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README.md
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@ -33,6 +33,6 @@ Examples are available in exampleCPP.
Status
------
* The API is for EPICS Version 4 release 4.5.0
* The API is for EPICS Version 4 release 4.6.0

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documentation/RELEASE_NOTES.md
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@ -2,7 +2,9 @@
EPICS V4 release 4.6
====================
The examples are moved to exampleCPP
* The examples are moved to exampleCPP
* Support for channelRPC is now available.
* removeRecord and traceRecord are now available.
The test is now a regression test the can be ran via

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documentation/pvDatabaseCPP.html
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@ -36,7 +36,7 @@
<div class="head">
<h1>pvDatabaseCPP</h1>
<h2 class="nocount">Release 4.2-SNAPSHOT - 2016.06.02</h2>
<h2 class="nocount">Release 4.2-SNAPSHOT - 2016.07.14</h2>
<h2 class="nocount">Abstract</h2>
@ -60,175 +60,109 @@ The minimum that an extension must provide is a top level PVStructure and a proc
<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">
<hr />
<h2>Introduction</h2>
<h3>Overview</h3>
<p>The main purpose of this project to make it easier to implement services that are accessed via pvAccess.
<h2>Overview</h2>
<p>
pvDatabaseCPP 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>
<p>
This project supplies a complete implementation of the server side of pvAccess,
which has the provider name <b>local</b>.
It is intended for developers that want to use pvDatabaseCPP.
</p>
<p>
A service must provide a top level PVStructure and a process method.
A service can be run as a main process or can be part of a V3 IOC.
Thus services can be developed that interact with V3 records, asynDriver,
areaDetector, etc.
<h2>Developer Guide</h2>
<p>A guide for developers is available at
<a
href="http://epics-pvdata.sourceforge.net/informative/developerGuide/developerGuide.html">
developerGuide
</a>
</p>
<p>This guide discusses all 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.
In particular read everything related to pvDatabase.
</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>
<p>A brief description of a pvDatabase is that it is a set of network accessible, smart,
memory resident records.
Each record has data composed of a top level PVStructure.
Each record has a name which is the channelName for pvAccess.
A local Channel Provider implements the complete ChannelProvider and
Channel interfaces as defined by pvAccess.
The local provider provides access to the records in the pvDatabase.
This local provider is accessed by the remote pvAccess server.
A record is smart because code can be attached to a record, which is accessed via a method named process.</p>
<p>This document describes components that provide the following features:</p>
<dl>
<dt>database</dt>
<dd>This encapsulates the concept of a database of memory resident smart records.
The two main components are:
<dl>
<dt>pvRecord</dt>
<dd>This encapsulates the concept of a smart record. It can be processed.
Changes to field values can be trapped. A record can be locked.</dd>
<dt>pvDatabase</dt>
<dd>This is a database of pvRecords.
Records can be added and removed from a database.</dd>
</dl>
</dd>
<dt>pvAccess</dt>
<dd>This is a complete implementation of ChannelProvider and Channel
as defined by pvAccess.
It is used by the server side of pvAccess to attach to pvRecords.
</dd>
<dt>Main and V3IOC</dt>
<dd>The pvDatabase can be provided via a Main program or can be part
of a V3IOC. In the later case the IOC has both a database of V3 Records
and a pvDatabase.</dd>
</dl>
<p>Base classes make it easy to create record instances.
The code attached to each record must create the top
level PVStructure and the following three methods:</p>
<dl>
<dt>init</dt>
<dd>This is a method for initializing the support.
It returns true if successful and false otherwise.
</dd>
<dt>process</dt>
<dd>This is what makes a record smart.
</dd>
<dt>destroy</dt>
<dd>This releases and resources used by the implementation.</dd>
</dl>
<p>Doxygen documentation is available at <a
href="./html/index.html">doxygenDoc</a></p>
<h3>Getting started</h3>
<p>The first step is to build pvDatabaseCPP as described in the next section.</p>
<p>A separate project <b>exampleCPP</b> has examples for <b>pvDatabaseCPP</b>
and for <b>pvaClientCPP</b>.
See it for examples.
<h2>doxygen</h2>
<p>doxygen documentation is available at
<a
href="./html/index.html">doxgen</a>
</p>
<h3>Features Required for localChannelProvider</h3>
<h2>pvDatabaseCPP</h2>
<p>pvDatabaseCPP itself has the following implementations of a <b>PVRecord</b></p>
<dl>
<dt>copy and monitor</dt>
<dd>pvDataCPP provides facilities copy and monitor.
This facilities allow a client to access an arbitrary subset
of the fields in the top level structure associated with a channel,
and to monitor changes in the top level structure.
pvDatabaseCPP uses what pvDataCPP provides and has code that
associates these facilities with a PVRecord.
</dd>
<dt>PVRecord and PVDatabase</dt>
<dd>Defined below.</dd>
<dt>The localChannelProvider itself</dt>
<dt>RemoveRecord.cpp</dt>
<dd>
The localChannelProvider accesses data from PVRecords.
It implements all channel methods except channelRPC,
which is implemented by pvAccessCPP.
This is the code that is used to delete another record in the same <b>IOC</b>.
</dd>
</dl>
<h3>Features Required for pvRecord</h3>
<dl>
<dt>PVDatabase</dt>
<dd>This holds a set of PVRecords.
It has methods to find, add, and remove records.</dd>
<dt>PVRecord</dt>
<dd>This, and a set of related interfaces, provides the following:
<dl>
<dt>Access to top level PVStructure</dt>
<dd>PVRecord is a wrapper on a top level pvStructure.</dd>
<dt>Record locking</dt>
<dd>A record can be locked and unlocked.
A record must be locked whenever data in the pvStructure is accessed.
</dd>
<dt>Trapping data changes</dt>
<dd>A client can request to be notified when data in the pvStructure
is modified.
It can do this on a field by field basis.</dd>
<dt>A method named process</dt>
<dt>TraceRecord.cpp</dt>
<dd>
<p>The process method is called when a pvAccess client requests that a record be processed.
If a top level timeStamp field exists,
the default process method just sets the timeStamp to the currect time.
A service is created by implementing process and providing a top level PVStructure.
</p>
This is the code that is used to set the trace level
in another record in the same <b>IOC</b>.
</dd>
</dl>
<h2>exampleCPP</h2>
<p>Example code is available as part of this release.
<a
href="http://epics-pvdata.sourceforge.net/docbuild/exampleCPP/tip/documentation/exampleCPP.html">
exampleCPP
</a>
</p>
<p>In particular look at the example code mentioned in the following sub-sections.
</p>
<h3>database</h3>
<p>This has many examples of how to create both soft records and records that implement
other functionality.</p>
<dl>
<dt>exampleDatabase.cpp</dt>
<dd>
This shows how to create soft records of each pvData type.<br />
In addition shows how to create instances of the following two records.
</dd>
<dt>exampleHelloRecord.cpp</dt>
<dd>
This is a simple "hello world" that is intentended to be used via a channelPutGet request.
</dd>
<dt>exampleHelloRPC.cpp</dt>
<dd>
This is a simple "hello world" that is intentended to be used via a channelRPC request.
</dd>
<dt>exampleDatabaseMain.cpp</dt>
<dd>
This shows how to create a standalone IOC.
</dd>
<dt>ioc and iocBoot</dt>
<dd>
This has code and examples to create a V3 IOC which also has a PVDatabase.
