()
+{
+    return pvaClientChannel;
+}
+
 PvaClientMonitorDataPtr PvaClientMonitor::getData()
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientMonitor::getData"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << endl;
     }
     checkMonitorState();

src/pvaClientMonitorData.cpp

@@ -19,7 +19,6 @@
 
 #include <pv/pvaClient.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace std;
@@ -53,43 +52,16 @@ PvaClientMonitorDataPtr PvaClientMonitorData::create(StructureConstPtr const & s
 }
 
 PvaClientMonitorData::PvaClientMonitorData(StructureConstPtr const & structure)
-: structure(structure)
+: PvaClientData(structure)
 {
-    messagePrefix = "";
 }
 
 void PvaClientMonitorData::setData(MonitorElementPtr const & monitorElement)
 {
-   pvStructure = monitorElement->pvStructurePtr;
-   changedBitSet = monitorElement->changedBitSet;
+   PVStructurePtr pvStructure = monitorElement->pvStructurePtr;
+   BitSetPtr changedBitSet = monitorElement->changedBitSet;
+   PvaClientData::setData(pvStructure,changedBitSet);
    overrunBitSet = monitorElement->overrunBitSet;
-   pvValue = pvStructure->getSubField("value");
-}
-
-void PvaClientMonitorData::checkValue()
-{
-    if(pvValue) return;
-    throw std::runtime_error(messagePrefix + noValue);
-}
-
-void PvaClientMonitorData::setMessagePrefix(std::string const & value)
-{
-    messagePrefix = value + " ";
-}
-
-StructureConstPtr PvaClientMonitorData::getStructure()
-{return structure;}
-
-PVStructurePtr PvaClientMonitorData::getPVStructure()
-{
-    if(pvStructure) return pvStructure;
-    throw std::runtime_error(messagePrefix + noStructure);
-}
-
-BitSetPtr PvaClientMonitorData::getChangedBitSet()
-{
-    if(!changedBitSet) throw std::runtime_error(messagePrefix + noStructure);
-    return changedBitSet;
 }
 
 BitSetPtr PvaClientMonitorData::getOverrunBitSet()
@@ -98,24 +70,6 @@ BitSetPtr PvaClientMonitorData::getOverrunBitSet()
     return overrunBitSet;
 }
 
-std::ostream & PvaClientMonitorData::showChanged(std::ostream & out)
-{
-    if(!changedBitSet) throw std::runtime_error(messagePrefix + noStructure);
-    size_t nextSet = changedBitSet->nextSetBit(0);
-    PVFieldPtr pvField;
-    while(nextSet!=string::npos) {
-        if(nextSet==0) {
-             pvField = pvStructure;
-        } else {
-              pvField = pvStructure->getSubField(nextSet);
-        }
-        string name = pvField->getFullName();
-        out << name << " = " << pvField << endl;
-        nextSet = changedBitSet->nextSetBit(nextSet+1);
-    }
-    return out;
-}
-
 std::ostream & PvaClientMonitorData::showOverrun(std::ostream & out)
 {
     if(!overrunBitSet) throw std::runtime_error(messagePrefix + noStructure);
@@ -123,9 +77,9 @@ std::ostream & PvaClientMonitorData::showOverrun(std::ostream & out)
     PVFieldPtr pvField;
     while(nextSet!=string::npos) {
         if(nextSet==0) {
-             pvField = pvStructure;
+             pvField = getPVStructure();
         } else {
-              pvField = pvStructure->getSubField(nextSet);
+              pvField = getPVStructure()->getSubField(nextSet);
         }
         string name = pvField->getFullName();
         out << name << " = " << pvField << endl;
@@ -134,135 +88,4 @@ std::ostream & PvaClientMonitorData::showOverrun(std::ostream & out)
     return out;
 }
 
-bool PvaClientMonitorData::hasValue()
-{
-    if(!pvValue) return false;
-    return true;
-}
-
-bool PvaClientMonitorData::isValueScalar()
-{
-    if(!pvValue) return false;
-    if(pvValue->getField()->getType()==scalar) return true;
-    return false;
-}
-
-bool PvaClientMonitorData::isValueScalarArray()
-{
-    if(!pvValue) return false;
-    if(pvValue->getField()->getType()==scalarArray) return true;
-    return false;
-}
-
-PVFieldPtr  PvaClientMonitorData::getValue()
-{
-   checkValue();
-   return pvValue;
-}
-
-PVScalarPtr  PvaClientMonitorData::getScalarValue()
-{
-    checkValue();
-    PVScalarPtr pv = pvStructure->getSubField<PVScalar>("value");
-    if(!pv) {
-        throw std::runtime_error(messagePrefix + noScalar);
-    }
-    return pv;
-}
-
-PVArrayPtr  PvaClientMonitorData::getArrayValue()
-{
-    checkValue();
-    PVArrayPtr pv = pvStructure->getSubField<PVArray>("value");
-    if(!pv) {
-        throw std::runtime_error(messagePrefix + noArray);
-    }
-    return pv;
-}
-
-PVScalarArrayPtr  PvaClientMonitorData::getScalarArrayValue()
-{
-    checkValue();
-    PVScalarArrayPtr pv = pvStructure->getSubField<PVScalarArray>("value");
-    if(!pv) {
-        throw std::runtime_error(messagePrefix + noScalarArray);
-    }
-    return pv;
-}
-
-double PvaClientMonitorData::getDouble()
-{
-    PVScalarPtr pvScalar = getScalarValue();
-    ScalarType scalarType = pvScalar->getScalar()->getScalarType();
-    if(scalarType==pvDouble) {
-        PVDoublePtr pvDouble = static_pointer_cast<PVDouble>(pvScalar);
-        return pvDouble->get();
-    }
-    if(!ScalarTypeFunc::isNumeric(scalarType)) {
-        throw std::runtime_error(messagePrefix + notCompatibleScalar);
-    }
-    return convert->toDouble(pvScalar);
-}
-
-string PvaClientMonitorData::getString()
-{
-    PVScalarPtr pvScalar = getScalarValue();
-    return convert->toString(pvScalar);
-}
-
-shared_vector<const double> PvaClientMonitorData::getDoubleArray()
-{
-    checkValue();
-    PVDoubleArrayPtr pv = pvStructure->getSubField<PVDoubleArray>("value");
-    if(!pv) {
-        throw std::runtime_error(messagePrefix + notDoubleArray);
-    }
-    return pv->view();   
-}
-
-shared_vector<const string> PvaClientMonitorData::getStringArray()
-{
-    checkValue();
-    PVStringArrayPtr pv = pvStructure->getSubField<PVStringArray>("value");
-    if(!pv) {
-        throw std::runtime_error(messagePrefix + notStringArray);
-    }
-    return pv->view();   
-
-}
-
-Alarm PvaClientMonitorData::getAlarm()
-{
-   if(!pvStructure) {
-        throw std::runtime_error(messagePrefix + noAlarm);
-   }
-   PVStructurePtr pvs = pvStructure->getSubField<PVStructure>("alarm");
-   if(!pvs) throw std::runtime_error(messagePrefix + noAlarm);
-   pvAlarm.attach(pvs);
-   if(pvAlarm.isAttached()) {
-       Alarm alarm;
-       pvAlarm.get(alarm);
-       pvAlarm.detach();
-       return alarm;
-   }
-   throw std::runtime_error(messagePrefix + noAlarm);
-}
-
-TimeStamp PvaClientMonitorData::getTimeStamp()
-{
-   if(!pvStructure) {
-        throw std::runtime_error(messagePrefix + noTimeStamp);
-   }
-   PVStructurePtr pvs = pvStructure->getSubField<PVStructure>("timeStamp");
-   if(!pvs) throw std::runtime_error(messagePrefix + noTimeStamp);
-   pvTimeStamp.attach(pvs);
-   if(pvTimeStamp.isAttached()) {
-       TimeStamp timeStamp;
-       pvTimeStamp.get(timeStamp);
-       pvTimeStamp.detach();
-       return timeStamp;
-   }
-   throw std::runtime_error(messagePrefix + noTimeStamp);
-}
-
 }}

src/pvaClientMultiChannel.cpp

@@ -17,9 +17,6 @@
 
 #include <pv/pvaClientMultiChannel.h>
 
-
-
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace std;

src/pvaClientMultiGetDouble.cpp

@@ -16,7 +16,6 @@
 
 #include <pv/pvaClientMultiChannel.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace epics::nt;

src/pvaClientMultiMonitorDouble.cpp

@@ -16,7 +16,6 @@
 
 #include <pv/pvaClientMultiChannel.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace epics::nt;

src/pvaClientMultiPutDouble.cpp

@@ -16,7 +16,6 @@
 
 #include <pv/pvaClientMultiChannel.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace epics::nt;

src/pvaClientNTMultiData.cpp

@@ -15,7 +15,6 @@
 
 #include <pv/pvaClientMultiChannel.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace epics::nt;
@@ -45,10 +44,6 @@ PvaClientNTMultiData::PvaClientNTMultiData(
   gotTimeStamp(false)
 {
     if(PvaClient::getDebug()) cout<< "PvaClientNTMultiData::PvaClientNTMultiData()\n";
-    PVFieldPtr pvValue = pvRequest->getSubField("field.value");
-    if(!pvValue) {
-        throw std::runtime_error("pvRequest did not specify value");
-    }
     topPVStructure.resize(nchannel);
     unionValue.resize(nchannel);
     PVDataCreatePtr pvDataCreate = getPVDataCreate();
@@ -89,18 +84,6 @@ PvaClientNTMultiData::~PvaClientNTMultiData()
     if(PvaClient::getDebug()) cout<< "PvaClientNTMultiData::~PvaClientNTMultiData()\n";
 }
 
