Get rid of locks added InterlockedExchangeAdd function in thread.cpp

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@748 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/Common/Src/Thread.cpp

@@ -344,6 +344,17 @@ void Event::Wait()
 	is_set_ = false;
 	pthread_mutex_unlock(&mutex_);
 }
+
+int InterlockedExchangeAdd( int* Addend, int Increment )
+{
+
+#if defined(__GNUC__) && defined (__GNUC_MINOR__) && ((4 < __GNUC__) || (4 == __GNUC__ && 1 <= __GNUC_MINOR__))
+  return  __sync_add_and_fetch(Addend, Increment);
+#else
+  // TODO support old gcc
+#endif
+}
+
 #endif
 
 

Source/Core/Common/Src/Thread.h

@@ -113,6 +113,9 @@ class Event
 void SleepCurrentThread(int ms);
 
 void SetCurrentThreadName(const char* name);
+
+int InterlockedExchangeAdd( int* Addend, int Increment );
 } // end of namespace Common
 
+
 #endif

Source/Core/Core/Src/HW/CommandProcessor.cpp

@@ -378,10 +378,8 @@ void GatherPipeBursted()
 			Common::SleepCurrentThread(1);
 #ifdef _WIN32
 		InterlockedExchangeAdd((LONG*)&fifo.CPReadWriteDistance, GPFifo::GATHER_PIPE_SIZE);
-#else
-                fifo.sync->Enter();
-                fifo.CPReadWriteDistance +=  GPFifo::GATHER_PIPE_SIZE;
-                fifo.sync->Leave();
+#else 
+                Common::InterlockedExchangeAdd((int*)&fifo.CPReadWriteDistance, GPFifo::GATHER_PIPE_SIZE);
 #endif
 
 		// check if we are in sync

Source/Core/VideoCommon/Src/Fifo.cpp

@@ -217,12 +217,13 @@ void Fifo_EnterLoop(const SVideoInitialize &video_initialize)
 #endif
                 _fifo.CPReadPointer += 32;
                 Video_SendFifoData(uData);
+
 #ifdef _WIN32
                 InterlockedExchangeAdd((LONG*)&_fifo.CPReadWriteDistance, -32);
                 LeaveCriticalSection(&_fifo.sync);
 #else 
-                  _fifo.CPReadWriteDistance -= 32;
-                  _fifo.sync->Leave();
+                Common::InterlockedExchangeAdd((int*)&_fifo.CPReadWriteDistance, -32);
+                _fifo.sync->Leave();
 #endif
                 // increase the ReadPtr
                 if (_fifo.CPReadPointer >= _fifo.CPEnd)