No more SleepCurrentThreads in Command Processor. Some Fifo cleanup.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3822 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/AudioCommon/Src/Mixer.cpp

@@ -108,7 +108,7 @@ void CMixer::PushSamples(short *samples, int num_stereo_samples, int core_sample
 				return;
 		}
 		soundStream->Update();
-		Common::SleepCurrentThread(0);
+		Common::YieldCPU();
 	}
 	// -----------------------------------------------------------------------
 

Source/Core/Common/Src/Thread.h

@@ -174,6 +174,19 @@ private:
 void InitThreading();
 void SleepCurrentThread(int ms);
 
+// YieldCPU: Use this function during a spin-wait to make the current thread
+// relax while another thread is working.
+// If you find yourself calling this function, please consider using an event-
+// based design instead.
+inline void YieldCPU()
+{
+#ifdef _WIN32
+	YieldProcessor();
+#else
+	// TODO: Implement for other platforms.
+#endif
+}
+
 void SetCurrentThreadName(const char *name);
 
 } // namespace Common

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

@@ -152,13 +152,6 @@ u16 m_tokenReg;
 
 SCPFifoStruct fifo; //This one is shared between gfx thread and emulator thread
 static u32 fake_GPWatchdogLastToken = 0;
-static bool fake_CommandProcessorNotUsed = true; // This is used by VI when homebrews use directly XFB without FIFO and CP
-
-// hack: This is used by VI when homebrews use directly XFB without FIFO and CP
-bool IsCommandProcessorNotUsed()
-{
-	return fake_CommandProcessorNotUsed;
-}
 
 void DoState(PointerWrap &p)
 {
@@ -198,7 +191,7 @@ void IncrementGPWDToken()
 void WaitForFrameFinish()
 {
 	while ((fake_GPWatchdogLastToken == fifo.Fake_GPWDToken) && fifo.bFF_GPReadEnable && (fifo.CPReadWriteDistance > 0) && !(fifo.bFF_BPEnable && fifo.bFF_Breakpoint))
-		Common::SleepCurrentThread(1);
+		Common::YieldCPU();
 	fake_GPWatchdogLastToken = fifo.Fake_GPWDToken;
 }
 
@@ -229,7 +222,6 @@ void Init()
 	fifo.CPReadIdle = 1;
 
 	et_UpdateInterrupts = CoreTiming::RegisterEvent("UpdateInterrupts", UpdateInterrupts_Wrapper);
-	fake_CommandProcessorNotUsed = true;
 }
 
 void Shutdown()
@@ -384,12 +376,10 @@ void Write16(const u16 _Value, const u32 _Address)
 				" - We aren't betting on that :)", fifo.CPReadWriteDistance);
                         */
 			DEBUG_LOG(COMMANDPROCESSOR, "*********************** GXSetGPFifo very soon? ***********************");
-			u32 ct=0;
 			// (mb2) We don't sleep here since it could be a perf issue for super monkey ball (yup only this game IIRC)
 			// Touching that game is a no-go so I don't want to take the risk :p
 			while (fifo.bFF_GPReadEnable && fifo.CPReadWriteDistance > 0 )
-				ct++;
-			if (ct) {INFO_LOG(COMMANDPROCESSOR, "(Write16): %lu cycles for nothing :[ ", ct);}
+				Common::YieldCPU();
 		}
 	}
 
@@ -424,7 +414,6 @@ void Write16(const u16 _Value, const u32 _Address)
 
 	case CTRL_REGISTER:
 		{
-			fake_CommandProcessorNotUsed = false;
 			UCPCtrlReg tmpCtrl(_Value);
 
 			Common::AtomicStore(fifo.bFF_GPReadEnable,	tmpCtrl.GPReadEnable);
@@ -604,7 +593,6 @@ void STACKALIGN GatherPipeBursted()
         Common::AtomicAdd(fifo.CPReadWriteDistance, GPFifo::GATHER_PIPE_SIZE);
 
 		// High watermark overflow handling (hacked way)
-		u32 ct = 0;
 		if (fifo.CPReadWriteDistance > fifo.CPHiWatermark)
 		{
 			// we should raise an Ov interrupt for an accurate fifo emulation and let PPC deal with it.
@@ -626,15 +614,7 @@ void STACKALIGN GatherPipeBursted()
 			INFO_LOG(COMMANDPROCESSOR, "(GatherPipeBursted): CPHiWatermark reached");
 			// Wait for GPU to catch up
 			while (!(fifo.bFF_BPEnable && fifo.bFF_Breakpoint) && fifo.CPReadWriteDistance > fifo.CPLoWatermark)
-			{
-				ct++;
-				Common::SleepCurrentThread(1);
-			}
-			if (ct) {
-				// This is actually kind of fine. See big comment above.
-				DEBUG_LOG(COMMANDPROCESSOR, "(GatherPipeBursted): waited %lu ms. ", ct);
-			}
-			/**/
+				Common::YieldCPU();
 		}
 		// check if we are in sync
 		_assert_msg_(COMMANDPROCESSOR, fifo.CPWritePointer	== CPeripheralInterface::Fifo_CPUWritePointer, "FIFOs linked but out of sync");

Source/Core/Core/Src/HW/CommandProcessor.h

@@ -88,9 +88,6 @@ bool AllowIdleSkipping();
 void IncrementGPWDToken();
 void WaitForFrameFinish();
 