-
-void PvaClientNTMultiData::setStructure(StructureConstPtr const & structure,size_t index)
-{
-    FieldConstPtr field = structure->getField("value");
-    if(!field) {
-        string message = "channel "
-           + pvaClientChannelArray[index]->getChannel()->getChannelName()
-           + " does not have top level value field";
-        throw std::runtime_error(message);
-    }
-}
-
 void PvaClientNTMultiData::setPVStructure(
         PVStructurePtr const &pvStructure,size_t index)
 {
@@ -138,26 +121,49 @@ void PvaClientNTMultiData::startDeltaTime()
 }
 
 
-void PvaClientNTMultiData::endDeltaTime()
+void PvaClientNTMultiData::endDeltaTime(bool valueOnly)
 {
     for(size_t i=0; i<nchannel; ++i)
     {
         PVStructurePtr pvst = topPVStructure[i];
         if(!pvst) {
             unionValue[i] = PVUnionPtr();
-        } else {
-            unionValue[i]->set(pvst->getSubField("value"));
+        } else if(unionValue[i]) {
+            if(valueOnly) {
+                PVFieldPtr pvValue = pvst->getSubField("value");
+                if(pvValue) {
+                    unionValue[i]->set(pvst->getSubField("value"));
+                } else {
+                    unionValue[i] = PVUnionPtr();
+                }
+            } else {
+                unionValue[i]->set(pvst);
+            }
             if(gotAlarm)
             {
-                severity[i] = pvst->getSubField<PVInt>("alarm.severity")->get();
-                status[i] = pvst->getSubField<PVInt>("alarm.status")->get();
-                message[i] = pvst->getSubField<PVString>("alarm.message")->get();
+                PVIntPtr pvSeverity = pvst->getSubField<PVInt>("alarm.severity");
+                PVIntPtr pvStatus = pvst->getSubField<PVInt>("alarm.status");
+                PVStringPtr pvMessage = pvst->getSubField<PVString>("alarm.message");
+                if(pvSeverity&&pvStatus&&pvMessage) {
+                    severity[i] = pvSeverity->get();
+                    status[i] = pvStatus->get();
+                    message[i] = pvMessage->get();
+                } else {
+                    severity[i] = undefinedAlarm;
+                    status[i] = undefinedStatus;
+                    message[i] = "no alarm field";
+                }
             }
             if(gotTimeStamp)
             {
-                secondsPastEpoch[i] = pvst->getSubField<PVLong>("timeStamp.secondsPastEpoch")->get();
-                nanoseconds[i] = pvst->getSubField<PVInt>("timeStamp.nanoseconds")->get();
-                userTag[i] = pvst->getSubField<PVInt>("timeStamp.userTag")->get();
+                PVLongPtr pvEpoch = pvst->getSubField<PVLong>("timeStamp.secondsPastEpoch");
+                PVIntPtr pvNano = pvst->getSubField<PVInt>("timeStamp.nanoseconds");
+                PVIntPtr pvTag = pvst->getSubField<PVInt>("timeStamp.userTag");
+                if(pvEpoch&&pvNano&&pvTag) {
+                    secondsPastEpoch[i] = pvEpoch->get();
+                    nanoseconds[i] = pvNano->get();
+                    userTag[i] = pvTag->get();
+                }
             }
         } 
     }

src/pvaClientNTMultiGet.cpp

@@ -15,7 +15,6 @@
 
 #include <pv/pvaClientMultiChannel.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace epics::nt;
@@ -64,13 +63,10 @@ void PvaClientNTMultiGet::connect()
 {
     pvaClientGet.resize(nchannel);
     shared_vector<epics::pvData::boolean> isConnected = pvaClientMultiChannel->getIsConnected();
-    string request = "value";
-    if(pvRequest->getSubField("field.alarm")) request += ",alarm";
-    if(pvRequest->getSubField("field.timeStamp")) request += ",timeStamp";
     for(size_t i=0; i<nchannel; ++i)
     {
          if(isConnected[i]) {
-               pvaClientGet[i] = pvaClientChannelArray[i]->createGet(request);
+               pvaClientGet[i] = pvaClientChannelArray[i]->createGet(pvRequest);
                pvaClientGet[i]->issueConnect();
          }
     }
@@ -87,7 +83,7 @@ void PvaClientNTMultiGet::connect()
     this->isConnected = true;
 }
 
-void PvaClientNTMultiGet::get()
+void PvaClientNTMultiGet::get(bool valueOnly)
 {
     if(!isConnected) connect();
     shared_vector<epics::pvData::boolean> isConnected = pvaClientMultiChannel->getIsConnected();
@@ -115,7 +111,7 @@ void PvaClientNTMultiGet::get()
               pvaClientNTMultiData->setPVStructure(pvaClientGet[i]->getData()->getPVStructure(),i);
          }
     }
-    pvaClientNTMultiData->endDeltaTime();
+    pvaClientNTMultiData->endDeltaTime(valueOnly);
 }
 
 PvaClientNTMultiDataPtr PvaClientNTMultiGet::getData()

src/pvaClientNTMultiMonitor.cpp

@@ -18,7 +18,6 @@
 
 #include <pv/pvaClientMultiChannel.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace epics::nt;
@@ -68,13 +67,10 @@ void PvaClientNTMultiMonitor::connect()
 {
     pvaClientMonitor.resize(nchannel);
     shared_vector<epics::pvData::boolean> isConnected = pvaClientMultiChannel->getIsConnected();
-    string request = "value";
-    if(pvRequest->getSubField("field.alarm")) request += ",alarm";
-    if(pvRequest->getSubField("field.timeStamp")) request += ",timeStamp";
     for(size_t i=0; i<nchannel; ++i)
     {
          if(isConnected[i]) {
-               pvaClientMonitor[i] = pvaClientChannelArray[i]->createMonitor(request);
+               pvaClientMonitor[i] = pvaClientChannelArray[i]->createMonitor(pvRequest);
                pvaClientMonitor[i]->issueConnect();
          }
     }
@@ -95,7 +91,7 @@ void PvaClientNTMultiMonitor::connect()
     this->isConnected = true;
 }
 
-bool PvaClientNTMultiMonitor::poll()
+bool PvaClientNTMultiMonitor::poll(bool valueOnly)
 {
     if(!isConnected) connect();
     bool result = false;
@@ -112,7 +108,7 @@ bool PvaClientNTMultiMonitor::poll()
               }
          }
     }
-    if(result) pvaClientNTMultiData->endDeltaTime();
+    if(result) pvaClientNTMultiData->endDeltaTime(valueOnly);
     return result;
 }
 

src/pvaClientNTMultiPut.cpp

@@ -17,7 +17,6 @@
 
 #include <pv/pvaClientMultiChannel.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace epics::nt;

src/pvaClientProcess.cpp

@@ -15,7 +15,6 @@
 
 #include <pv/pvaClient.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace std;
@@ -70,33 +69,46 @@ public:
 
 PvaClientProcessPtr PvaClientProcess::create(
         PvaClientPtr const &pvaClient,
-        Channel::shared_pointer const & channel,
+        PvaClientChannelPtr const & pvaClientChannel,
         PVStructurePtr const &pvRequest)
 {
-    PvaClientProcessPtr epv(new PvaClientProcess(pvaClient,channel,pvRequest));
-    epv->channelProcessRequester = ChannelProcessRequesterImplPtr(
-        new ChannelProcessRequesterImpl(epv,pvaClient));
-    return epv;
+    if(PvaClient::getDebug()) {
+         cout<< "PvaClientProcess::create(pvaClient,channelName,pvRequest)\n"
+             << " channelName " <<  pvaClientChannel->getChannel()->getChannelName()
+             << " pvRequest " << pvRequest
+             << endl;
+    }
+    PvaClientProcessPtr channelProcess(new PvaClientProcess(pvaClient,pvaClientChannel,pvRequest));
+    channelProcess->channelProcessRequester = ChannelProcessRequesterImplPtr(
+        new ChannelProcessRequesterImpl(channelProcess,pvaClient));
+    return channelProcess;
 }
 
