on-line delete; notify clients when a PVRecord is deleted

src/database/pvRecord.cpp

@@ -48,7 +48,7 @@ PVRecord::PVRecord(
 
 PVRecord::~PVRecord()
 {
-    if(traceLevel>1) {
+    if(traceLevel>0) {
         cout << "~PVRecord() " << recordName << endl;
     }
     destroy();
@@ -66,44 +66,44 @@ void PVRecord::initPVRecord()
 
 void PVRecord::destroy()
 {
-    if(traceLevel>1) {
+    if(traceLevel>0) {
         cout << "PVRecord::destroy() " << recordName << endl;
     }
-    epicsGuard<epics::pvData::Mutex> guard(mutex);
-    if(isDestroyed) {
-        return;
-    }
-    isDestroyed = true;
-    pvTimeStamp.detach();
-
-    for(std::list<PVRecordClientWPtr>::iterator iter = pvRecordClientList.begin();
-         iter!=pvRecordClientList.end();
-         iter++ )
     {
-         PVRecordClientPtr client = iter->lock();
+        epicsGuard<epics::pvData::Mutex> guard(mutex);
-         if(client) {
+        if(isDestroyed) {
-            if(traceLevel>1) {
+            return;
-                 cout << "PVRecord::destroy() calling client->detach " << recordName << endl;
-            }
-            epicsGuardRelease<epics::pvData::Mutex> unguard(guard);
-            client->detach(shared_from_this());
         }
+        isDestroyed = true;
     }
+    PVDatabasePtr pvDatabase(PVDatabase::getMaster());
+    if(pvDatabase) pvDatabase->removeRecord(shared_from_this());
+    pvTimeStamp.detach();
     for(std::list<PVListenerWPtr>::iterator iter = pvListenerList.begin();
          iter!=pvListenerList.end();
          iter++ )
     {
-         PVListenerPtr listener = iter->lock();
+        PVListenerPtr listener = iter->lock();
-         if(listener) {
+        if(!listener) continue;
-             if(traceLevel>1) {
+        if(traceLevel>0) {
-                 cout << "PVRecord::destroy() calling listener->unlisten " << recordName << endl;
+            cout << "PVRecord::destroy() calling listener->unlisten " << recordName << endl;
-            }
-            epicsGuardRelease<epics::pvData::Mutex> unguard(guard);
-            listener->unlisten(shared_from_this());
         }
+        listener->unlisten(shared_from_this());
     }
-    PVDatabasePtr pvDatabase(PVDatabase::getMaster());
+    pvListenerList.clear();
-    if(pvDatabase) pvDatabase->removeRecord(shared_from_this());
+    std::list<PVRecordClientPtr>::iterator iter;
+    for (iter = pvRecordClientList.begin();
+         iter!=pvRecordClientList.end();
+         iter++ )
+    {
+        PVRecordClientPtr client = *iter;
+        if(!client) continue;
+        if(traceLevel>0) {
+            cout << "PVRecord::destroy() calling client->detach " << recordName << endl;
+        }
+        client->detach(shared_from_this());
+    }
+    pvRecordClientList.clear();
 }
 
 void PVRecord::process()
@@ -198,17 +198,19 @@ bool PVRecord::addPVRecordClient(PVRecordClientPtr const & pvRecordClient)
     if(isDestroyed) {
         return false;
     }
-    std::list<PVRecordClientWPtr>::iterator iter;
+    std::list<PVRecordClientPtr>::iterator iter;
     for (iter = pvRecordClientList.begin();
          iter!=pvRecordClientList.end();
          iter++ )
     {
-        PVRecordClientPtr client = iter->lock();
+        PVRecordClientPtr client = *iter;
-        if(!client.get()) continue;
+        if(client==pvRecordClient) {
-        if(client.get()==pvRecordClient.get()) {
             return false;
         }
     }
+    if(traceLevel>1) {
+        cout << "PVRecord::addPVRecordClient() calling pvRecordClientList.push_back(pvRecordClient)" << recordName << endl;
+    }
     pvRecordClientList.push_back(pvRecordClient);
     return true;
 }
@@ -222,14 +224,14 @@ bool PVRecord::removePVRecordClient(PVRecordClientPtr const & pvRecordClient)
     if(isDestroyed) {
         return false;
     }
-    std::list<PVRecordClientWPtr>::iterator iter;
+    std::list<PVRecordClientPtr>::iterator iter;
     for (iter = pvRecordClientList.begin();
          iter!=pvRecordClientList.end();
          iter++ )
     {
-        PVRecordClientPtr client = iter->lock();
+        PVRecordClientPtr client = *iter;
-        if(!client.get()) continue;
+        if(!client) continue;
-        if(client.get()==pvRecordClient.get()) {
+        if(client==pvRecordClient) {
             pvRecordClientList.erase(iter);
             return true;
         }
@@ -237,31 +239,6 @@ bool PVRecord::removePVRecordClient(PVRecordClientPtr const & pvRecordClient)
     return false;
 }
 
