added more mutex in the server (may fix #480)

ChangeLog

@@ -15,6 +15,8 @@
 
 - support MIDI control faders in headless build (#483)
 
+- added more mutex in the server (may fix #480)
+
 - bug fix: --showallservers ping column sort is alphabetic (#201)
 
 

src/server.cpp

@@ -599,6 +599,8 @@ void CServer::SendProtMessage ( int iChID, CVector<uint8_t> vecMessage )
 void CServer::OnNewConnection ( int          iChID,
                                 CHostAddress RecHostAddr )
 {
+    QMutexLocker locker ( &Mutex );
+
     // inform the client about its own ID at the server (note that this
     // must be the first message to be sent for a new connection)
     vecChannels[iChID].CreateClientIDMes ( iChID );
@@ -669,6 +671,8 @@ void CServer::OnNewConnection ( int          iChID,
 
 void CServer::OnServerFull ( CHostAddress RecHostAddr )
 {
+    // note: no mutex required here
+
     // inform the calling client that no channel is free
     ConnLessProtocol.CreateCLServerFullMes ( RecHostAddr );
 }
@@ -681,16 +685,6 @@ void CServer::OnSendCLProtMessage ( CHostAddress     InetAddr,
     Socket.SendPacket ( vecMessage, InetAddr );
 }
 
-void CServer::OnProtcolCLMessageReceived ( int              iRecID,
-                                           CVector<uint8_t> vecbyMesBodyData,
-                                           CHostAddress     RecHostAddr )
-{
-    // connection less messages are always processed
-    ConnLessProtocol.ParseConnectionLessMessageBody ( vecbyMesBodyData,
-                                                      iRecID,
-                                                      RecHostAddr );
-}
-
 void CServer::OnCLDisconnection ( CHostAddress InetAddr )
 {
     // check if the given address is actually a client which is connected to
@@ -743,7 +737,6 @@ void CServer::OnHandledSignal ( int sigNum )
 #else
     switch ( sigNum )
     {
-
     case SIGUSR1:
         RequestNewRecording();
         break;
@@ -1442,13 +1435,25 @@ int CServer::FindChannel ( const CHostAddress& CheckAddr )
     return INVALID_CHANNEL_ID;
 }
 
+void CServer::OnProtcolCLMessageReceived ( int              iRecID,
+                                           CVector<uint8_t> vecbyMesBodyData,
+                                           CHostAddress     RecHostAddr )
+{
+    QMutexLocker locker ( &Mutex );
+
+    // connection less messages are always processed
+    ConnLessProtocol.ParseConnectionLessMessageBody ( vecbyMesBodyData,
+                                                      iRecID,
+                                                      RecHostAddr );
+}
+
 void CServer::OnProtcolMessageReceived ( int              iRecCounter,
                                          int              iRecID,
                                          CVector<uint8_t> vecbyMesBodyData,
                                          CHostAddress     RecHostAddr )
 {
-    Mutex.lock();
+    QMutexLocker locker ( &Mutex );
-    {
+
     // find the channel with the received address
     const int iCurChanID = FindChannel ( RecHostAddr );
 
@@ -1461,19 +1466,17 @@ void CServer::OnProtcolMessageReceived ( int              iRecCounter,
                                                  RecHostAddr );
     }
 }
-    Mutex.unlock();
-}
 
 bool CServer::PutAudioData ( const CVector<uint8_t>& vecbyRecBuf,
                              const int               iNumBytesRead,
                              const CHostAddress&     HostAdr,
                              int&                    iCurChanID )
 {
+    QMutexLocker locker ( &Mutex );
+
     bool bNewConnection = false; // init return value
     bool bChanOK        = true;  // init with ok, might be overwritten
 
-    Mutex.lock();
-    {
     // Get channel ID ------------------------------------------------------
     // check address
     iCurChanID = FindChannel ( HostAdr );
@@ -1523,8 +1526,6 @@ bool CServer::PutAudioData ( const CVector<uint8_t>& vecbyRecBuf,
             bNewConnection = true;
         }
     }
-    }
-    Mutex.unlock();
 
     // return the state if a new connection was happening
     return bNewConnection;

src/server.h

@@ -458,10 +458,8 @@ public slots:
     void OnCLReqVersionAndOS ( CHostAddress InetAddr )
         { ConnLessProtocol.CreateCLVersionAndOSMes ( InetAddr ); }
 
-    // the CreateChannelList() function access vecChannels which as to be mutexed
-    // since the normal server thread my change that at a random time
     void OnCLReqConnClientsList ( CHostAddress InetAddr )
-        { QMutexLocker locker ( &Mutex ); ConnLessProtocol.CreateCLConnClientsListMes ( InetAddr, CreateChannelList() ); }
+        { ConnLessProtocol.CreateCLConnClientsListMes ( InetAddr, CreateChannelList() ); }
 
     void OnCLRegisterServerReceived ( CHostAddress    InetAddr,
                                       CHostAddress    LInetAddr,