 
 PvaClientProcess::PvaClientProcess(
         PvaClientPtr const &pvaClient,
-        Channel::shared_pointer const & channel,
+        PvaClientChannelPtr const & pvaClientChannel,
         PVStructurePtr const &pvRequest)
 : pvaClient(pvaClient),
-  channel(channel),
+  pvaClientChannel(pvaClientChannel),
   pvRequest(pvRequest),
   connectState(connectIdle),
   processState(processIdle)
 {
-    if(PvaClient::getDebug()) cout<< "PvaClientProcess::PvaClientProcess()\n";
+    if(PvaClient::getDebug()) {
+        cout<< "PvaClientProcess::PvaClientProcess()"
+            << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+            << endl;
+    }
 }
 
 PvaClientProcess::~PvaClientProcess()
 {
-    if(PvaClient::getDebug()) cout<< "PvaClientProcess::~PvaClientProcess()\n";
-    channelProcess->destroy();
+    if(PvaClient::getDebug()) {
+        cout<< "PvaClientProcess::~PvaClientProcess()"
+            << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+            << endl;
+    }
 }
 
 // from ChannelProcessRequester
@@ -118,9 +130,31 @@ void PvaClientProcess::channelProcessConnect(
     const Status& status,
     ChannelProcess::shared_pointer const & channelProcess)
 {
-    channelProcessConnectStatus = status;
-    connectState = connected;
-    this->channelProcess = channelProcess;
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientProcess::channelProcessConnect"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << " status.isOK " << (status.isOK() ? "true" : "false")
+           << endl;
+    }
+    {
+        Lock xx(mutex);
+        this->channelProcess = channelProcess;
+        if(status.isOK()) {
+            channelProcessConnectStatus = status;
+            connectState = connected;
+        } else {
+             stringstream ss;
+             ss << pvRequest;
+             string message = string("PvaClientProcess::channelProcessConnect")
+               + "\npvRequest\n" + ss.str()
+               + "\nerror\n" + status.getMessage();
+             channelProcessConnectStatus = Status(Status::STATUSTYPE_ERROR,message);
+        }
+    }
+    PvaClientProcessRequesterPtr  req(pvaClientProcessRequester.lock());
+    if(req) {
+          req->channelProcessConnect(status,shared_from_this());
+    }
     waitForConnect.signal();
     
 }
@@ -129,40 +163,70 @@ void PvaClientProcess::processDone(
     const Status& status,
     ChannelProcess::shared_pointer const & channelProcess)
 {
-    channelProcessStatus = status;
-    processState = processComplete;
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientProcess::processDone"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << " status.isOK " << (status.isOK() ? "true" : "false")
+           << endl;
+    }
+    {
+        Lock xx(mutex);
+        channelProcessStatus = status;
+        processState = processComplete;
+    }
+    
+    PvaClientProcessRequesterPtr  req(pvaClientProcessRequester.lock());
+    if(req) {
+          req->processDone(status,shared_from_this());
+    }
     waitForProcess.signal();
 }
 
 void PvaClientProcess::connect()
 {
+     if(PvaClient::getDebug()) {
+        cout << "PvaClientProcess::connect"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     issueConnect();
     Status status = waitConnect();
     if(status.isOK()) return;
-    string message = string("channel ") + channel->getChannelName()
+    string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
         + " PvaClientProcess::connect " + status.getMessage();
     throw std::runtime_error(message);
 }
 
 void PvaClientProcess::issueConnect()
 {
+     if(PvaClient::getDebug()) {
+        cout << "PvaClientProcess::issueConnect"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     if(connectState!=connectIdle) {
-        string message = string("channel ") + channel->getChannelName()
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
             + " pvaClientProcess already connected ";
         throw std::runtime_error(message);
     }
     connectState = connectActive;
-    channelProcess = channel->createChannelProcess(channelProcessRequester,pvRequest);
+    channelProcessConnectStatus = Status(Status::STATUSTYPE_ERROR, "connect active");
+    channelProcess = pvaClientChannel->getChannel()->createChannelProcess(channelProcessRequester,pvRequest);
 }
 
 Status PvaClientProcess::waitConnect()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientProcess::waitConnect"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     if(connectState==connected) {
          if(!channelProcessConnectStatus.isOK()) connectState = connectIdle;
          return channelProcessConnectStatus;
     }
     if(connectState!=connectActive) {
-        string message = string("channel ") + channel->getChannelName()
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
             + " pvaClientProcess illegal connect state ";
         throw std::runtime_error(message);
     }
@@ -173,19 +237,29 @@ Status PvaClientProcess::waitConnect()
 
 void PvaClientProcess::process()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientProcess::process"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     issueProcess();
     Status status = waitProcess();
     if(status.isOK()) return;
-    string message = string("channel ") + channel->getChannelName()
+    string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
         + " PvaClientProcess::process" + status.getMessage();
     throw std::runtime_error(message);
 }
 
 void PvaClientProcess::issueProcess()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientProcess::issueProcess"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     if(connectState==connectIdle) connect();
-    if(processState!=processIdle) {
-        string message = string("channel ") + channel->getChannelName()
+    if(processState==processActive) {
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientProcess::issueProcess process aleady active ";
         throw std::runtime_error(message);
     }
@@ -195,18 +269,42 @@ void PvaClientProcess::issueProcess()
 
 Status PvaClientProcess::waitProcess()
 {
-    if(processState==processComplete) {
-        processState = processIdle;
-        return channelProcessStatus;
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientProcess::waitProcess"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
     }
-    if(processState!=processActive){
-        string message = string("channel ") + channel->getChannelName()
-            + " PvaClientProcess::waitProcess llegal process state";
-        throw std::runtime_error(message);
+    {
+        Lock xx(mutex);
+        if(processState==processComplete) {
+            processState = processIdle;
+            return channelProcessStatus;
+        }
+        if(processState!=processActive){
+            string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
+                 + " PvaClientProcess::waitProcess llegal process state";
+            throw std::runtime_error(message);
+        }
     }
     waitForProcess.wait();
-    processState = processIdle;
+    processState = processComplete;
     return channelProcessStatus;
 }
 
+void PvaClientProcess::setRequester(PvaClientProcessRequesterPtr const & pvaClientProcessRequester)
+{
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientProcess::setRequester"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
+    this->pvaClientProcessRequester = pvaClientProcessRequester;
+}
+
+PvaClientChannelPtr PvaClientProcess::getPvaClientChannel()
+{
+    return pvaClientChannel;
+}
+
+
 }}

src/pvaClientPut.cpp

@@ -15,7 +15,6 @@
 
 #include <pv/pvaClient.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace std;
@@ -70,7 +69,7 @@ public:
         clientPut->getDone(status,channelPut,pvStructure,bitSet);
     }
 
-        virtual void putDone(
+    virtual void putDone(
         const Status& status,
         ChannelPut::shared_pointer const & channelPut)
     {
@@ -82,30 +81,29 @@ public:
 
 PvaClientPutPtr PvaClientPut::create(
         PvaClientPtr const &pvaClient,
-        Channel::shared_pointer const & channel,
+        PvaClientChannelPtr const & pvaClientChannel,
         PVStructurePtr const &pvRequest)
 {
-    PvaClientPutPtr epv(new PvaClientPut(pvaClient,channel,pvRequest));
-    epv->channelPutRequester = ChannelPutRequesterImplPtr(
-        new ChannelPutRequesterImpl(epv,pvaClient));
-    return epv;
+    PvaClientPutPtr clientPut(new PvaClientPut(pvaClient,pvaClientChannel,pvRequest));
+    clientPut->channelPutRequester = ChannelPutRequesterImplPtr(
+        new ChannelPutRequesterImpl(clientPut,pvaClient));
+    return clientPut;
 }
 
 
-
 PvaClientPut::PvaClientPut(
         PvaClientPtr const &pvaClient,
-        Channel::shared_pointer const & channel,
+        PvaClientChannelPtr const & pvaClientChannel,
         PVStructurePtr const &pvRequest)
 : pvaClient(pvaClient),
-  channel(channel),
+  pvaClientChannel(pvaClientChannel),
   pvRequest(pvRequest),
   connectState(connectIdle),
   putState(putIdle)
 {
     if(PvaClient::getDebug()) {
          cout<< "PvaClientPut::PvaClientPut"
-             << " channelName " << channel->getChannelName() 
+             << " channelName " <<  pvaClientChannel->getChannel()->getChannelName()
              << endl;
     }
 }
@@ -113,21 +111,28 @@ PvaClientPut::PvaClientPut(
 PvaClientPut::~PvaClientPut()
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout<< "PvaClientPut::~PvaClientPut"
-           << " channelName " << channelName
+           << " channelName " <<  pvaClientChannel->getChannel()->getChannelName()
            << endl;
     }
-    if(channelPut) channelPut->destroy();
 }
 