-void PVRecord::detachClients()
-{
-    if(traceLevel>1) {
-        cout << "PVRecord::detachClients() " << recordName << endl;
-    }
-    epicsGuard<epics::pvData::Mutex> guard(mutex);
-    if(isDestroyed) {
-        return;
-    }
-    std::list<PVRecordClientWPtr>::iterator iter;
-    for (iter = pvRecordClientList.begin();
-         iter!=pvRecordClientList.end();
-         iter++ )
-    {
-        PVRecordClientPtr client = iter->lock();
-        if(!client) continue;
-        epicsGuardRelease <epics::pvData::Mutex> unguard(guard);
-        if(traceLevel>1) {
-            cout << "PVRecord::detachClients() calling client->detach " << recordName << endl;
-        }
-        client->detach(shared_from_this());
-    }
-    pvRecordClientList.clear();
-}
-
 bool PVRecord::addListener(
     PVListenerPtr const & pvListener,
     PVCopyPtr const & pvCopy)

src/pv/channelProviderLocal.h

@@ -393,7 +393,7 @@ protected:
         return shared_from_this();
     }
 private:
-    epics::pvAccess::ChannelRequester::weak_pointer requester;
+    epics::pvAccess::ChannelRequester::shared_pointer requester;
     ChannelProviderLocalPtr provider;
     PVRecordPtr pvRecord;
     bool beingDestroyed;

src/pv/pvDatabase.h

@@ -51,7 +51,6 @@ typedef std::tr1::weak_ptr<PVRecordStructure> PVRecordStructureWPtr;
 
 class PVRecordClient;
 typedef std::tr1::shared_ptr<PVRecordClient> PVRecordClientPtr;
-typedef std::tr1::weak_ptr<PVRecordClient> PVRecordClientWPtr;
 
 class PVListener;
 typedef std::tr1::shared_ptr<PVListener> PVListenerPtr;
@@ -167,10 +166,6 @@ public:
      * @return <b>true</b> if the client is removed.
      */
     bool removePVRecordClient(PVRecordClientPtr const & pvRecordClient);
-    /**
-     * remove all attached clients.
-     */
-    void detachClients();
     /**
      * Add a PVListener.
      * This must be called before calling pvRecordField.addListener.
@@ -258,7 +253,7 @@ private:
     epics::pvData::PVStructurePtr pvStructure;
     PVRecordStructurePtr pvRecordStructure;
     std::list<PVListenerWPtr> pvListenerList;
-    std::list<PVRecordClientWPtr> pvRecordClientList;
+    std::list<PVRecordClientPtr> pvRecordClientList;
     epics::pvData::Mutex mutex;
     std::size_t depthGroupPut;
     int traceLevel;

src/pvAccess/channelLocal.cpp

@@ -1329,7 +1329,6 @@ ChannelLocal::~ChannelLocal()
 
 void ChannelLocal::destroy()
 {
-    ChannelRequester::shared_pointer requester(this->requester.lock());
     if(pvRecord->getTraceLevel()>0) {
          cout << "ChannelLocal::destroy()"
               << " recordName " << pvRecord->getRecordName()
@@ -1349,47 +1348,45 @@ void ChannelLocal::destroy()
 void ChannelLocal::detach(PVRecordPtr const & pvRecord)
 {
     if(pvRecord->getTraceLevel()>0) {
-         ChannelRequester::shared_pointer requester(this->requester.lock());
          cout << "ChannelLocal::detach() "
          << " recordName " << pvRecord->getRecordName()
          << " requester exists " << (requester ? "true" : "false")
          << endl;
     }
-    destroy();
+    if(!requester) return;
+    requester->channelStateChange(shared_from_this(),Channel::DESTROYED);
 }
 
 
 string ChannelLocal::getRequesterName()
 {
-    ChannelRequester::shared_pointer req = requester.lock();
     if(pvRecord->getTraceLevel()>1) {
          cout << "ChannelLocal::getRequesterName() "
          << " recordName " << pvRecord->getRecordName()
-         << " requester exists " << (req ? "true" : "false")
+         << " requester exists " << (requester ? "true" : "false")
          << endl;
     }
     
