krfb: fix termination and syncing of threads on exit. This resolves issue #2.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

libvncserver/main.cpp

@@ -466,13 +466,13 @@ void rfbMarkRectAsModified(rfbScreenInfoPtr screen,int x1,int y1,int x2,int y2)
 #include <unistd.h>
 
 static void *
-clientOutput(void *data)
+clientOutput(ClientOutputHandlerObject::Data d)
 {
-    rfbClientPtr cl = (rfbClientPtr)data;
+    rfbClientPtr cl = d.rfbData;
     rfbBool haveUpdate;
     sraRegion* updateRegion;
 
-    while (1) {
+    while (!d.requestExit) {
         haveUpdate = false;
         while (!haveUpdate) {
 		if (cl->sock == -1) {
@@ -532,18 +532,18 @@ clientOutput(void *data)
 }
 
 static void *
-clientInput(void *data)
+clientInput(OnHoldClientHandlerObject::Data d)
 {
-    rfbClientPtr cl = (rfbClientPtr)data;
+    rfbClientPtr cl = d.rfbData;
     /* Start output thread */
     TQEventLoopThread* clientOutputHandlerThread = new TQEventLoopThread();
     ClientOutputHandlerObject* clientOutputHandler = new ClientOutputHandlerObject();
-    clientOutputHandler->d = cl;
+    clientOutputHandler->d.rfbData = cl;
     clientOutputHandler->moveToThread(clientOutputHandlerThread);
     TQTimer::singleShot(0, clientOutputHandler, TQ_SLOT(run()));
     clientOutputHandlerThread->start();
 
-    while (1) {
+    while (!d.requestExit) {
 	fd_set rfds, wfds, efds;
 	struct timeval tv;
 	int n;
@@ -589,7 +589,7 @@ clientInput(void *data)
 	{
 	    /* Reset the pipe */
 	    char buf;
-	    while (read(cl->pipe_notify_client_thread[0], &buf, sizeof(buf)) == sizeof(buf));
+	    while (!d.requestExit && read(cl->pipe_notify_client_thread[0], &buf, sizeof(buf)) == sizeof(buf));
 	}
 
         if (FD_ISSET(cl->sock, &rfds) || FD_ISSET(cl->sock, &efds))
@@ -597,7 +597,7 @@ clientInput(void *data)
 #ifdef LIBVNCSERVER_WITH_WEBSOCKETS
             do {
                 rfbProcessClientMessage(cl);
-            } while (webSocketsHasDataInBuffer(cl));
+            } while (!d.requestExit && webSocketsHasDataInBuffer(cl));
 #else
             rfbProcessClientMessage(cl);
 #endif
@@ -608,6 +608,7 @@ clientInput(void *data)
     LOCK(cl->updateMutex);
     TSIGNAL(cl->updateCond);
     UNLOCK(cl->updateMutex);
+    clientOutputHandler->requestExit();
     clientOutputHandlerThread->wait();
     delete clientOutputHandlerThread;
     clientOutputHandlerThread = NULL;
@@ -620,9 +621,9 @@ clientInput(void *data)
 }
 
 static void*
-listenerRun(void *data)
+listenerRun(ControlPipeHandlerObject::Data d)
 {
-    rfbScreenInfoPtr screen=(rfbScreenInfoPtr)data;
+    rfbScreenInfoPtr screen=d.rfbData;
     int client_fd;
     struct sockaddr_storage peer;
     rfbClientPtr cl = NULL;
@@ -640,7 +641,7 @@ listenerRun(void *data)
 
     /* TODO: this thread won't die by restarting the server */
     /* TODO: HTTP is not handled */
-    while (1) {
+    while (!d.requestExit) {
         client_fd = -1;
         FD_ZERO(&listen_fds);
 	if(screen->listenSock >= 0) 
@@ -673,7 +674,7 @@ rfbStartOnHoldClient(rfbClientPtr cl)
 {
 	mOnHoldClientHandlerThread = new TQEventLoopThread();
 	mOnHoldClientHandler = new OnHoldClientHandlerObject();
-	mOnHoldClientHandler->d = cl;
+	mOnHoldClientHandler->d.rfbData = cl;
 	mOnHoldClientHandler->moveToThread(mOnHoldClientHandlerThread);
 	TQTimer::singleShot(0, mOnHoldClientHandler, TQ_SLOT(run()));
 	mOnHoldClientHandlerThread->start();
@@ -1097,17 +1098,28 @@ void rfbScreenCleanup(rfbScreenInfoPtr screen)
   }
   rfbReleaseClientIterator(i);
 