</dd>
</dl>
<h3>exampleLink</h3>
<p>This shows how to implement a record that has a link to another record</p>
<dl>
<dt>exampleMonitorLinkRecord</dt>
<dd>
This creates a monitor link to another record.
</dd>
<dt>exampleGetLinkRecord</dt>
<dd>
This creates a get link to another record.
</dd>
<dt>examplePutLinkRecord</dt>
<dd>
This creates a put link to another record.
</dd>
</dl>
<h2>Building pvDatabaseCPP</h2>
<p>
If a proper <b>RELEASE.local</b> is present one directory level above <b>pvDatabaseCPP</b>.
</p>
<p>
Just type:
</p>
<pre>
make
</pre>
<p>
An example of a proper <b>RELEASE.local</b> is:
</p>
<pre>
EPICS4_DIR=/home/epicsv4/master
EXAMPLE=${EPICS4_DIR}/exampleCPP
PVDATABASE=${EPICS4_DIR}/pvDatabaseCPP
PVACLIENT=${EPICS4_DIR}/pvaClientCPP
PVASRV=${EPICS4_DIR}/pvaSrv
PVACCESS=${EPICS4_DIR}/pvAccessCPP
NORMATIVETYPES=${EPICS4_DIR}/normativeTypesCPP
PVDATA=${EPICS4_DIR}/pvDataCPP
PVCOMMON=${EPICS4_DIR}/pvCommonCPP
EPICS_BASE=/home/install/epics/base
</pre>
<p>pvDatabaseCPP can also be built if a file RELEASE.local exists in directory configure.
To create one do the following:</p>
<pre>
mrk&gt; pwd
/home/hg/pvDatabaseCPP/configure
mrk&gt; cp ExampleRELEASE.local RELEASE.local
</pre>
<p>Then edit <b>RELEASE.local</b> so that it has the correct location of each
product pvDatabaseCPP requires.
Than at the top level just execute <b>make</b>:</p>
<pre>
mrk&gt; cd ..
mrk&gt; pwd
/home/epicsv4/master/pvDatabaseCPP
mrk&gt; make
</pre>
<h2>iocshell commands</h2>
<p>Shell commands are made available via the standard DBD include mechanism
provided by iocCore.
@ -252,694 +186,6 @@ pvDatabaseCPP
<p>In addition any code that implements a PVRecord must implement an ioc command.
Look at any of the examples in <b>exampleCPP</b> to see how to implement shell commands.</p>
<h2>database</h2>
<h3>src/database</h3>
<p>This Directory has the following files:</p>
<dl>
<dt>pvDatabase.h</dt>
<dd>
This is what is described in this section.
</dd>
<dt>pvDatabase.cpp</dt>
<dd>
The implementation of PVDatabase.
</dd>
<dt>pvRecord.cpp</dt>
<dd>
The implementation of the base class for PVRecord.
It can also implement record instances with a process
method does nothing.
This can be used to create a "dumb" record where all changes are
done by clients.
</dd>
</dl>
<h3>src/special</h3>
<p>This directory has the following files:</p>
<dl>
<dt>traceRecord.h</dt>
<dd>This implements a PVRecord that can set the trace level for
another record. See below for a discussion of trace level.</dd>
</dl>
<h3>pvDatabase.h</h3>
<p>The classes in pvDatabase.h describe a database of memory resident
smart records.
It describes the following classes:</p>
<dl>
<dt>PVRecord</dt>
<dd>This provides the methods required by localChannelProvider to implement Channel.</dd>
<dt>PVRecordField</dt>
<dt>PVRecordStructure</dt>
<dd>These wrap PVField and PVStructure so that pvCopy and monitor
can be implemented.</dd>
<dt>PVRecordClient</dt>
<dd>This is called by anything that accesses PVRecord.</dd>
<dt>PVListener</dt>
<dd>This is implemented by anything that wants to trap calls to PVRecord::message.</dd>
<dt>PVDatabase</dt>
<dd>This is a database of PVRecords.</dd>
</dl>
<p>Each class is described in a separate subsection.</p>
<h3>C++ namespace and typedefs</h3>
<pre>
namespace epics { namespace pvDatabase {
class PVRecord;
typedef std::tr1::shared_ptr&lt;PVRecord&gt; PVRecordPtr;
typedef std::map&lt;epics::pvData::String,PVRecordPtr&gt; PVRecordMap;
class PVRecordField;
typedef std::tr1::shared_ptr&lt;PVRecordField&gt; PVRecordFieldPtr;
typedef std::vector&lt;PVRecordFieldPtr&gt; PVRecordFieldPtrArray;
typedef std::tr1::shared_ptr&lt;PVRecordFieldPtrArray&gt; PVRecordFieldPtrArrayPtr;
class PVRecordStructure;
typedef std::tr1::shared_ptr&lt;PVRecordStructure&gt; PVRecordStructurePtr;
class PVRecordClient;
typedef std::tr1::shared_ptr&lt;PVRecordClient&gt; PVRecordClientPtr;
class PVListener;
typedef std::tr1::shared_ptr&lt;PVListener&gt; PVListenerPtr;
class PVDatabase;
typedef std::tr1::shared_ptr&lt;PVDatabase&gt; PVDatabasePtr;
</pre>
<h3>class PVRecord</h3>
<p>NOTES:</p>
<ul>
<li>This section uses the name record instead of "an instance of PVRecord".</li>
<li>Most clients will access a record via the local channel provider,
i. e. via pvAccess.
Thus this section is mainly of interest to
the local channel provider and record implementers.</li>
<li>Most readers will not care about most of the PVRecord methods.
Most of the methods are used by the pvAccess code.
Service implementers will mostly be interested in methods init and process.
These are described first.
</li>
</ul>
<h4>PVRecord Methods</h4>
<pre>
class PVRecord
public std::tr1::enable_shared_from_this&lt;PVRecord&gt;
{
public:
POINTER_DEFINITIONS(PVRecord);
virtual bool init() ;
virtual void start() {}
virtual void process() {}
virtual void destroy();
static PVRecordPtr create(
std::string const &amp; recordName,
epics::pvData::PVStructurePtr const &amp; pvStructure);
virtual ~PVRecord();
std::string getRecordName();
PVRecordStructurePtr getPVRecordStructure();
PVRecordFieldPtr findPVRecordField(
epics::pvData::PVFieldPtr const &amp; pvField);
void lock();
void unlock();
bool tryLock();
void lockOtherRecord(PVRecordPtr const &amp; otherRecord);
bool addPVRecordClient(PVRecordClientPtr const &amp; pvRecordClient);
bool removePVRecordClient(PVRecordClientPtr const &amp; pvRecordClient);
void detachClients();
bool addListener(PVListenerPtr const &amp; pvListener);
bool removeListener(PVListenerPtr const &amp; pvListener);
ServicePtr getService(PVStructurePtr const &amp; pvRequest)
void beginGroupPut();
void endGroupPut();
int getTraceLevel();
void setTraceLevel(int level);
protected:
PVRecord(
std::string const &amp; recordName,
epics::pvData::PVStructurePtr const &amp; pvStructure);
void initPVRecord();
epics::pvData::PVStructurePtr getPVStructure();
PVRecordPtr getPtrSelf()
{
return shared_from_this();
}
private:
...
}
</pre>
<p>The methods are:</p>
<dl>
<dt>init</dt>
<dd>Virtual method.