-    if(!req) return string();
+    if(!requester) return string();
-    return req->getRequesterName();
+    return requester->getRequesterName();
 }
 
 void ChannelLocal::message(
         string const &message,
         MessageType messageType)
 {
-    ChannelRequester::shared_pointer req = requester.lock();
     if(pvRecord->getTraceLevel()>1) {
          cout << "ChannelLocal::message() "
          << " recordName " << pvRecord->getRecordName()
-         << " requester exists " << (req ? "true" : "false")
+         << " requester exists " << (requester ? "true" : "false")
          << endl;
     }
     {
         Lock xx(mutex);
         if(beingDestroyed) return;
     }
-    if(req) {
+    if(requester) {
-        req->message(message,messageType);
+        requester->message(message,messageType);
         return;
     }
     cout << pvRecord->getRecordName()
@@ -1417,7 +1414,7 @@ string ChannelLocal::getChannelName()
 
 ChannelRequester::shared_pointer ChannelLocal::getChannelRequester()
 {
-    return requester.lock();
+    return requester;
 }
 
 bool ChannelLocal::isConnected()
@@ -1458,7 +1455,6 @@ ChannelProcess::shared_pointer ChannelLocal::createChannelProcess(
         PVStructure::shared_pointer const & pvRequest)
 {
     if(pvRecord->getTraceLevel()>0) {
-         ChannelRequester::shared_pointer requester(this->requester.lock());
          cout << "ChannelLocal::createChannelProcess() "
          << " recordName " << pvRecord->getRecordName()
          << " requester exists " << (requester ? "true" : "false")
@@ -1478,7 +1474,6 @@ ChannelGet::shared_pointer ChannelLocal::createChannelGet(
         PVStructure::shared_pointer const &pvRequest)
 {
     if(pvRecord->getTraceLevel()>0) {
-         ChannelRequester::shared_pointer requester(this->requester.lock());
          cout << "ChannelLocal::createChannelGet() "
          << " recordName " << pvRecord->getRecordName()
          << " requester exists " << (requester ? "true" : "false")
@@ -1498,7 +1493,6 @@ ChannelPut::shared_pointer ChannelLocal::createChannelPut(
         PVStructure::shared_pointer const &pvRequest)
 {
     if(pvRecord->getTraceLevel()>0) {
-         ChannelRequester::shared_pointer requester(this->requester.lock());
          cout << "ChannelLocal::createChannelPut() "
          << " recordName " << pvRecord->getRecordName()
          << " requester exists " << (requester ? "true" : "false")
@@ -1519,7 +1513,6 @@ ChannelPutGet::shared_pointer ChannelLocal::createChannelPutGet(
         PVStructure::shared_pointer const &pvRequest)
 {
     if(pvRecord->getTraceLevel()>0) {
-         ChannelRequester::shared_pointer requester(this->requester.lock());
          cout << "ChannelLocal::createChannelPutGet() "
          << " recordName " << pvRecord->getRecordName()
          << " requester exists " << (requester ? "true" : "false")
@@ -1540,7 +1533,6 @@ ChannelRPC::shared_pointer ChannelLocal::createChannelRPC(
         PVStructure::shared_pointer const & pvRequest)
 {
     if(pvRecord->getTraceLevel()>0) {
-         ChannelRequester::shared_pointer requester(this->requester.lock());
          cout << "ChannelLocal::createChannelRPC() "
          << " recordName " << pvRecord->getRecordName()
          << " requester exists " << (requester ? "true" : "false")
@@ -1561,7 +1553,6 @@ Monitor::shared_pointer ChannelLocal::createMonitor(
         PVStructure::shared_pointer const &pvRequest)
 {
     if(pvRecord->getTraceLevel()>0) {
-         ChannelRequester::shared_pointer requester(this->requester.lock());
          cout << "ChannelLocal::createMonitor() "
          << " recordName " << pvRecord->getRecordName()
          << " requester exists " << (requester ? "true" : "false")
@@ -1581,7 +1572,6 @@ ChannelArray::shared_pointer ChannelLocal::createChannelArray(
         PVStructure::shared_pointer const &pvRequest)
 {
     if(pvRecord->getTraceLevel()>0) {
-         ChannelRequester::shared_pointer requester(this->requester.lock());
          cout << "ChannelLocal::createChannelArray() "
          << " recordName " << pvRecord->getRecordName()
          << " requester exists " << (requester ? "true" : "false")

src/pvAccess/monitorFactory.cpp

@@ -313,6 +313,14 @@ void MonitorLocal::unlisten(PVRecordPtr const & pvRecord)
     {
         cout << "PVCopyMonitor::unlisten\n";
     }
+    MonitorRequesterPtr requester = monitorRequester.lock();
+    if(requester) {
+        if(pvRecord->getTraceLevel()>1)
+        {
+            cout << "PVCopyMonitor::unlisten calling requester->unlisten\n";
+        }
+        requester->unlisten(getPtrSelf());
+    }
     pvRecord->removeListener(getPtrSelf(),pvCopy);
 }