-void PvaClientPut::checkPutState()
+
+void PvaClientPut::checkConnectState()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPut::checkConnectState"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     if(connectState==connectIdle){
           connect();
-          get();
+    }
+    if(connectState==connectActive){
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
+            + " "
+            + channelPutConnectStatus.getMessage();
+        throw std::runtime_error(message);
     }
 }
 
@@ -151,23 +156,32 @@ void PvaClientPut::channelPutConnect(
     StructureConstPtr const & structure)
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientPut::channelPutConnect"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << " status.isOK " << (status.isOK() ? "true" : "false")
            << endl;
     }
     {
         Lock xx(mutex);
-        channelPutConnectStatus = status;
         this->channelPut = channelPut;
         if(status.isOK()) {
+            channelPutConnectStatus = status;
+            connectState = connected;
             pvaClientData = PvaClientPutData::create(structure);
             pvaClientData->setMessagePrefix(channelPut->getChannel()->getChannelName());
+        } else {
+             stringstream ss;
+             ss << pvRequest;
+             string message = string("\nPvaClientPut::channelPutConnect)")
+               + "\npvRequest\n" + ss.str()
+               + "\nerror\n" + status.getMessage();
+             channelPutConnectStatus = Status(Status::STATUSTYPE_ERROR,message);
         }
     }
+    PvaClientPutRequesterPtr  req(pvaClientPutRequester.lock());
+    if(req) {
+          req->channelPutConnect(status,shared_from_this());
+    }
     waitForConnect.signal();
     
 }
@@ -179,21 +193,26 @@ void PvaClientPut::getDone(
     BitSetPtr const & bitSet)
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientPut::getDone"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << " status.isOK " << (status.isOK() ? "true" : "false")
            << endl;
     }
-    channelGetPutStatus = status;
-    if(status.isOK()) {
-        PVStructurePtr pvs = pvaClientData->getPVStructure();
-        pvs->copyUnchecked(*pvStructure,*bitSet);
-        BitSetPtr bs = pvaClientData->getChangedBitSet();
-        bs->clear();
-        *bs |= *bitSet;
+    {
+        Lock xx(mutex);
+        channelGetPutStatus = status;
+        if(status.isOK()) {
+            PVStructurePtr pvs = pvaClientData->getPVStructure();
+            pvs->copyUnchecked(*pvStructure,*bitSet);
+            BitSetPtr bs = pvaClientData->getChangedBitSet();
+            bs->clear();
+            *bs |= *bitSet;
+            putState = putComplete;
+        }
+    }
+    PvaClientPutRequesterPtr  req(pvaClientPutRequester.lock());
+    if(req) {
+          req->getDone(status,shared_from_this());
     }
     waitForGetPut.signal();
 }
@@ -203,28 +222,35 @@ void PvaClientPut::putDone(
     ChannelPut::shared_pointer const & channelPut)
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientPut::putDone"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << " status.isOK " << (status.isOK() ? "true" : "false")
            << endl;
     }
-    channelGetPutStatus = status;
+    {
+        Lock xx(mutex);
+        channelGetPutStatus = status;
+        putState = putComplete;
+    }
+    PvaClientPutRequesterPtr  req(pvaClientPutRequester.lock());
+    if(req) {
+          req->putDone(status,shared_from_this());
+    }
     waitForGetPut.signal();
 }
 
 void PvaClientPut::connect()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPut::connect"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     issueConnect();
     Status status = waitConnect();
     if(status.isOK()) return;
-    Channel::shared_pointer chan(channel.lock());
-    string channelName("disconnected");
-    if(chan) channelName = chan->getChannelName();
     string message = string("channel ") 
-        + channelName
+        + pvaClientChannel->getChannel()->getChannelName()
         + " PvaClientPut::connect "
         + status.getMessage();
     throw std::runtime_error(message);
@@ -232,24 +258,29 @@ void PvaClientPut::connect()
 
 void PvaClientPut::issueConnect()
 {
-    Channel::shared_pointer chan(channel.lock());
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPut::issueConnect"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     if(connectState!=connectIdle) {
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
             + " pvaClientPut already connected ";
         throw std::runtime_error(message);
     }
-    if(chan) {
-        connectState = connectActive;
-        channelPut = chan->createChannelPut(channelPutRequester,pvRequest);
-        return;
-    }
-    throw std::runtime_error("PvaClientPut::issueConnect() but channel disconnected");
+    connectState = connectActive;
+    channelPutConnectStatus = Status(Status::STATUSTYPE_ERROR, "connect active");
+    channelPut = pvaClientChannel->getChannel()->createChannelPut(channelPutRequester,pvRequest);
+       
 }
 
 Status PvaClientPut::waitConnect()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPut::waitConnect"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     {
         Lock xx(mutex);
         if(connectState==connected) {
@@ -257,10 +288,7 @@ Status PvaClientPut::waitConnect()
              return channelPutConnectStatus;
         }
         if(connectState!=connectActive) {
-            Channel::shared_pointer chan(channel.lock());
-            string channelName("disconnected");
-            if(chan) channelName = chan->getChannelName();
-            string message = string("channel ") + channelName
+            string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
                 + " PvaClientPut::waitConnect illegal connect state ";
             throw std::runtime_error(message);
         }
@@ -272,14 +300,16 @@ Status PvaClientPut::waitConnect()
 
 void PvaClientPut::get()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPut::get"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     issueGet();
     Status status = waitGet();
     if(status.isOK()) return;
-    Channel::shared_pointer chan(channel.lock());
-    string channelName("disconnected");
-    if(chan) channelName = chan->getChannelName();
     string message = string("channel ") 
-        + channelName
+        +  pvaClientChannel->getChannel()->getChannelName()
         + " PvaClientPut::get "
         + status.getMessage();
     throw std::runtime_error(message);
@@ -287,13 +317,15 @@ void PvaClientPut::get()
 
 void PvaClientPut::issueGet()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPut::issueGet"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     if(connectState==connectIdle) connect();
-    if(putState!=putIdle) {
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
+    if(putState==getActive || putState==putActive) {
         string message = string("channel ")
-            + channelName
+            + pvaClientChannel->getChannel()->getChannelName()
             +  "PvaClientPut::issueGet get or put aleady active ";
         throw std::runtime_error(message);
     }
@@ -303,30 +335,37 @@ void PvaClientPut::issueGet()
 
 Status PvaClientPut::waitGet()
 {
-    if(putState!=getActive){
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ")
-            + channelName
-            +  " PvaClientPut::waitGet illegal put state";
-        throw std::runtime_error(message);
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPut::waitGet"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
+    {
+        Lock xx(mutex);
+        if(putState==putComplete) return channelGetPutStatus;
+        if(putState!=getActive){
+            string message = string("channel ")
+                + pvaClientChannel->getChannel()->getChannelName()
+                +  " PvaClientPut::waitGet illegal put state";
+            throw std::runtime_error(message);
+        }
     }
     waitForGetPut.wait();
-    putState = putIdle;
     return channelGetPutStatus;
 }
 
 void PvaClientPut::put()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPut::put"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     issuePut();
     Status status = waitPut();
     if(status.isOK()) return;
-    Channel::shared_pointer chan(channel.lock());
-    string channelName("disconnected");
-    if(chan) channelName = chan->getChannelName();
     string message = string("channel ")
-        + channelName
+        + pvaClientChannel->getChannel()->getChannelName()
         + " PvaClientPut::put "
         + status.getMessage();
     throw std::runtime_error(message);
@@ -334,14 +373,18 @@ void PvaClientPut::put()
 
 void PvaClientPut::issuePut()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPut::issuePut"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << " pvStructure\n" << pvaClientData->getPVStructure() 
+           << " bitSet " << *pvaClientData->getChangedBitSet() << endl
+           << endl;
+    }
     if(connectState==connectIdle) connect();
-    if(putState!=putIdle) {
-         Channel::shared_pointer chan(channel.lock());
-         string channelName("disconnected");
-         if(chan) channelName = chan->getChannelName();
+    if(putState==getActive || putState==putActive) {
          string message = string("channel ")
-            + channelName
-            +  "PvaClientPut::issueGet get or put aleady active ";
+            + pvaClientChannel->getChannel()->getChannelName()
+            +  "PvaClientPut::issuePut get or put aleady active ";
          throw std::runtime_error(message);
     }
     putState = putActive;
@@ -350,26 +393,51 @@ void PvaClientPut::issuePut()
 