Derived classes must implement this method.
This method Must call initPVRecord.
</dd>
<dt>start</dt>
<dd>Virtual method.
Optional method for derived class.
It is called before record is added to database.
The base method does nothing.
</dd>
<dt>process</dt>
<dd>Virtual method.
Derived classes usually implement this method.
It implements the semantics for the record.
<br />
If a top level timeStamp exists the base class set it equal
to the current time.
</dd>
<dt>destroy</dt>
<dd>
Destroy the PVRecord and any context.
<br />
Release any resources used and get rid of listeners and requesters.
If derived class overrides this then it must call this base class destroy()
after it has destroyed any resorces it uses.
<br />
It can be called for several reasons.
Some examples are:
<ul>
<li>By pvDatabase when it is destroyed.</li>
<li>By other code that wants to destroy the record</li>
</ul>
</dd>
<dt>create</dt>
<dd>Static method to create a soft record.
A soft record implements process by setting an optional top level timeStamp
to the current time.
<br />
A derived class should have it's own static create method.
</dd>
<dt>~PVRecord</dt>
<dd>
This calls destroy.
</dd>
<dt>getRecordName</dt>
<dd>Return the recordName.</dd>
<dt>getPVRecordStructure</dt>
<dd>Get the top level PVStructure.</dd>
<dt>findPVRecordField</dt>
<dd>Given a PVFieldPtr return the PVRecordFieldPtr for the field.</dd>
<dt>lock and unlock</dt>
<dd>Lock and Unlock the record.
Any code accessing the data in the record or calling other PVRecord methods
must have the record locked.</dd>
<dt>tryLock</dt>
<dd>If true then just like lock.
If false client can not access record.
A client can try to simultaneously hold the lock for more than two records
by calling this method. But must be willing to accept failure.
</dd>
<dt>lockOtherRecord</dt>
<dd>A client that holds the lock for one record can lock one other record.
A client must not call this if the client already has the lock for
more then one record.
</dd>
<dt>addPVRecordClient</dt>
<dd>
Every client that accesses the record must call this so that
the client can be notified when the record is deleted.
</dd>
<dt>removePVRecordClient</dt>
<dd>
Client is no longer accessing the record.
</dd>
<dt>detachClients</dt>
<dd>
Ask all clients to detach from the record
</dd>
<dt>addListener</dt>
<dd>
Add a PVListener.
This must be called before calling pvRecordField.addListener.
</dd>
<dt>removeListener</dt>
<dd>
Removes a listener.
The listener will also be removed from all fields to which it is attached.
</dd>
<dt>getService</dt>
<dd>
Virtual method.
A derived class implements this method if it supports channelRPC.
It implements the semantics for the channelRPC.
The base class returns null.
</dd>
<dt>beginGroupPut</dt>
<dd>Begin a group of puts.
This results in all registered PVListeners being called</dd>
<dt>endGroupPut</dt>
<dd>End a group of puts.
This results in all registered PVListeners being called.</dd>
<dt>getTraceLevel</dt>
<dd>This can be used for debugging. There are currently three
levels that are used by existing code.
<dl>
<dt>0</dt>
<dd>Produce no trace messages.</dd>
<dt>1</dt>
<dd>Issue a message to std::cout whenever anything is created
or destroyed.</dd>
<dt>2</dt>
<dd>In addition to lifetime messages also issue a message
whenever the record is accessed by pvAccess client.</dd>
</dl>
</dd>
<dt>setTraceLevel</dt>
<dd>Set the trace level. Note that special, described below.
provides a record support that allows a pvAccess client
to set the trace level of a record.</dd>
</dl>
<p>The protected methods are:</p>
<dl>
<dt>PVRecord</dt>
<dd>The constructor. It requires a recordName and a top level PVStructure.</dd>
<dt>initPVRecord</dt>
<dd>This method must be called by derived class.</dd>
<dt>getPVStructure</dt>
<dd>Called by derived class.</dd>
</dl>
<h3>class PVRecordField</h3>
<pre>
class PVRecordField {
public virtual epics::pvData::PostHandler,
public std::tr1::enable_shared_from_this&lt;PVRecordField&gt;
public:
POINTER_DEFINITIONS(PVRecordField);
PVRecordField(
epics::pvData::PVFieldPtr const &amp; pvField,
PVRecordStructurePtr const &amp; parent,
PVRecordPtr const &amp; pvRecord);
virtual ~PVRecordField();
virtual void destroy();
PVRecordStructurePtr getParent();
epics::pvData::PVFieldPtr getPVField();
std::string getFullFieldName();
std::string getFullName();
PVRecordPtr getPVRecord();
bool addListener(PVListenerPtr const &amp; pvListener);
virtual void removeListener(PVListenerPtr const &amp; pvListener);
virtual void postPut();
protected:
PVRecordFieldPtr getPtrSelf()
{
return shared_from_this();
}
virtual void init();
virtual void postParent(PVRecordFieldPtr const &amp; subField);
virtual void postSubField();
private:
...
};
</pre>
<p>When PVRecord is created it creates a PVRecordField for every field in the PVStructure
that holds the data. It has the following methods:
</p>
<dl>
<dt>PVRecordField</dt>
<dd>The constructor.</dd>
<dt>~PVRecordField</dt>
<dd>The destructor.</dd>
<dt>destroy</dt>
<dd>Called by PVRecordStructure when it's destroy method is called.</dd>
<dt>getParent</dt>
<dd>Get the parent PVRecordStructure for this field.</dd>
<dt>getPVField</dt>
<dd>Get the PVField associated with this PVRecordField.</dd>
<dt>getFullFieldName</dt>
<dd>This gets the full name of the field, i.e. field,field,..</dd>
<dt>getFullName</dt>
<dd>This gets recordName plus the full name of the field, i.e. recordName.field,field,..</dd>
<dt>getPVRecord</dt>
<dd>Returns the PVRecord to which this field belongs.</dd>
<dt>addListener</dt>
<dd>Add A PVListener to this field.
Whenever this field or any subfield if this field is modified the listener will be notified.
PVListener is described below.
Before a listener can call addListener it must first call PVRecord.registerListener.</dd>
<dt>removeListener</dt>
<dd>Remove a PVListener.</dd>
<dt>postPut</dt>
<dd>This is called by the code that implements the data interface.
It is called whenever the put method is called.</dd>
</dl>
<h3>class PVRecordStructure</h3>
<pre>
class PVRecordStructure : public PVRecordField {
public:
POINTER_DEFINITIONS(PVRecordStructure);
PVRecordStructure(
epics::pvData::PVStructurePtr const &amp; pvStructure,
PVRecordStructurePtr const &amp; parent,
PVRecordPtr const &amp; pvRecord);
virtual ~PVRecordStructure();
virtual void destroy();
PVRecordFieldPtrArrayPtr getPVRecordFields();
epics::pvData::PVStructurePtr getPVStructure();
virtual void removeListener(PVListenerPtr const &amp; pvListener);
virtual void postPut();
protected:
virtual void init();
private:
...
};
</pre>
<p>When PVRecord is created it creates a PVRecordStructure for every structure field in the PVStructure
that holds the data. It has the following methods:
</p>
<dl>
<dt>PVRecordStructure</dt>
<dd>The constructor.</dd>
<dt>~PVRecordStructure</dt>
<dd>The destructor.</dd>
<dt>getPVRecordFields</dt>
<dd>Get the PVRecordField array for the subfields</dd>
<dt>getPVStructure</dt>
<dd>Get the PVStructure for this field.</dd>
<dt>removeListener</dt>
<dd>Remove a PVListener.</dd>
<dt>postPut</dt>
<dd>This is called by the code that implements the data interface.