+  if (mOnHoldClientHandler) {
+    mOnHoldClientHandler->requestExit();
+  }
   if (mOnHoldClientHandlerThread) {
-    mOnHoldClientHandlerThread->exit();
+    mOnHoldClientHandlerThread->wait();
     delete mOnHoldClientHandlerThread;
     mOnHoldClientHandlerThread = NULL;
+  }
+  if (mOnHoldClientHandler) {
     delete mOnHoldClientHandler;
     mOnHoldClientHandler = NULL;
   }
+
+  if (mControlPipeHandler) {
+    mControlPipeHandler->requestExit();
+  }
   if (mControlPipeHandlerThread) {
-    mControlPipeHandlerThread->exit();
+    mControlPipeHandlerThread->wait();
     delete mControlPipeHandlerThread;
     mControlPipeHandlerThread = NULL;
+	}
+  if (mControlPipeHandler) {
     delete mControlPipeHandler;
     mControlPipeHandler = NULL;
   }
@@ -1305,7 +1317,7 @@ void rfbRunEventLoop(rfbScreenInfoPtr screen, long usec, rfbBool runInBackground
 
 	mControlPipeHandlerThread = new TQEventLoopThread();
 	mControlPipeHandler = new ControlPipeHandlerObject();
-	mControlPipeHandler->d = screen;
+	mControlPipeHandler->d.rfbData = screen;
 	mControlPipeHandler->moveToThread(mControlPipeHandlerThread);
 	TQTimer::singleShot(0, mControlPipeHandler, TQ_SLOT(run()));
 	mControlPipeHandlerThread->start();
@@ -1324,7 +1336,7 @@ void rfbRunEventLoop(rfbScreenInfoPtr screen, long usec, rfbBool runInBackground
 }
 
 ControlPipeHandlerObject::ControlPipeHandlerObject() : TQObject() {
-	//
+	d.requestExit = false;
 }
 
 ControlPipeHandlerObject::~ControlPipeHandlerObject() {
@@ -1339,7 +1351,7 @@ void ControlPipeHandlerObject::run(void) {
 }
 
 OnHoldClientHandlerObject::OnHoldClientHandlerObject() : TQObject() {
-	//
+	d.requestExit = false;
 }
 
 OnHoldClientHandlerObject::~OnHoldClientHandlerObject() {
@@ -1354,7 +1366,7 @@ void OnHoldClientHandlerObject::run(void) {
 }
 
 ClientOutputHandlerObject::ClientOutputHandlerObject() : TQObject() {
-	//
+	d.requestExit = false;
 }
 
 ClientOutputHandlerObject::~ClientOutputHandlerObject() {

libvncserver/main.h

@@ -21,9 +21,15 @@ class ControlPipeHandlerObject : public TQObject
 
 	public slots:
 		void run();
+		void requestExit() { d.requestExit = true; }
 
 	public:
-		rfbScreenInfoPtr d;
+		struct Data
+		{
+		  rfbScreenInfoPtr rfbData;
+		  bool requestExit;
+		};
+		Data d;
 };
 
 class OnHoldClientHandlerObject : public TQObject
@@ -36,9 +42,15 @@ class OnHoldClientHandlerObject : public TQObject
 
 	public slots:
 		void run();
+		void requestExit() { d.requestExit = true; }
 
 	public:
-		rfbClientPtr d;
+		struct Data
+		{
+		  rfbClientPtr rfbData;
+		  bool requestExit;
+		};
+		Data d;
 };
 
 class ClientOutputHandlerObject : public TQObject
@@ -51,9 +63,15 @@ class ClientOutputHandlerObject : public TQObject
 
 	public slots:
 		void run();
+		void requestExit() { d.requestExit = true; }
 
 	public:
-		rfbClientPtr d;
+		struct Data
+		{
+		  rfbClientPtr rfbData;
+		  bool requestExit;
+		};
+		Data d;
 };
 
 #endif // _MAIN_H