 Status PvaClientPut::waitPut()
 {
-    if(putState!=putActive){
-         Channel::shared_pointer chan(channel.lock());
-         string channelName("disconnected");
-         if(chan) channelName = chan->getChannelName();
-         string message = string("channel ")
-            + channelName
-            +  " PvaClientPut::waitPut illegal put state";
-         throw std::runtime_error(message);
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPut::waitPut"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
+    {
+        Lock xx(mutex);
+        if(putState==putComplete) return channelGetPutStatus;
+        if(putState!=putActive){
+            string message = string("channel ")
+                + pvaClientChannel->getChannel()->getChannelName()
+                +  " PvaClientPut::waitPut illegal put state";
+            throw std::runtime_error(message);
+        }
     }
     waitForGetPut.wait();
-    putState = putIdle;
     if(channelGetPutStatus.isOK()) pvaClientData->getChangedBitSet()->clear();
     return channelGetPutStatus;
 }
 
 PvaClientPutDataPtr PvaClientPut::getData()
 {
-    checkPutState();
+    if(PvaClient::getDebug()) {
+           cout<< "PvaClientPut::getData"
+               << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+               << endl;
+    }
+    checkConnectState();
+    if(putState==putIdle) get();
     return pvaClientData;
 }
 
+void PvaClientPut::setRequester(PvaClientPutRequesterPtr const & pvaClientPutRequester)
+{
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPut::setRequester"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
+    this->pvaClientPutRequester = pvaClientPutRequester;
+}
+
+PvaClientChannelPtr PvaClientPut::getPvaClientChannel()
+{
+    return pvaClientChannel;
+}
 
 }}

src/pvaClientPutData.cpp

@@ -25,6 +25,10 @@ using namespace epics::pvAccess;
 using namespace std;
 
 namespace epics { namespace pvaClient {
+static ConvertPtr convert = getConvert();
+static string notCompatibleScalar("value is not a compatible scalar");
+static string notDoubleArray("value is not a doubleArray");
+static string notStringArray("value is not a stringArray");
 
 class PvaClientPostHandlerPvt: public PostHandler
 {
@@ -36,28 +40,21 @@ public:
     void postPut() { putData->postPut(fieldNumber);}
 };
 
-typedef std::tr1::shared_ptr<PVArray> PVArrayPtr;
-static ConvertPtr convert = getConvert();
-static string noValue("no value field");
-static string notScalar("value is not a scalar");
-static string notCompatibleScalar("value is not a compatible scalar");
-static string notArray("value is not an array");
-static string notScalarArray("value is not a scalarArray");
-static string notDoubleArray("value is not a doubleArray");
-static string notStringArray("value is not a stringArray");
 
 PvaClientPutDataPtr PvaClientPutData::create(StructureConstPtr const & structure)
 {
+    if(PvaClient::getDebug()) cout << "PvaClientPutData::create\n";
     PvaClientPutDataPtr epv(new PvaClientPutData(structure));
     return epv;
 }
 
 PvaClientPutData::PvaClientPutData(StructureConstPtr const & structure)
-: structure(structure),
-  pvStructure(getPVDataCreate()->createPVStructure(structure)),
-  bitSet(BitSetPtr(new BitSet(pvStructure->getNumberFields())))
+: PvaClientData(structure)
 {
-    messagePrefix = "";
+    if(PvaClient::getDebug()) cout << "PvaClientPutData::PvaClientPutData\n";
+    PVStructurePtr pvStructure(getPVDataCreate()->createPVStructure(structure));
+    BitSetPtr bitSet(BitSetPtr(new BitSet(pvStructure->getNumberFields())));
+    setData(pvStructure,bitSet);
     size_t nfields = pvStructure->getNumberFields();
     postHandler.resize(nfields);
     PVFieldPtr pvField;
@@ -71,145 +68,40 @@ PvaClientPutData::PvaClientPutData(StructureConstPtr const & structure)
         }
         pvField->setPostHandler(postHandler[i]);
     }
-    pvValue = pvStructure->getSubField("value");
 }
 
-void PvaClientPutData::checkValue()
-{
-    if(pvValue) return;
-    throw std::runtime_error(messagePrefix + noValue);
-}
-
-void PvaClientPutData::postPut(size_t fieldNumber)
-{
-    bitSet->set(fieldNumber);
-}
-
-void PvaClientPutData::setMessagePrefix(std::string const & value)
-{
-    messagePrefix = value + " ";
-}
-
-StructureConstPtr PvaClientPutData::getStructure()
-{return structure;}
-
-PVStructurePtr PvaClientPutData::getPVStructure()
-{return pvStructure;}
-
-BitSetPtr PvaClientPutData::getChangedBitSet()
-{return bitSet;}
-
-std::ostream & PvaClientPutData::showChanged(std::ostream & out)
-{
-    size_t nextSet = bitSet->nextSetBit(0);
-    PVFieldPtr pvField;
-    while(nextSet!=string::npos) {
-        if(nextSet==0) {
-             pvField = pvStructure;
-        } else {
-              pvField = pvStructure->getSubField(nextSet);
-        }
-        string name = pvField->getFullName();
-        out << name << " = " << pvField << endl;
-        nextSet = bitSet->nextSetBit(nextSet+1);
-    }
-    return out;
-}
-
-bool PvaClientPutData::hasValue()
-{
-    if(!pvValue) return false;
-    return true;
-}
-
-bool PvaClientPutData::isValueScalar()
-{
-    if(!pvValue) return false;
-    if(pvValue->getField()->getType()==scalar) return true;
-    return false;
-}
-
-bool PvaClientPutData::isValueScalarArray()
-{
-    if(!pvValue) return false;
-    if(pvValue->getField()->getType()==scalarArray) return true;
-    return false;
-}
-
-PVFieldPtr  PvaClientPutData::getValue()
-{
-   checkValue();
-   return pvValue;
-}
-
-PVScalarPtr  PvaClientPutData::getScalarValue()
-{
-    checkValue();
-    PVScalarPtr pv = pvStructure->getSubField<PVScalar>("value");
-    if(!pv) throw std::runtime_error(messagePrefix + notScalar);
-    return pv;
-}
-
-PVArrayPtr  PvaClientPutData::getArrayValue()
-{
-    checkValue();
-    PVArrayPtr pv = pvStructure->getSubField<PVArray>("value");
-    if(!pv) throw std::runtime_error(messagePrefix + notArray);
-    return pv;
-}
-
-PVScalarArrayPtr  PvaClientPutData::getScalarArrayValue()
-{
-    checkValue();
-    PVScalarArrayPtr pv = pvStructure->getSubField<PVScalarArray>("value");
-    if(!pv) throw std::runtime_error(messagePrefix + notScalarArray);
-    return pv;
-}
-
-double PvaClientPutData::getDouble()
-{
-    PVScalarPtr pvScalar = getScalarValue();
-    ScalarType scalarType = pvScalar->getScalar()->getScalarType();
-    if(scalarType==pvDouble) {
-        PVDoublePtr pvDouble = static_pointer_cast<PVDouble>(pvScalar);
-        return pvDouble->get();
-    }
-    if(!ScalarTypeFunc::isNumeric(scalarType)) {
-        throw std::runtime_error(messagePrefix  + notCompatibleScalar);
-    }
-    return convert->toDouble(pvScalar);
-}
-
-string PvaClientPutData::getString()
-{
-    PVScalarPtr pvScalar = getScalarValue();
-    return convert->toString(pvScalar);
-}
-
-shared_vector<const double> PvaClientPutData::getDoubleArray()
-{
-    checkValue();
-    PVDoubleArrayPtr pv = pvStructure->getSubField<PVDoubleArray>("value");
-    if(!pv) {
-        throw std::runtime_error(messagePrefix + notDoubleArray);
-    }
-    return pv->view();   
-}
-
-shared_vector<const string> PvaClientPutData::getStringArray()
-{
-    checkValue();
-    PVStringArrayPtr pv = pvStructure->getSubField<PVStringArray>("value");
-    if(!pv) {
-        throw std::runtime_error(messagePrefix + notStringArray);
-    }
-    return pv->view();   
-
-}
 