It is called whenever the put method is called.</dd>
</dl>
<h3>class PVRecordClient</h3>
<pre>
class PVRecordClient {
POINTER_DEFINITIONS(PVRecordClient);
virtual ~PVRecordClient();
virtual void detach(PVRecordPtr const &amp; pvRecord);
};
</pre>
<p>where</p>
<dl>
<dt>~PVRecordClient</dt>
<dd>The destructor.</dd>
<dt>detach</dt>
<dd>The record is being removed from the master database,</dd>
</dl>
<h3>class PVListener</h3>
<pre>
class PVListener {
virtual public PVRecordClient
public:
POINTER_DEFINITIONS(PVListener);
virtual ~PVListener();
virtual void dataPut(PVRecordFieldPtr const &amp; pvRecordField) = 0;
virtual void dataPut(
PVRecordStructurePtr const &amp; requested,
PVRecordFieldPtr const &amp; pvRecordField) = 0;
virtual void beginGroupPut(PVRecordPtr const &amp; pvRecord) = 0;
virtual void endGroupPut(PVRecordPtr const &amp; pvRecord) = 0;
virtual void unlisten(PVRecordPtr const &amp; pvRecord);
};
</pre>
<p>where</p>
<dl>
<dt>~PVListener</dt>
<dd>The destructor.</dd>
<dt>dataPut(PVRecordFieldPtr const &amp; pvRecordField)</dt>
<dd>pvField has been modified.
This is called if the listener has called PVRecordField::addListener for pvRecordField.</dd>
<dt>dataPut(
PVRecordStructurePtr const &amp;
requested,PVRecordFieldPtr const &amp; pvRecordField)</dt>
<dd>pvField has been modified.
Requested is the field to which the requester issued a pvField-&gt;addListener.
This is called if the listener has called PVRecordField-&gt;addListener for requested.</dd>
<dt>beginGroupPut</dt>
<dd>A related set of changes is being started.</dd>
<dt>endGroupPut</dt>
<dd>A related set of changes is done.</dd>
<dt>unlisten</dt>
<dd>The record is being destroyed. The listener must release all
access to the record.</dd>
</dl>
<h3>class PVDatabase</h3>
<pre>
class PVDatabase : virtual public epics::pvData::Requester {
public:
POINTER_DEFINITIONS(PVDatabase);
static PVDatabasePtr getMaster();
virtual ~PVDatabase();
virtual void destroy();
PVRecordPtr findRecord(std::string const &amp; recordName);
bool addRecord(PVRecordPtr const &amp; record);
epics::pvData::PVStringArrayPtr getRecordNames();
bool removeRecord(PVRecordPtr const &amp; record);
private:
PVDatabase();
};
</pre>
<p>where</p>
<dl>
<dt>getMaster</dt>
<dd>Get the master database. This is the database that localChannelProvider access.</dd>
<dt>~PVDatabase</dt>
<dd>
The destructor.
</dd>
<dt>destroy</dt>
<dd>
This is called by remote channelAccess when process exits.
This destroys and removes all records in the PVDatabase.
</dd>
<dt>findRecord</dt>
<dd>Find a record. An empty pointer is returned if the record is not in the database.</dd>
<dt>addRecord</dt>
<dd>Add a record to the database.
If the record already exists it is not modified and false is returned.</dd>
<dt>getRecordNames</dt>
<dd>Returns an array of all the record names.</dd>
<dt>removeRecord</dt>
<dd>Remove a record from the database.
If the record was not in the database false is returned.</dd>
</dl>
<h2>pvAccess</h2>
<p>This is code that provides an implementation of channelProvider as
defined by pvAccess.
It provides access to PVRecords and is accessed by the server side of remote pvAccess.
It uses the copy and monitor facilities from pvDataCPP and connects
them to a PVRecord.
</p>
<p>The implementation is a complete implementation of channelProvider
and channel.</p>
<p>The following provides a brief description of each channel method that
is implemented.</p>
<h3>channelProcessLocal</h3>
<p>Implements channelProcess.</p>
<h3>channelGetLocal</h3>
<p>Implements channelGet.</p>
<h3>channelPutLocal</h3>
<p>Implements channelPut.</p>
<h3>channelPutGetLocal</h3>
<p>Implements channelPutGet.</p>
<h3>channelArrayLocal</h3>
<p>Implements channelArray.</p>
<h3>ChannelRPCLocal</h3>
<p>Implements channelRPC.</p>
<h3>MonitorLocal</h3>
<p>This is the code that implements monitors on changes to fields of a PVRecord.
Because it is called by pvAccess client (monitor methods) and by
PVRecord (when postPut is called), it must be careful to prevent deadlocks.
The implementation is via class MonitorLocal (implemented in monitorFactory.cpp)
and PVCopyMonitor.
MonitorLocal is the interface between pvAccess and PVCopyMonitor.
PVCopyMonitor is the interface between MonitorLocal and PVRecord.
MonitorLocal manages a MonitorElement queue.
While monitoring is active (between start and stop) it keeps an active element
for use by PVCopyMonitor.
While monitoring is active PVCopyMonitor updates the active monitor element whenever
a postPut is issued to any field being monitored.
</p>
<p>The following two sections provide a few more details about MonitorLocal
and PVCopyMonitor.</p>
<h4>MonitorLocal</h4>
<p>MonitorLocal implements the following abstract base classes:</p>
<dl>
<dt>Monitor</dt>
<dd>This is described by pvDataCPP.
It has methods start, stop, poll, and release.
These methods are called by the pvAccess client
</dd>
<dt>PVCopyMonitorRequester</dt>
<dd>This has methods releaseActiveElement and unlisten.
These methods are called by PVCopyMonitor.
</dd>
</dl>
MonitorLocal manages the following:
<dl>
<dt>MonitorElementQueue</dt>
<dd>This is a queue of monitor elements.
A Queue is implemented by pvDataCPP and used by MonitorLocal.
It is a finite queue.
A monitor element is described by pvDataCPP.
It has fields pvStructure, changedBitSet, and overrunBitSet.
The pvStructure holds data for a subset of the fields in a PVRecord.
The changedBitSet and overrunBitSet describe changes between
monitor event.
MonitorLocal creates an instance of PVCopy (implemented by pvDataCPP),
which manages the interaction between the set of fields being
monitored and the fields in the top level PVStructure of the PVRecord.
pvCopy is also used to create the pvStructure for each monitor element.
</dd>
<dt>activeElement</dt>
<dd>Whenever monitoring is active monitorLocal
keeps an active element for use by pvCopyMonitor.
It changes the active element based on calls to poll (by the
client) and calls to releaseActiveElement (by pvCopyMonitor).
If there are no free element when releaseActiveElement is
called the current active element is returned.
If a free element is available the client is notified that a new
monitor element is available and the free element becomes the
active element.
</dd>
</dl>
<p>A brief description on each method in MonitorLocal is:</p>
<dl>
<dt>start</dt>
<dd>
Called by client.
With a lock held it clears the monitorElement queue
and allocates an active element.
With no lock held calls pvCopyMonitor-&gt;startMonitoring(activeElement)
</dd>
<dt>stop</dt>
<dd>
Called by client.