-// hack: This is used by VI when homebrews use directly XFB without FIFO and CP
-bool IsCommandProcessorNotUsed();
-
 } // end of namespace CommandProcessor
 
 #endif

Source/Core/VideoCommon/Src/Fifo.cpp

@@ -97,8 +97,7 @@ void Fifo_ExitLoopNonBlocking() {
 }
 
 // Description: Fifo_EnterLoop() sends data through this function.
-// TODO: Possibly inline it? This one is exported so it will likely not be inlined at all.
-void Video_SendFifoData(u8* _uData, u32 len)
+void Fifo_SendFifoData(u8* _uData, u32 len)
 {
     if (size + len >= FIFO_SIZE)
     {
@@ -127,12 +126,11 @@ void Fifo_EnterLoop(const SVideoInitialize &video_initialize)
 
     while (fifoStateRun)
     {
-#if defined(_WIN32)
 		video_initialize.pPeekMessages();
-#endif
+
+		VideoFifo_CheckEFBAccess();
 
 		VideoFifo_CheckSwapRequest();
-		VideoFifo_CheckEFBAccess();
 
 		s_criticalFifo.Enter();
 
@@ -140,18 +138,12 @@ void Fifo_EnterLoop(const SVideoInitialize &video_initialize)
         if ((_fifo.bFF_GPReadEnable) && _fifo.CPReadWriteDistance && !(_fifo.bFF_BPEnable && _fifo.bFF_Breakpoint))
         {
 			Common::AtomicStore(_fifo.CPReadIdle, 0);
-			//video_initialize.pLog("RUN...........................",FALSE);
-			int peek_counter = 0;
+
             while (_fifo.bFF_GPReadEnable && _fifo.CPReadWriteDistance)
 			{
 				if(!fifoStateRun)
 					break;
 
-				peek_counter++;
-				if (peek_counter == 1000) {
-					video_initialize.pPeekMessages();
-					peek_counter = 0;
-				}
                 // Create pointer to video data and send it to the VideoPlugin
 				u32 readPtr = _fifo.CPReadPointer;
                 u8 *uData = video_initialize.pGetMemoryPointer(readPtr);
@@ -162,9 +154,7 @@ void Fifo_EnterLoop(const SVideoInitialize &video_initialize)
                 {
 					if (readPtr == _fifo.CPBreakpoint)
                     {
-						video_initialize.pLog("!!! BP irq raised",FALSE);
 						Common::AtomicStore(_fifo.bFF_Breakpoint, 1);
-
                         video_initialize.pUpdateInterrupts();
                         break;
                     }
@@ -175,15 +165,6 @@ void Fifo_EnterLoop(const SVideoInitialize &video_initialize)
                 }
 				else
 				{
-#if 0 // ugly random GP slowdown for testing DC robustness... TODO: remove when completly sure DC is ok
-					int r = rand();
-					if ((r & 0xF) == r)
-						Common::SleepCurrentThread(r);
-					distToSend = 32;
-					readPtr += 32;
-					if (readPtr >= _fifo.CPEnd) 
-						readPtr = _fifo.CPBase;
-#else
 					distToSend = _fifo.CPReadWriteDistance;
 					// send 1024B chunk max length to have better control over PeekMessages' period
 					distToSend = distToSend > 1024 ? 1024 : distToSend;
@@ -193,17 +174,29 @@ void Fifo_EnterLoop(const SVideoInitialize &video_initialize)
 						readPtr = _fifo.CPBase;
 					}
 					else
-						readPtr += distToSend; 
-#endif
+						readPtr += distToSend;
 				}
+
 				// Execute new instructions found in uData
-				Video_SendFifoData(uData, distToSend);
+				Fifo_SendFifoData(uData, distToSend);
+
                 Common::AtomicStore(_fifo.CPReadPointer, readPtr);
                 Common::AtomicAdd(_fifo.CPReadWriteDistance, -distToSend);
+
+				video_initialize.pPeekMessages();
+
+				VideoFifo_CheckEFBAccess();
+
+				VideoFifo_CheckSwapRequest();
 			}
-			//video_initialize.pLog("..........................IDLE",FALSE);
+
 			Common::AtomicStore(_fifo.CPReadIdle, 1);
         }
+		else
+		{
+			Common::YieldCPU();
+		}
+
 		s_criticalFifo.Leave();
     }
 	fifo_exit_event.Set();

Source/Core/VideoCommon/Src/Fifo.h

@@ -28,7 +28,7 @@
 void Fifo_Init();
 void Fifo_Shutdown();
 
-/* void Video_SendFifoData(); */  // defined in plugin spec - implemented in Fifo.cpp
+void Fifo_SendFifoData(u8* _uData, u32 len);
 
 // These two are for dual core mode only.
 void Fifo_EnterLoop(const SVideoInitialize &video_initialize);

Source/Plugins/Plugin_VideoDX9/Src/main.cpp

@@ -256,6 +256,11 @@ void Shutdown(void)
 	DeInit();
 }
 
+void Video_SendFifoData(u8* _uData, u32 len)
+{
+	Fifo_SendFifoData(_uData, len);
+}
+
 void VideoFifo_CheckSwapRequest()
 {
 }

Source/Plugins/Plugin_VideoOGL/Src/main.cpp

@@ -416,6 +416,10 @@ void Shutdown(void)
 }
 
 
+void Video_SendFifoData(u8* _uData, u32 len)
+{
+	Fifo_SendFifoData(_uData, len);
+}
 
 // Enter and exit the video loop
 void Video_EnterLoop()