 void PvaClientPutData::putDouble(double value)
 {
-    PVScalarPtr pvScalar = getScalarValue();
+    if(PvaClient::getDebug()) cout << "PvaClientPutData::putDouble\n";
+    PVScalarPtr pvScalar;
+    PVStructurePtr pvStructure = getPVStructure();
+    PVFieldPtr pvValue  = pvStructure->getSubField("value");
+    if(pvValue) {
+        Type type = pvValue->getField()->getType();
+        if(type==scalar) pvScalar = static_pointer_cast<PVScalar>(pvValue);
+    }
+    if(!pvScalar) {
+        while(true) {
+             const PVFieldPtrArray fieldPtrArray(pvStructure->getPVFields());
+             if(fieldPtrArray.size()!=1) {
+                  throw std::logic_error(
+                      "PvaClientData::putDouble() pvRequest for multiple fields");
+             }
+             PVFieldPtr pvField(fieldPtrArray[0]);
+             Type type = pvField->getField()->getType();
+             if(type==scalar) {
+                 pvScalar = static_pointer_cast<PVScalar>(pvField);
+                 break;
+             }
+             if(pvField->getField()->getType()!=epics::pvData::structure) break;
+             pvStructure = static_pointer_cast<PVStructure>(pvField);
+        }
+    }
+    if(!pvScalar) {
+        throw std::logic_error(
+            "PvaClientData::putDouble() did not find a scalar field");
+    }
     ScalarType scalarType = pvScalar->getScalar()->getScalarType();
     if(scalarType==pvDouble) {
         PVDoublePtr pvDouble = static_pointer_cast<PVDouble>(pvScalar);
@@ -217,47 +109,138 @@ void PvaClientPutData::putDouble(double value)
          return;
     }
     if(!ScalarTypeFunc::isNumeric(scalarType)) {
-        throw std::runtime_error(messagePrefix + notCompatibleScalar);
+        throw std::logic_error(
+            "PvaClientData::putDouble() did not find a numeric scalar field");
     }
     convert->fromDouble(pvScalar,value);
 }
 
 void PvaClientPutData::putString(std::string const & value)
 {
-    PVScalarPtr pvScalar = getScalarValue();
+    if(PvaClient::getDebug()) cout << "PvaClientPutData::putString\n";
+    PVScalarPtr pvScalar;
+    PVStructurePtr pvStructure = getPVStructure();
+    PVFieldPtr pvValue  = pvStructure->getSubField("value");
+    if(pvValue) {
+        Type type = pvValue->getField()->getType();
+        if(type==scalar) pvScalar = static_pointer_cast<PVScalar>(pvValue);
+    }
+    if(!pvScalar) {
+        while(true) {
+             const PVFieldPtrArray fieldPtrArray(pvStructure->getPVFields());
+             if(fieldPtrArray.size()!=1) {
+                  throw std::logic_error(
+                      "PvaClientData::putString() pvRequest for multiple fields");
+             }
+             PVFieldPtr pvField(fieldPtrArray[0]);
+             Type type = pvField->getField()->getType();
+             if(type==scalar) {
+                 pvScalar = static_pointer_cast<PVScalar>(pvField);
+                 break;
+             }
+             if(pvField->getField()->getType()!=epics::pvData::structure) break;
+             pvStructure = static_pointer_cast<PVStructure>(pvField);
+        }
+    }
+    if(!pvScalar) {
+        throw std::logic_error(
+            "PvaClientData::putString() did not find a scalar field");
+    }
     convert->fromString(pvScalar,value);
 }
 
-
-
 void PvaClientPutData::putDoubleArray(shared_vector<const double> const & value)
 {
-    checkValue();
-    PVDoubleArrayPtr pv = pvStructure->getSubField<PVDoubleArray>("value");
-    if(!pv) {
-        throw std::runtime_error(messagePrefix + notDoubleArray);
+    if(PvaClient::getDebug()) cout << "PvaClientPutData::putDoubleArray\n";
+    PVScalarArrayPtr pvScalarArray;
+    PVStructurePtr pvStructure = getPVStructure();
+    PVFieldPtr pvValue  = pvStructure->getSubField("value");
+    if(pvValue) {
+        Type type = pvValue->getField()->getType();
+        if(type==scalarArray) {
+             pvScalarArray = static_pointer_cast<PVScalarArray>(pvValue);
+        }
     }
-    pv->replace(value);
+    if(!pvScalarArray) {
+        while(true) {
+             const PVFieldPtrArray fieldPtrArray(pvStructure->getPVFields());
+             if(fieldPtrArray.size()!=1) {
+                  throw std::logic_error(
+                      "PvaClientData::putDoubleArray() pvRequest for multiple fields");
+             }
+             PVFieldPtr pvField(fieldPtrArray[0]);
+             Type type = pvField->getField()->getType();
+             if(type==scalarArray) {
+                 PVScalarArrayPtr pvScalarArray = static_pointer_cast<PVScalarArray>(pvField);
+                 break;
+             }
+             if(pvField->getField()->getType()!=epics::pvData::structure) break;
+             pvStructure = static_pointer_cast<PVStructure>(pvField);
+        }
+    }
+    if(!pvScalarArray) {
+        throw std::logic_error(
+            "PvaClientData::putDoubleArray() did not find a scalarArray field");
+    }
+    ScalarType scalarType = pvScalarArray->getScalarArray()->getElementType();
+    if(!ScalarTypeFunc::isNumeric(scalarType)) {
+        throw std::logic_error(
+            "PvaClientData::putDoubleArray() did not find a numeric scalarArray field");
+    }
+    pvScalarArray->putFrom<const double>(value);
 }
 
 void PvaClientPutData::putStringArray(shared_vector<const std::string> const & value)
 {
-    checkValue();
-    PVStringArrayPtr pv = pvStructure->getSubField<PVStringArray>("value");
-    if(!pv) {
-        throw std::runtime_error(messagePrefix + notStringArray);
+    if(PvaClient::getDebug()) cout << "PvaClientPutData::putStringArray\n";
+    PVScalarArrayPtr pvScalarArray;
+    PVStructurePtr pvStructure = getPVStructure();
+    PVFieldPtr pvValue  = pvStructure->getSubField("value");
+    if(pvValue) {
+       Type type = pvValue->getField()->getType();
+        if(type==scalarArray) {
+             pvScalarArray = static_pointer_cast<PVScalarArray>(pvValue);
+        }
     }
-    pv->replace(value);
+    if(!pvScalarArray) {
+        while(true) {
+             const PVFieldPtrArray fieldPtrArray(pvStructure->getPVFields());
+             if(fieldPtrArray.size()!=1) {
+                  throw std::logic_error(
+                      "PvaClientData::putStringArray() pvRequest for multiple fields");
+             }
+             PVFieldPtr pvField(fieldPtrArray[0]);
+             Type type = pvField->getField()->getType();
+             if(type==scalarArray) {
+                 pvScalarArray = static_pointer_cast<PVScalarArray>(pvField);
+                 break;
+             }
+             if(pvField->getField()->getType()!=epics::pvData::structure) break;
+             pvStructure = static_pointer_cast<PVStructure>(pvField);
+        }
+    }
+    if(!pvScalarArray) {
+        throw std::logic_error(
+            "PvaClientData::putStringArray() did not find a scalarArray field");
+    }
+    pvScalarArray->putFrom<const string>(value);
+    return;
 }
 
-void PvaClientPutData::putStringArray(std::vector<std::string> const & value)
+void PvaClientPutData::putStringArray(std::vector<string> const & value)
 {
-    checkValue();
-    PVScalarArrayPtr pv = pvStructure->getSubField<PVScalarArray>("value");
-    if(!pv) {
-        throw std::runtime_error(messagePrefix + notScalarArray);
-    }
-    convert->fromStringArray(pv,0,value.size(),value,0);
+    size_t length = value.size();
+    shared_vector<string> val(length);
+    for(size_t i=0; i < length; ++i) val[i] = value[i];
+    putStringArray(freeze(val));
+    return;
 }
 
+void PvaClientPutData::postPut(size_t fieldNumber)
+{
+    if(PvaClient::getDebug()) cout << "PvaClientPutData::postPut\n";
+    getChangedBitSet()->set(fieldNumber);
+}
+
+
 }}

src/pvaClientPutGet.cpp

@@ -14,7 +14,6 @@
 
 #include <pv/pvaClient.h>
 
-using std::tr1::static_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace std;
@@ -96,28 +95,28 @@ public:
 
 PvaClientPutGetPtr PvaClientPutGet::create(
         PvaClientPtr const &pvaClient,
-        Channel::shared_pointer const & channel,
+        PvaClientChannelPtr const & pvaClientChannel,
         PVStructurePtr const &pvRequest)
 {
-    PvaClientPutGetPtr epv(new PvaClientPutGet(pvaClient,channel,pvRequest));
-    epv->channelPutGetRequester = ChannelPutGetRequesterImplPtr(
-        new ChannelPutGetRequesterImpl(epv,pvaClient));
-    return epv;
+    PvaClientPutGetPtr clientPutGet(new PvaClientPutGet(pvaClient,pvaClientChannel,pvRequest));
+    clientPutGet->channelPutGetRequester = ChannelPutGetRequesterImplPtr(
+        new ChannelPutGetRequesterImpl(clientPutGet,pvaClient));
+    return clientPutGet;
 }
 