With no lock held calls pvCopyMonitor-&gt;stopMonitoring(activeElement)
</dd>
<dt>poll</dt>
<dd>
Called by client.
With a lock held it calls queue-&gt;getUsed();
</dd>
<dt>release</dt>
<dd>
Called by client.
With a lock held it calls queue-&gt;releaseUsed();
</dd>
<dt>releaseActiveElement</dt>
<dd>
Called by PVCopyMonitor with no locks held.
With a lock held it tries to get a new free element.
If it can't it just returns the current active element.
Otherwise it does the following.
Using the activeElement it updates the pvStructure
and compresses the changed and overrun bitSet.
It then calls queue-&gt;setUsed(activeElement);
It then sets the active element to the new free element.
With no lock held it calls monitorRequester-&gt;monitorEvent(getPtrSelf())
and finally returns the new active element,
</dd>
<dt>unlisten</dt>
<dd>
With no lock held it calls monitorRequester-&gt;unlisten(getPtrSelf());
</dd>
</dl>
<h4>PVCopyMonitor</h4>
<p>
pvCopyMonitor is the code that manages changes to
fields in the record.
It is called by PVRecord whenever a postPut is issued to a field.
pvCopyMonitor uses the active monitor element provided by monitorFactory.
Note that this method is called with the record locked.
It only modifies the changedBitSet and overrunBitSet of the
active element but never modifies the pvStructure.
</p>
<p>A brief description of the pvCopyMonitor methods is:</p>
<dl>
<dt>startMonitoring</dt>
<dd>With no lock held it sets its monitorElement to the
startElement passed by monitorLocal and calls pvRecord-&gt;addListener(getPtrSelf()).
It locks the pvRecord.
It calls calls addListener for every field in the record that is being
monitored.
It clears the overrun and changed bit sets.
It sets bit 0 of the changed bit set and calls
pvCopyMonitorRequester-&gt;releaseActiveElement();
Thus the client will get the initial values for every field being monitored.
The record is unlocked and the method returns to the caller.
</dd>
<dt>stopMonitoring</dt>
<dd>
With no lock held it calls pvRecord-&gt;removeListener(getPtrSelf());
</dd>
<dt>dataPut</dt>
<dd>
This is called because of a call to postPut.
It is called with the record locked.
It updates the changed and overrun bitSets.
It isGroupPut is false it calls
pvCopyMonitorRequester-&gt;releaseActiveElement().
Otherwise it sets dataChanged true.
</dd>
<dt>beginGroupPut</dt>
<dd>
With a lock held it
sets isGroupPut true and dataChanged false.
</dd>
<dt>endGroupPut</dt>
<dd>
With a lock held it sets isGroupPut false.
With no lock held and dataChanged true it calls
pvCopyMonitorRequester-&gt;releaseActiveElement()
</dd>
<dt>unlisten</dt>
<dd>
Just calls pvCopyMonitorRequester-&gt;unlisten();
</dd>
</dl>
<h2>special</h2>
<p>This section provides <b>traceRecord</b> which implements a PVRecord that allows a client to set
the trace level of another PVRecord. It follows the pattern of a channelPutGet
record:</p>
<pre>
traceRecord
structure argument
string recordName
int level 0
structure result
string status
</pre>
where:
<dl>
<dt>recordName</dt>
<dd>The name of the record to set the trace level.</dd>
<dt>level</dt>
<dd>The level to set. The meaning is:
<dl>
<dt>0</dt>
<dd>No trace messages generated</dd>
<dt>1</dt>
<dd>Lifecycle messages will be generated.
This all channel create and destroy instances will be shown.</dd>
<dt>2</dt>
<dd>In addition to lifecycle messages a message will be generated
for each get and put request.</dd>
<dt>&gt;2</dt>
<dd>Currently no definition</dd>
</dl>
</dd>
<dt>result</dt>
<dd>The result of a cannelPutGet request</dd>
</dl>
<p>testExampleServerMain.cpp has an example of how to create a traceRecord:</p>
<pre>
PVDatabasePtr master = PVDatabase::getMaster();
PVRecordPtr pvRecord;
String recordName;
bool result(false);
recordName = "traceRecordPGRPC";
pvRecord = TraceRecord::create(recordName);
result = master-&gt;addRecord(pvRecord);
if(!result) cout&lt;&lt; "record " &lt;&lt; recordName &lt;&lt; " not added" &lt;&lt; endl;
</pre>
</div>
</body>
</html>

89
src/pv/channelProviderLocal.h
View File

@ -67,15 +67,16 @@ class epicsShareClass MonitorFactory
public:
POINTER_DEFINITIONS(MonitorFactory);
/**
* Destructor
* @brief Destructor
*/
virtual ~MonitorFactory();
/**
* Destroy the monitor factory.
* @brief Destroy the monitor factory.
*/
virtual void destroy();
/**
* Create a monitor on a record.
* @brief Create a monitor on a record.
*
* This is called by the local channel provider.
* @param pvRecord The record to monitor.
* @param monitorRequester The client callback.
@ -113,21 +114,22 @@ class epicsShareClass ChannelProviderLocal :
public:
POINTER_DEFINITIONS(ChannelProviderLocal);
/**
* Destructor
* @brief Destructor
*/
virtual ~ChannelProviderLocal();
/**
* Destroy the channel provider.
* @brief Destroy the channel provider.
*
* Probably never called.
*/
virtual void destroy();
/**
* Returns the channel provider name.
* @brief Returns the channel provider name.
* @return <b>local</b>
*/
virtual std::string getProviderName();
/**
* Returns either a null channelFind or a channelFind for records in the PVDatabase.
* @brief Returns either a null channelFind or a channelFind for records in the PVDatabase.
* @param channelName The name of the channel desired.
* @param channelFindRequester The client callback.
* @return shared pointer to ChannelFind.
@ -142,8 +144,9 @@ public:
std::string const &channelName,
epics::pvAccess::ChannelFindRequester::shared_pointer const & channelFindRequester);
/**
* Calls method channelListRequester::channelListResult which provides the
* caller with a list of the record names on the PVDatabase.
* @brief Calls method channelListRequester::channelListResult.
*
* This provides the caller with a list of the record names on the PVDatabase.
* A record name is the same as a channel name.
* @param channelListRequester The client callback.
* @return shared pointer to ChannelFind.
@ -152,7 +155,8 @@ public:
virtual epics::pvAccess::ChannelFind::shared_pointer channelList(
epics::pvAccess::ChannelListRequester::shared_pointer const & channelListRequester);
/**
* Create a channel for a record.
* @brief Create a channel for a record.
*
* This method just calls the next method with a address of "".
* @param channelName The name of the channel desired.
* @param channelRequester The client callback.
@ -164,7 +168,7 @@ public:
epics::pvAccess::ChannelRequester::shared_pointer const &channelRequester,
short priority);
/**
* Create a channel for a record.
* @brief Create a channel for a record.
* @param channelName The name of the channel desired.
* @param channelRequester The callback to call with the result.
* @param priority The priority.
@ -219,11 +223,12 @@ public:
PVRecordPtr const & pvRecord
);
/**
* Destructor
* @brief Destructor
*/
virtual ~ChannelLocal();
/**
* Destroy the channel.
* @brief Destroy the channel.
*
* It cleans up all resources used to access the record.
