added a special thread for making thumbnails (thumb.h thumb.cpp)

git-svn-id: svn://ttmath.org/publicrep/winix/trunk@700 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/basethread.cpp

@@ -17,6 +17,7 @@ BaseThread::BaseThread() : thread_signal(PTHREAD_COND_INITIALIZER)
 	synchro         = 0;
 	thread_id       = 0;
 	work_mode       = 0;
+	wake_up_was_called = false;
 }
 
 
@@ -91,6 +92,8 @@ bool BaseThread::BaseSignalReceived()
 {
 bool make_do = false;
 
+	wake_up_was_called = false;
+
 	try
 	{
 		make_do = SignalReceived(); // your short-time virtual method (objects are locked)
@@ -119,13 +122,18 @@ void BaseThread::BaseDo()
 // use it with Lock and Unlock
 bool BaseThread::WaitForSignal()
 {
+	if( synchro->was_stop_signal || wake_up_was_called )
+		return true;
+
 	return pthread_cond_wait(&thread_signal, &synchro->mutex) == 0;
 }
 
 
+
+// you should use this method with: synchro->Lock() and Unlock()
 void BaseThread::WakeUpThread()
 {
-	// you should use it with: synchro->Lock() and Unlock()
+	wake_up_was_called = true;
 	pthread_cond_signal(&thread_signal);
 }
 
@@ -168,14 +176,14 @@ bool make_do;
 		{
 			make_do = false;
 
-			if( !synchro->was_stop_signal && WaitForSignal() )	// automatically unlock, wait and lock again when signal comes
+			if( WaitForSignal() )					// automatically unlock, wait and lock again when signal comes
 				if( !synchro->was_stop_signal )
-					make_do = BaseSignalReceived();				// your short-time virtual method will be called (objects locked)
+					make_do = BaseSignalReceived();	// your short-time virtual method will be called (objects locked)
 	
-			Unlock();											// unlocking from WaitForSignal()
+			Unlock();								// unlocking from WaitForSignal()
 
 			if( make_do )
-				BaseDo();										// your long-time virtual method will be called (objects *not* locked)
+				BaseDo();							// your long-time virtual method will be called (objects *not* locked)
 		}
 	}
 	while( !IsExitSignal() );