 PvaClientPutGet::PvaClientPutGet(
         PvaClientPtr const &pvaClient,
-        Channel::shared_pointer const & channel,
+        PvaClientChannelPtr const & pvaClientChannel,
         PVStructurePtr const &pvRequest)
 : pvaClient(pvaClient),
-  channel(channel),
+  pvaClientChannel(pvaClientChannel),
   pvRequest(pvRequest),
   connectState(connectIdle),
   putGetState(putGetIdle)
 {
     if(PvaClient::getDebug()) {
          cout<< "PvaClientPutGet::PvaClientPutGet"
-             << " channelName " << channel->getChannelName() 
+             << " channelName " << pvaClientChannel->getChannel()->getChannelName()
              << endl;
     }
 }
@@ -125,21 +124,27 @@ PvaClientPutGet::PvaClientPutGet(
 PvaClientPutGet::~PvaClientPutGet()
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout<< "PvaClientPutGet::~PvaClientPutGet"
-           << " channelName " << channelName
+           << " channelName " <<  pvaClientChannel->getChannel()->getChannelName()
            << endl;
     }
-    channelPutGet->destroy();
 }
 
 void PvaClientPutGet::checkPutGetState()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::checkPutGetState"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     if(connectState==connectIdle){
-        connect();
-        getPut();
+          connect();
+    }
+    if(connectState==connectActive){
+        string message = string("channel ") + pvaClientChannel->getChannel()->getChannelName()
+            + " "
+            + channelPutGetConnectStatus.getMessage();
+        throw std::runtime_error(message);
     }
 }
 
@@ -165,17 +170,33 @@ void PvaClientPutGet::channelPutGetConnect(
 {
     if(PvaClient::getDebug()) {
         cout << "PvaClientPutGet::channelPutGetConnect"
-           << " channelName " << channelPutGet->getChannel()->getChannelName()
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << " status.isOK " << (status.isOK() ? "true" : "false")
            << endl;
+    } 
+    {
+        Lock xx(mutex);
+        this->channelPutGet = channelPutGet;
+        if(status.isOK()) {
+            channelPutGetConnectStatus = status;
+            connectState = connected;
+            pvaClientPutData = PvaClientPutData::create(putStructure);
+            pvaClientPutData->setMessagePrefix(channelPutGet->getChannel()->getChannelName());
+            pvaClientGetData = PvaClientGetData::create(getStructure);
+            pvaClientGetData->setMessagePrefix(channelPutGet->getChannel()->getChannelName());
+           
+        } else {
+             stringstream ss;
+             ss << pvRequest;
+             string message = string("\nPvaClientPutGet::channelPutGetConnect)")
+               + "\npvRequest\n" + ss.str()
+               + "\nerror\n" + status.getMessage();
+             channelPutGetConnectStatus = Status(Status::STATUSTYPE_ERROR,message);
+        }
     }
-    channelPutGetConnectStatus = status;
-    this->channelPutGet = channelPutGet;
-    if(status.isOK()) {
-        pvaClientPutData = PvaClientPutData::create(putStructure);
-        pvaClientPutData->setMessagePrefix(channelPutGet->getChannel()->getChannelName());
-        pvaClientGetData = PvaClientGetData::create(getStructure);
-        pvaClientGetData->setMessagePrefix(channelPutGet->getChannel()->getChannelName());
+    PvaClientPutGetRequesterPtr  req(pvaClientPutGetRequester.lock());
+    if(req) {
+          req->channelPutGetConnect(status,shared_from_this());
     }
     waitForConnect.signal();
     
@@ -188,17 +209,22 @@ void PvaClientPutGet::putGetDone(
         BitSetPtr const & getChangedBitSet)
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientPutGet::putGetDone"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << " status.isOK " << (status.isOK() ? "true" : "false")
            << endl;
     }
-    channelPutGetStatus = status;
-    if(status.isOK()) {
-        pvaClientGetData->setData(getPVStructure,getChangedBitSet);
+    {
+        Lock xx(mutex);
+        channelPutGetStatus = status;
+        putGetState = putGetComplete;
+        if(status.isOK()) {
+            pvaClientGetData->setData(getPVStructure,getChangedBitSet);
+        }
+    }
+    PvaClientPutGetRequesterPtr  req(pvaClientPutGetRequester.lock());
+    if(req) {
+          req->putGetDone(status,shared_from_this());
     }
     waitForPutGet.signal();
 }
@@ -210,21 +236,26 @@ void PvaClientPutGet::getPutDone(
     BitSetPtr const & putBitSet)
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientPutGet::getPutDone"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << " status.isOK " << (status.isOK() ? "true" : "false")
            << endl;
     }
-    channelPutGetStatus = status;
-    if(status.isOK()) {
-        PVStructurePtr pvs = pvaClientPutData->getPVStructure();
-        pvs->copyUnchecked(*putPVStructure,*putBitSet);
-        BitSetPtr bs = pvaClientPutData->getChangedBitSet();
-        bs->clear();
-        *bs |= *putBitSet;
+    {
+        Lock xx(mutex);
+        channelPutGetStatus = status;
+        putGetState = putGetComplete;
+        if(status.isOK()) {
+            PVStructurePtr pvs = pvaClientPutData->getPVStructure();
+            pvs->copyUnchecked(*putPVStructure,*putBitSet);
+            BitSetPtr bs = pvaClientPutData->getChangedBitSet();
+            bs->clear();
+            *bs |= *putBitSet;
+        }
+    }
+    PvaClientPutGetRequesterPtr  req(pvaClientPutGetRequester.lock());
+    if(req) {
+          req->getPutDone(status,shared_from_this());
     }
     waitForPutGet.signal();
 }
@@ -236,31 +267,38 @@ void PvaClientPutGet::getGetDone(
         BitSetPtr const & getChangedBitSet)
 {
     if(PvaClient::getDebug()) {
-        string channelName("disconnected");
-        Channel::shared_pointer chan(channel.lock());
-        if(chan) channelName = chan->getChannelName();
         cout << "PvaClientPutGet::getGetDone"
-           << " channelName " << channelName
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
            << " status.isOK " << (status.isOK() ? "true" : "false")
            << endl;
     }
-    channelPutGetStatus = status;
-    if(status.isOK()) {
-        pvaClientGetData->setData(getPVStructure,getChangedBitSet);
+    {
+        Lock xx(mutex);
+        channelPutGetStatus = status;
+        putGetState = putGetComplete;
+        if(status.isOK()) {
+            pvaClientGetData->setData(getPVStructure,getChangedBitSet);
+        }
+    }
+    PvaClientPutGetRequesterPtr  req(pvaClientPutGetRequester.lock());
+    if(req) {
+          req->getGetDone(status,shared_from_this());
     }
     waitForPutGet.signal();
 }
 
 void PvaClientPutGet::connect()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::connect"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     issueConnect();
     Status status = waitConnect();
     if(status.isOK()) return;
-    Channel::shared_pointer chan(channel.lock());
-    string channelName("disconnected");
-    if(chan) channelName = chan->getChannelName();
     string message = string("channel ") 
-        + channelName
+        + pvaClientChannel->getChannel()->getChannelName()
         + " PvaClientPutGet::connect "
         + status.getMessage();
     throw std::runtime_error(message);
@@ -268,24 +306,29 @@ void PvaClientPutGet::connect()
 
 void PvaClientPutGet::issueConnect()
 {
-    Channel::shared_pointer chan(channel.lock());
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::issueConnect"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     if(connectState!=connectIdle) {
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+        string message = string("channel ")
+            + pvaClientChannel->getChannel()->getChannelName()
             + " pvaClientPutGet already connected ";
         throw std::runtime_error(message);
     }
-    if(chan) {
-        connectState = connectActive;
-        channelPutGet = chan->createChannelPutGet(channelPutGetRequester,pvRequest);
-        return;
-    }
-    throw std::runtime_error("PvaClientPutGet::issueConnect() but channel disconnected");
+    connectState = connectActive;
+    channelPutGetConnectStatus = Status(Status::STATUSTYPE_ERROR, "connect active");
+    channelPutGet = pvaClientChannel->getChannel()->createChannelPutGet(channelPutGetRequester,pvRequest);
 }
 