* Note that this assumes that client has destroyed any objects that
* have been created for the channel like channelGet, etc.
@ -231,18 +236,20 @@ public:
*/
virtual void destroy();
/**
* @brief Detach from the record.
*
* This is called when a record is being removed from the database.
* Calls destroy.
* @param pvRecord The record being destroyed.
*/
virtual void detach(PVRecordPtr const &pvRecord);
/**
* Get the requester name.
* @brief Get the requester name.
* @return returns the name of the channel requester.
*/
virtual std::string getRequesterName();
/**
* Passes the message to the channel requester.
* @brief Passes the message to the channel requester.
* @param message The message.
* @param messageType The message type.
*/
@ -250,7 +257,7 @@ public:
std::string const & message,
epics::pvData::MessageType messageType);
/**
* Get the channel provider
* @brief Get the channel provider
* @return The provider.
*/
virtual epics::pvAccess::ChannelProvider::shared_pointer getProvider()
@ -258,7 +265,7 @@ public:
return provider;
}
/**
* Get the remote address
* @brief Get the remote address
* @return <b>local</b>
*/
virtual std::string getRemoteAddress();
@ -268,22 +275,23 @@ public:
*/
virtual epics::pvAccess::Channel::ConnectionState getConnectionState();
/**
* Get the channel name.
* @brief Get the channel name.
* @return the record name.
*/
virtual std::string getChannelName();
/**
* Get the channel requester
* @brief Get the channel requester
* @return The channel requester.
*/
virtual epics::pvAccess::ChannelRequester::shared_pointer getChannelRequester();
/**
* Is the channel connected?
* @return true
* @brief Is the channel connected?
* @return true.
*/
virtual bool isConnected();
/**
* Get the introspection interface for subField.
* @brief Get the introspection interface for subField.
*
* The introspection interface is given via GetFieldRequester::getDone.
* @param requester The client callback.
* @param subField The subField of the record.
@ -301,8 +309,8 @@ public:
virtual epics::pvAccess::AccessRights getAccessRights(
epics::pvData::PVField::shared_pointer const &pvField);
/**
* Create a channelProcess.
* See pvAccess.html for details.
* @brief Create a channelProcess.
*
* @param requester The client callback.
* @param pvRequest The options specified by the client.
* @return A shared pointer to the newly created implementation.
@ -312,8 +320,8 @@ public:
epics::pvAccess::ChannelProcessRequester::shared_pointer const &requester,
epics::pvData::PVStructurePtr const &pvRequest);
/**
* Create a channelGet.
* See pvAccess.html for details.
* @brief Create a channelGet.
*
* @param requester The client callback.
* @param pvRequest The options specified by the client.
* @return A shared pointer to the newly created implementation.
@ -323,8 +331,8 @@ public:
epics::pvAccess::ChannelGetRequester::shared_pointer const &requester,
epics::pvData::PVStructurePtr const &pvRequest);
/**
* Create a channelPut.
* See pvAccess.html for details.
* @brief Create a channelPut.
*
* @param requester The client callback.
* @param pvRequest The options specified by the client.
* @return A shared pointer to the newly created implementation.
@ -334,8 +342,8 @@ public:
epics::pvAccess::ChannelPutRequester::shared_pointer const &requester,
epics::pvData::PVStructurePtr const &pvRequest);
/**
* Create a channelPutGet.
* See pvAccess.html for details.
* @brief Create a channelPutGet.
*
* @param requester The client callback.
* @param pvRequest The options specified by the client.
* @return A shared pointer to the newly created implementation.
@ -345,10 +353,9 @@ public:
epics::pvAccess::ChannelPutGetRequester::shared_pointer const &requester,
epics::pvData::PVStructurePtr const &pvRequest);
/**
* Create a channelRPC.
* This is not implemented because pvAccessCPP implements channelRPC.
* The server side of remote pvAccess implements a channel provider
* just for channelRPC.
* @brief Create a channelRPC.
*
* The PVRecord must implement <b>getService</b> or an empty shared pointer is returned.
* @param requester The client callback
* @param pvRequest The options specified by the client.
* @return null.
@ -357,8 +364,8 @@ public:
epics::pvAccess::ChannelRPCRequester::shared_pointer const &requester,
epics::pvData::PVStructurePtr const &pvRequest);
/**
* Create a monitor.
* See pvAccess.html for details.
* @brief Create a monitor.
*
* @param requester The client callback.
* @param pvRequest The options specified by the client.
* @return A shared pointer to the newly created implementation.
@ -368,8 +375,8 @@ public:
epics::pvData::MonitorRequester::shared_pointer const &requester,
epics::pvData::PVStructurePtr const &pvRequest);
/**
* Create a channelArray.
* See pvAccess.html for details.
* @brief Create a channelArray.
*
* @param requester The client callback.
* @param pvRequest The options specified by the client.
* @return A shared pointer to the newly created implementation.
@ -379,12 +386,12 @@ public:
epics::pvAccess::ChannelArrayRequester::shared_pointer const &requester,
epics::pvData::PVStructurePtr const &pvRequest);
/**
* calls printInfo(std::cout);
* @brief calls printInfo(std::cout);
*/
virtual void printInfo();
/**
* displays a message
* "ChannelLocal provides access to a record in the local PVDatabase".
* @brief displays a message
*
* @param out the stream on which the message is displayed.
*/
virtual void printInfo(std::ostream& out);

309
src/pv/pvDatabase.h
View File

@ -1,13 +1,8 @@
/* pvDatabase.h */
/**
* 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 2012.11.20
*/
#ifndef PVDATABASE_H
#define PVDATABASE_H
@ -60,9 +55,13 @@ class PVDatabase;
typedef std::tr1::shared_ptr<PVDatabase> PVDatabasePtr;
/**
* @brief Base interface for a record.
* @brief Base interface for a PVRecord.
*
* It is also a complete implementation for <b>soft</b> records.
* A soft record is a record where method <b>process</b> sets an
* optional top level timeStamp field to the current time and does nothing else.
* @author mrk
* @date 2012.11.20
*/
class epicsShareClass PVRecord :
public epics::pvData::PVCopyTraverseMasterCallback,
@ -75,19 +74,21 @@ public:
*/
virtual ~PVRecord();
/**
* Virtual initialization method.
* Must be implemented by derived classes.
* This method <b>Must</b> call initPVRecord.
* @brief Optional initialization method.
*
* A derived method <b>Must</b> call initPVRecord.
* @return <b>true</b> for success and <b>false</b> for failure.
*/
virtual bool init() {initPVRecord(); return true;}
/**
* Optional method for derived class.
* @brief Optional method for derived class.
*
* It is called before record is added to database.
*/
virtual void start() {}
/**
* Optional method.
* @brief Optional method for derived class.
*
* It is the method that makes a record smart.
* If it encounters errors it should raise alarms and/or
* call the <b>message</b> method provided by the base class.
@ -96,6 +97,8 @@ public:
*/
virtual void process();
/**
* @brief Optional method for derived class.
*
* Destroy the PVRecord. Release any resources used and
* get rid of listeners and requesters.
* If derived class overrides this then it must call PVRecord::destroy()
@ -103,99 +106,8 @@ public:
*/
virtual void destroy();
/**
* Creates a <b>soft</b> record.
* @param recordName The name of the record, which is also the channelName.
* @param pvStructure The top level structure.
* @return A shared pointer to the newly created record.
