- added safe mutex wrapper class

source/shared_lib/include/platform/sdl/thread.h

@@ -51,7 +51,7 @@ private:
 //	class Mutex
 // =====================================================
 
-class Mutex{
+class Mutex {
 private:
 	SDL_mutex* mutex;
 
@@ -62,6 +62,28 @@ public:
 	void v();
 };
 
+class MutexSafeWrapper {
+protected:
+	Mutex *mutex;
+public:
+
+	MutexSafeWrapper(Mutex *mutex) {
+		this->mutex = mutex;
+		if(this->mutex != NULL) {
+			this->mutex->p();
+		}
+	}
+	~MutexSafeWrapper() {
+		ReleaseLock();
+	}
+	void ReleaseLock() {
+		if(this->mutex != NULL) {
+			this->mutex->v();
+			this->mutex = NULL;
+		}
+	}
+};
+
 // =====================================================
 //	class Semaphore
 // =====================================================