 Status PvaClientPutGet::waitConnect()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::waitConnect"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     {
          Lock xx(mutex);
          if(connectState==connected) {
@@ -293,30 +336,30 @@ Status PvaClientPutGet::waitConnect()
              return channelPutGetConnectStatus;
         }
         if(connectState!=connectActive)  {
-            Channel::shared_pointer chan(channel.lock());
-            string channelName("disconnected");
-            if(chan) channelName = chan->getChannelName();
-            string message = string("channel ") + channelName
+            string message = string("channel ")
+                + pvaClientChannel->getChannel()->getChannelName()
                 + " PvaClientPutGet::waitConnect illegal connect state ";
             throw std::runtime_error(message);
         }
     }
     waitForConnect.wait();
-    connectState = channelPutGetConnectStatus.isOK() ? connected : connectIdle;
+    if(!channelPutGetConnectStatus.isOK()) connectState = connectIdle;
     return channelPutGetConnectStatus;
 }
 
 
 void PvaClientPutGet::putGet()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::putGet"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     issuePutGet();
     Status status = waitPutGet();
     if(status.isOK()) return;
-    Channel::shared_pointer chan(channel.lock());
-    string channelName("disconnected");
-    if(chan) channelName = chan->getChannelName();
     string message = string("channel ") 
-        + channelName
+        + pvaClientChannel->getChannel()->getChannelName()
         + " PvaClientPut::putGet "
         + status.getMessage();
     throw std::runtime_error(message);
@@ -324,12 +367,15 @@ void PvaClientPutGet::putGet()
 
 void PvaClientPutGet::issuePutGet()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::issuePutGet"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     if(connectState==connectIdle) connect();
-    if(putGetState!=putGetIdle) {
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+    if(putGetState==putGetActive) {
+        string message = string("channel ")
+            + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientPutGet::issuePutGet get or put aleady active ";
         throw std::runtime_error(message);
     }
@@ -340,29 +386,35 @@ void PvaClientPutGet::issuePutGet()
 
 Status PvaClientPutGet::waitPutGet()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::waitPutGet"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
+    if(putGetState==putGetComplete) return channelPutGetStatus;
     if(putGetState!=putGetActive){
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+        string message = string("channel ")
+            + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientPutGet::waitPutGet get or put aleady active ";
         throw std::runtime_error(message);
     }
     waitForPutGet.wait();
-    putGetState = putGetIdle;
+    if(channelPutGetStatus.isOK()) pvaClientPutData->getChangedBitSet()->clear();
     return channelPutGetStatus;
 }
 
 void PvaClientPutGet::getGet()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::getGet"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     issueGetGet();
     Status status = waitGetGet();
     if(status.isOK()) return;
-    Channel::shared_pointer chan(channel.lock());
-    string channelName("disconnected");
-    if(chan) channelName = chan->getChannelName();
     string message = string("channel ") 
-        + channelName
+        + pvaClientChannel->getChannel()->getChannelName()
         + " PvaClientPut::getGet "
         + status.getMessage();
     throw std::runtime_error(message);
@@ -370,12 +422,15 @@ void PvaClientPutGet::getGet()
 
 void PvaClientPutGet::issueGetGet()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::issueGetGet"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     if(connectState==connectIdle) connect();
-    if(putGetState!=putGetIdle) {
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+    if(putGetState==putGetActive) {
+        string message = string("channel ")
+            + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientPutGet::issueGetGet get or put aleady active ";
         throw std::runtime_error(message);
     }
@@ -385,29 +440,34 @@ void PvaClientPutGet::issueGetGet()
 
 Status PvaClientPutGet::waitGetGet()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::waitGetGet"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
+    if(putGetState==putGetComplete) return channelPutGetStatus;
     if(putGetState!=putGetActive){
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+        string message = string("channel ")
+            + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientPutGet::waitGetGet get or put aleady active ";
         throw std::runtime_error(message);
     }
     waitForPutGet.wait();
-    putGetState = putGetIdle;
     return channelPutGetStatus;
 }
 
 void PvaClientPutGet::getPut()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::getGetPut"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     issueGetPut();
     Status status = waitGetPut();
     if(status.isOK()) return;
-    Channel::shared_pointer chan(channel.lock());
-    string channelName("disconnected");
-    if(chan) channelName = chan->getChannelName();
     string message = string("channel ") 
-        + channelName
+        + pvaClientChannel->getChannel()->getChannelName()
         + " PvaClientPut::getPut "
         + status.getMessage();
     throw std::runtime_error(message);
@@ -415,12 +475,15 @@ void PvaClientPutGet::getPut()
 
 void PvaClientPutGet::issueGetPut()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::issueGetPut"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
     if(connectState==connectIdle) connect();
-    if(putGetState!=putGetIdle) {
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+    if(putGetState==putGetActive) {
+        string message = string("channel ")
+            + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientPutGet::issueGetPut get or put aleady active ";
         throw std::runtime_error(message);
     }
@@ -430,29 +493,66 @@ void PvaClientPutGet::issueGetPut()
 
 Status PvaClientPutGet::waitGetPut()
 {
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::waitGetPut"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
+    if(putGetState==putGetComplete) return channelPutGetStatus;
     if(putGetState!=putGetActive){
-        Channel::shared_pointer chan(channel.lock());
-        string channelName("disconnected");
-        if(chan) channelName = chan->getChannelName();
-        string message = string("channel ") + channelName
+        string message = string("channel ")
+            + pvaClientChannel->getChannel()->getChannelName()
             + " PvaClientPutGet::waitGetPut get or put aleady active ";
         throw std::runtime_error(message);
     }
     waitForPutGet.wait();
-    putGetState = putGetIdle;
     return channelPutGetStatus;
 }
 
 PvaClientGetDataPtr PvaClientPutGet::getGetData()
 {
+    if(PvaClient::getDebug()) {
+           cout<< "PvaClientPutGet::getGetData"
+               << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+               << endl;
+    }
     checkPutGetState();
+    if(putGetState==putGetIdle){
+       getGet();
+       getPut();
+    }
     return pvaClientGetData;
 }
 
 PvaClientPutDataPtr PvaClientPutGet::getPutData()
 {
+    if(PvaClient::getDebug()) {
+           cout<< "PvaClientPutGet::getPutData"
+               << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+               << endl;
+    }
     checkPutGetState();
+    if(putGetState==putGetIdle){
+       getGet();
+       getPut();
+    }
     return pvaClientPutData;
 }
 
+void PvaClientPutGet::setRequester(PvaClientPutGetRequesterPtr const & pvaClientPutGetRequester)
+{
+    if(PvaClient::getDebug()) {
+        cout << "PvaClientPutGet::setRequester"
+           << " channelName " << pvaClientChannel->getChannel()->getChannelName()
+           << endl;
+    }
+    this->pvaClientPutGetRequester = pvaClientPutGetRequester;
+}
+
+
+PvaClientChannelPtr PvaClientPutGet::getPvaClientChannel()
+{
+    return pvaClientChannel;
+}
+
 }}

src/pvaClientRPC.cpp

@@ -12,13 +12,12 @@
 #include <sstream>
 #include <pv/event.h>
 #include <pv/bitSetUtil.h>
+#include <pv/rpcService.h>
 
 #define epicsExportSharedSymbols
 
 #include <pv/pvaClient.h>
 
-using std::tr1::static_pointer_cast;
-using std::tr1::dynamic_pointer_cast;
 using namespace epics::pvData;
 using namespace epics::pvAccess;
 using namespace std;
@@ -182,6 +181,7 @@ void PvaClientRPC::requestDone(
     PvaClientRPCRequesterPtr req = pvaClientRPCRequester.lock();
     {
         Lock xx(mutex);
+        requestStatus = status;
         if(PvaClient::getDebug()) {
              string channelName("disconnected");
              Channel::shared_pointer chan(channel.lock());
@@ -226,7 +226,7 @@ void PvaClientRPC::connect()
         + channelName
         + " PvaClientRPC::connect "
         + status.getMessage();
-    throw std::runtime_error(message);
+    throw RPCRequestException(Status::STATUSTYPE_ERROR,message);
 }
 
 void PvaClientRPC::issueConnect()
@@ -307,10 +307,18 @@ PVStructure::shared_pointer PvaClientRPC::request(PVStructure::shared_pointer co
         string message = "channel "
             + channelName
             + " PvaClientRPC::request request timeout ";
-        throw std::runtime_error(message);
+        throw RPCRequestException(Status::STATUSTYPE_ERROR,message);
     }
     rpcState = rpcIdle;
-    return pvResponse;
+    if(requestStatus.isOK()) return pvResponse;
+    Channel::shared_pointer chan(channel.lock());
+    string channelName("disconnected");
+    if(chan) channelName = chan->getChannelName();
+    string message = "channel "
+            + channelName
+            + " PvaClientRPC::request status ";
+    message += requestStatus.getMessage();
+    throw RPCRequestException(Status::STATUSTYPE_ERROR,message);
 }