more changes to pull from epics-base

MRKCHANGES.md

@@ -1,99 +0,0 @@
-========
-Overview
-========
-
-pvaCientCPP did not terminate properly.
-It has a singleton class named **PvaClient**.
-When the singleton is created it calls:
-
-    ClientFactory::start();
-
-The destructor for **PvaClient** calls:
-
-    ClientFactory::stop();
-
-This call results in the following message:
-
-    terminate called after throwing an instance of 'epicsMutex::invalidMutex'
-       what():  epicsMutex::invalidMutex() 
-
-Further investigation found that this was caused by a mutex belonging to ChannelProviderRegistry.
-
-If fact it appeared that the only way the crash did not occur is if the client code was of the form:
-
-    int main(int argc,char *argv[])
-    {
-         ClientFactory::start();
-         ...
-         ClientFactory::stop();
-    }
-
-While investigating this problem I also realized that the existing implementation of
-ClientFactory only worked if a single call was made to start and a single call to stop.
-
-In pvAccessCPP changes were made to the followimg:
-
-1) ChannelProviderRegistry
-2) ClientFactory
-3) CAChannelProviderFactory
-
-These are discussed below.
-
-Changes were also made to pvaClientCPP.
-The change was to use the new ChannelProviderRegistry methods.
-
-All these changes are in the github repositories belonging to mrkraimer.
-
------------------------
-ChannelProviderRegistry
------------------------
-
-The following new method is added to ChannelProviderRegistry:
-
-
-    static ChannelProviderRegistry::shared_pointer getChannelProviderRegistry();
-
-**getChannelProviderRegistry** creates the single instance of **ChannelProviderRegistry**
-the first time it is called and always returns a shared pointer to the single
-instance,
-
-Any facility that calls the start/stop methods of any channelProvider factory must keep the shared pointer
-until the facility no longer requires use of the registry or any channel provider the facility uses.
-
-The above methods replace the following functions:
-
-    // THE FOLLOWING SHOULD NOT BE CALLED
-    epicsShareFunc ChannelProviderRegistry::shared_pointer getChannelProviderRegistry()      EPICS_DEPRECATED;
-    epicsShareFunc void registerChannelProviderFactory(
-         ChannelProviderFactory::shared_pointer const & channelProviderFactory) EPICS_DEPRECATED;
-    epicsShareFunc void unregisterChannelProviderFactory(
-         ChannelProviderFactory::shared_pointer const & channelProviderFactory) EPICS_DEPRECATED;
-     epicsShareFunc void unregisterAllChannelProviderFactory() EPICS_DEPRECATED;
-
-Note that the methods are all deprecated.
-They were kept so that existing code will still compile and run.
-Any code that uses these methods may see the invalidMutex exception on termination.
-
--------------
-ClientFactory
--------------
-
-This has two major changes:
-
-1) It uses the new **ChannelProviderRegistry** methods,
-
-2) It allows multiple calls to start and stop.
-
-
-------------------------
-CAChannelProviderFactory
-------------------------
-
-This has two major changes:
-
-1) It uses the new **ChannelProviderRegistry** methods,
-
-2) It allows multiple calls to start and stop.
-
-
-

src/ca/pv/caProvider.h

@@ -20,7 +20,7 @@ class Configuration;
 namespace ca {
 
 class epicsShareClass CAChannelProvider :
-    public epics::pvAccess::ChannelProvider,
+    public ChannelProvider,
     public std::tr1::enable_shared_from_this<CAChannelProvider>
 {
 public:
@@ -83,11 +83,8 @@ private:
 };
 
 
-class epicsShareClass CAClientFactory {
-private:
-    static epics::pvAccess::ChannelProviderRegistry::shared_pointer channelRegistry;
-    static epics::pvAccess::ChannelProviderFactory::shared_pointer channelProvider;
-    static int numStart;
+class epicsShareClass CAClientFactory
+{
 public:
     static void start();
     static void stop();

src/pva/pv/clientFactory.h

@@ -9,22 +9,10 @@
 
 #include <shareLib.h>
 
-#include <pv/sharedPtr.h>
-
 namespace epics {
 namespace pvAccess {
 
-class ChannelProviderRegistry;
-typedef std::tr1::shared_ptr<ChannelProviderRegistry> ChannelProviderRegistryPtr;
-
-class ChannelProviderFactory;
-typedef std::tr1::shared_ptr<ChannelProviderFactory> ChannelProviderFactoryPtr;
-
 class epicsShareClass ClientFactory {
-private:
-    static ChannelProviderRegistryPtr channelRegistry;
-    static ChannelProviderFactoryPtr channelProvider;
-    static int numStart;
 public:
     static void start();
     static void stop();