*/
static PVRecordPtr create(
std::string const & recordName,
epics::pvData::PVStructurePtr const & pvStructure);
/**
* Get the name of the record.
* @return The name.
*/
std::string getRecordName() const { return recordName;}
/**
* Get the top level PVRecordStructure.
* @return The shared pointer.
*/
PVRecordStructurePtr getPVRecordStructure() const { return pvRecordStructure;}
/**
* Convenience method for derived classes.
* @return The top level PVStructure.
*/
epics::pvData::PVStructurePtr getPVStructure() const { return pvStructure;}
/**
* Find the PVRecordField for the PVField.
* @param pvField The PVField.
* @return The shared pointer to the PVRecordField.
*/
PVRecordFieldPtr findPVRecordField(
epics::pvData::PVFieldPtr const & pvField);
/**
* Lock the record.
* Any code must lock while accessing a record.
*/
void lock();
/**
* Unlock the record.
*/
void unlock();
/**
* If <b>true</b> then just like <b>lock</b>.
* If <b>false</b>client can not access record.
* Code can try to simultaneously hold the lock for more than two records
* by calling this method but must be willing to accept failure.
* @return <b>true</b> if the record is locked.
*/
bool tryLock();
/**
* A client that holds the lock for one record can lock one other record.
* A client <b>must</b> not call this if the client already has the lock for
* more then one record.
* @brief Optional method for derived class.
*
* @param otherRecord The other record to lock.
*/
void lockOtherRecord(PVRecordPtr const & otherRecord);
/**
* Every client that accesses the record must call this so that the
* client can be notified when the record is deleted.
* @param pvRecordClient The client.
* @return <b>true</b> if the client is added.
*/
bool addPVRecordClient(PVRecordClientPtr const & pvRecordClient);
/**
* Remove a client.
* @param pvRecordClient The client.
* @return <b>true</b> if the client is removed.
*/
bool removePVRecordClient(PVRecordClientPtr const & pvRecordClient);
/**
* Add a PVListener.
* This must be called before calling pvRecordField.addListener.
* @param pvListener The listener.
* @param pvCopy The pvStructure that has the client fields.
* @return <b>true</b> if the listener was added.
*/
bool addListener(
PVListenerPtr const & pvListener,
epics::pvData::PVCopyPtr const & pvCopy);
/*
* PVCopyTraverseMasterCallback method
* @param pvField The next client field.
*/
void nextMasterPVField(epics::pvData::PVFieldPtr const & pvField);
/**
* Remove a listener.
* @param pvListener The listener.
* @param pvCopy The pvStructure that has the client fields.
* @return <b>true</b> if the listener was removed.
*/
bool removeListener(
PVListenerPtr const & pvListener,
epics::pvData::PVCopyPtr const & pvCopy);
/**
* Return a service corresponding to the specified request PVStructure.
* @param pvRequest The request PVStructure
* @return The corresponding service
@ -205,28 +117,141 @@ public:
{
return epics::pvAccess::Service::shared_pointer();
}
/**
* @brief Creates a <b>soft</b> record.
*
* @param recordName The name of the record, which is also the channelName.
* @param pvStructure The top level structure.
* @return A shared pointer to the newly created record.
*/
static PVRecordPtr create(
std::string const & recordName,
epics::pvData::PVStructurePtr const & pvStructure);
/**
* @brief Get the name of the record.
*
* @return The name.
*/
std::string getRecordName() const { return recordName;}
/**
* @brief Get the top level PVRecordStructure.
*
* @return The shared pointer.
*/
PVRecordStructurePtr getPVRecordStructure() const { return pvRecordStructure;}
/**
* @brief Get the top level PVStructure.
*
* @return The top level PVStructure.
*/
epics::pvData::PVStructurePtr getPVStructure() const { return pvStructure;}
/**
* @brief Find the PVRecordField for the PVField.
*
* This is called by the pvCopy facility.
* @param pvField The PVField.
* @return The shared pointer to the PVRecordField.
*/
PVRecordFieldPtr findPVRecordField(
epics::pvData::PVFieldPtr const & pvField);
/**
* @brief Lock the record.
*
* Any code must lock while accessing a record.
*/
void lock();
/**
* @brief Unlock the record.
*
* The code that calls lock must unlock when done accessing the record.
*/
void unlock();
/**
* @brief Try to lock the record.
*
* If <b>true</b> then just like <b>lock</b>.
* If <b>false</b>client can not access record.
* Code can try to simultaneously hold the lock for more than two records
* by calling this method but must be willing to accept failure.
* @return <b>true</b> if the record is locked.
*/
bool tryLock();
/**
* @brief Lock another record.
*
* A client that holds the lock for one record can lock one other record.
* A client <b>must</b> not call this if the client already has the lock for
* more then one record.
*
* @param otherRecord The other record to lock.
*/
void lockOtherRecord(PVRecordPtr const & otherRecord);
/**
* @brief Add a client that wants to access the record.
*
* Every client that accesses the record must call this so that the
* client can be notified when the record is deleted.
* @param pvRecordClient The client.
* @return <b>true</b> if the client is added.
*/
bool addPVRecordClient(PVRecordClientPtr const & pvRecordClient);
/**
* @brief Remove a client.
*
* @param pvRecordClient The client.
* @return <b>true</b> if the client is removed.
*/
bool removePVRecordClient(PVRecordClientPtr const & pvRecordClient);
/**
* @brief Add a PVListener.
*
* This must be called before calling pvRecordField.addListener.
* @param pvListener The listener.
* @param pvCopy The pvStructure that has the client fields.
* @return <b>true</b> if the listener was added.
*/
bool addListener(
PVListenerPtr const & pvListener,
epics::pvData::PVCopyPtr const & pvCopy);
/**
* @brief PVCopyTraverseMasterCallback method
*
* @param pvField The next client field.
*/
void nextMasterPVField(epics::pvData::PVFieldPtr const & pvField);
/**
* @brief Remove a listener.
*
* @param pvListener The listener.
* @param pvCopy The pvStructure that has the client fields.
* @return <b>true</b> if the listener was removed.
*/
bool removeListener(
PVListenerPtr const & pvListener,
epics::pvData::PVCopyPtr const & pvCopy);
/**
* Begins a group of puts.
* @brief Begins a group of puts.
*/
void beginGroupPut();
/**
* Ends a group of puts.
* @brief Ends a group of puts.
*/
void endGroupPut();
/**
* get trace level (0,1,2) means (nothing,lifetime,process)
* @brief get trace level (0,1,2) means (nothing,lifetime,process)
* @return the level
*/
int getTraceLevel() {return traceLevel;}
/**
* set trace level (0,1,2) means (nothing,lifetime,process)
* @brief set trace level (0,1,2) means (nothing,lifetime,process)
* @param level The level
*/
void setTraceLevel(int level) {traceLevel = level;}
protected:
/**
* Constructor
* @brief Constructor
* @param recordName The name of the record
* @param pvStructure The top level PVStructutre
*/
@ -234,10 +259,13 @@ protected:
std::string const & recordName,
epics::pvData::PVStructurePtr const & pvStructure);
/**
* Initializes the base class. Must be called by derived classes.
* @brief Initializes the base class.
*
* Must be called by derived classes.
*/
void initPVRecord();
/** Get shared pointer to self
/**
* @brief Get shared pointer to self.
* @return The shared pointer.
*/
PVRecordPtr getPtrSelf()
@ -282,7 +310,8 @@ class epicsShareClass PVRecordField :
public:
POINTER_DEFINITIONS(PVRecordField);
/**
* Constructor.
* @brief Constructor.
*
* @param pvField The field from the top level structure.
* @param parent The parent.
* @param pvRecord The PVRecord.
@ -292,36 +321,38 @@ public:
PVRecordStructurePtr const &parent,
PVRecordPtr const & pvRecord);
/**
* Destructor.
* @brief Destructor.
*/
virtual ~PVRecordField() {}
/**
* Get the parent.
* @brief Get the parent.
*
* @return The parent.
*/
PVRecordStructurePtr getParent();
/**
* Get the PVField.
* @brief Get the PVField.
*
* @return The shared pointer.
*/
epics::pvData::PVFieldPtr getPVField();
/**
* Get the full name of the field, i.e. field,field,..
* @brief Get the full name of the field, i.e. field,field,..
* @return The full name.
*/
std::string getFullFieldName();
/**
* Get the recordName plus the full name of the field, i.e. recordName.field,field,..
* @brief Get the recordName plus the full name of the field, i.e. recordName.field,field,..
* @return The name.
*/
std::string getFullName();
/**
* Returns the PVRecord to which this field belongs.
* @brief Return the PVRecord to which this field belongs.
* @return The shared pointer,
*/
PVRecordPtr getPVRecord();
/**
* This is called by the code that implements the data interface.
* @brief This is called by the code that implements the data interface.
* It is called whenever the put method is called.
*/
virtual void postPut();
@ -355,7 +386,7 @@ class epicsShareClass PVRecordStructure : public PVRecordField {
public:
POINTER_DEFINITIONS(PVRecordStructure);
/**
* Constructor.
* @brief Constructor.
* @param pvStructure The data.
* @param parent The parent
* @param pvRecord The record that has this field.
@ -365,22 +396,22 @@ public:
PVRecordStructurePtr const &parent,
PVRecordPtr const & pvRecord);
/**
* Destructor.
* @brief Destructor.
*/
virtual ~PVRecordStructure() {}
/**
* Get the sub fields.
* @brief Get the sub fields.
* @return the array of PVRecordFieldPtr.
*/
PVRecordFieldPtrArrayPtr getPVRecordFields();
/**
* Get the data structure/
* @brief Get the data structure/
* @return The shared pointer.
*/
epics::pvData::PVStructurePtr getPVStructure();
protected:
/**
* Called by implementation code of PVRecord.
* @brief Called by implementation code of PVRecord.
*/
virtual void init();
private:
@ -398,11 +429,11 @@ class epicsShareClass PVRecordClient {
public:
POINTER_DEFINITIONS(PVRecordClient);
/**
* Destructor.
* @brief Destructor.
*/
virtual ~PVRecordClient() {}
/**
* Detach from the record because it is being removed.
* @brief Detach from the record because it is being removed.
* @param pvRecord The record.
*/
virtual void detach(PVRecordPtr const & pvRecord) = 0;
@ -420,17 +451,19 @@ class epicsShareClass PVListener :
public:
POINTER_DEFINITIONS(PVListener);
/**
* Destructor.
* @brief Destructor.
*/
virtual ~PVListener() {}
/**
* pvField has been modified.
* @brief pvField has been modified.
*
* This is called if the listener has called PVRecordField::addListener for pvRecordField.
* @param pvRecordField The modified field.
*/
virtual void dataPut(PVRecordFieldPtr const & pvRecordField) = 0;
/**
* A subfield has been modified.
* @brief A subfield has been modified.
*
* @param requested The structure that was requested.
* @param pvRecordField The field that was modified.
*/
@ -438,17 +471,17 @@ public:
PVRecordStructurePtr const & requested,
PVRecordFieldPtr const & pvRecordField) = 0;
/**
* Begin a set of puts.
* @brief Begin a set of puts.
* @param pvRecord The record.
*/
virtual void beginGroupPut(PVRecordPtr const & pvRecord) = 0;
/**
* End a set of puts.
* @brief End a set of puts.
* @param pvRecord The record.
*/
virtual void endGroupPut(PVRecordPtr const & pvRecord) = 0;
/**
* Connection to record is being terminated.
* @brief Connection to record is being terminated.
* @param pvRecord The record.
*/
virtual void unlisten(PVRecordPtr const & pvRecord) = 0;
@ -463,16 +496,17 @@ class epicsShareClass PVDatabase {
public:
POINTER_DEFINITIONS(PVDatabase);
/**
* Get the master database.
* @brief Get the master database.
* @return The shared pointer.
*/
static PVDatabasePtr getMaster();
/**
* Destructor
* @brief Destructor
*/
virtual ~PVDatabase();
/**
* Destroy the PVDatabase.
* @brief Destroy the PVDatabase.
*
* For each record in the database the record is removed and it's destroy method is called.
*/
virtual void destroy();
@ -484,19 +518,20 @@ public:
*/
PVRecordPtr findRecord(std::string const& recordName);
/**
* Add a record.
* @brief Add a record.
*
* @param record The record to add.
* @return <b>true</b> if record was added.
*/
bool addRecord(PVRecordPtr const & record);
/**
* Remove a record.
* @brief Remove a record.
* @param record The record to remove.
* @return <b>true</b> if record was removed.
*/
bool removeRecord(PVRecordPtr const & record);
/**
* Get the names of all the records in the database.
* @brief Get the names of all the records in the database.
* @return The names.
*/
epics::pvData::PVStringArrayPtr getRecordNames();

10
src/pv/removeRecord.h
View File

@ -41,21 +41,13 @@ public:
*/
static RemoveRecordPtr create(
std::string const & recordName);
/**
* destructor
*/
virtual ~RemoveRecord();
/**
* Clean up any resources used.
*/
virtual void destroy();
/**
* standard init method required by PVRecord
* @return true unless record name already exists.
*/
virtual bool init();
/**
* Set the trace level.
* @brief Remove the record specified by recordName.
*/
virtual void process();
private:

13
src/pv/traceRecord.h
View File

@ -35,27 +35,20 @@ class epicsShareClass TraceRecord :
public:
POINTER_DEFINITIONS(TraceRecord);
/**
* Factory methods to create TraceRecord.
* @brief Factory method to create TraceRecord.
*
* @param recordName The name for the TraceRecord.
* @return A shared pointer to TraceRecord..
*/
static TraceRecordPtr create(
std::string const & recordName);
/**
* destructor
*/
virtual ~TraceRecord();
/**
* Clean up any resources used.
*/
virtual void destroy();
/**
* standard init method required by PVRecord
* @return true unless record name already exists.
*/
virtual bool init();
/**
* Set the trace level.
* @brief Set the trace level for record specified by recordName.
*/
virtual void process();
private:

9
src/special/removeRecord.cpp
View File

@ -47,15 +47,6 @@ RemoveRecord::RemoveRecord(
{
}
RemoveRecord::~RemoveRecord()
{
}
void RemoveRecord::destroy()
{
PVRecord::destroy();
}
bool RemoveRecord::init()
{
initPVRecord();

8
src/special/traceRecord.cpp
View File

@ -48,14 +48,6 @@ TraceRecord::TraceRecord(
{
}
TraceRecord::~TraceRecord()
{
}
void TraceRecord::destroy()
{
PVRecord::destroy();
}
bool TraceRecord::init()
{