Move the code generation mutex to Reactor.

src/Reactor/Nucleus.cpp

@@ -66,6 +66,7 @@ namespace sw
 	LLVMContext *Nucleus::context = 0;
 	Module *Nucleus::module = 0;
 	llvm::Function *Nucleus::function = 0;
+	BackoffLock Nucleus::codegenMutex;
 
 	class Builder : public IRBuilder<>
 	{
@@ -73,6 +74,8 @@ namespace sw
 
 	Nucleus::Nucleus()
 	{
+		codegenMutex.lock();   // Reactor and LLVM are currently not thread safe
+
 		InitializeNativeTarget();
 		JITEmitDebugInfo = false;
 
@@ -129,6 +132,8 @@ namespace sw
 		routineManager = 0;
 		function = 0;
 		module = 0;
+
+		codegenMutex.unlock();
 	}
 
 	Routine *Nucleus::acquireRoutine(const wchar_t *name, bool runOptimizations)

src/Reactor/Nucleus.hpp

@@ -13,6 +13,7 @@
 #define sw_Nucleus_hpp
 
 #include "Common/Types.hpp"
+#include "Common/MutexLock.hpp"
 
 #include <stdarg.h>
 #include <vector>
@@ -218,6 +219,8 @@ namespace sw
 		static llvm::LLVMContext *context;
 		static llvm::Module *module;
 		static RoutineManager *routineManager;
+
+		static BackoffLock codegenMutex;
 	};
 
 	class Byte;

src/Renderer/Renderer.cpp

@@ -69,8 +69,6 @@ namespace sw
 	TranscendentalPrecision rsqPrecision = ACCURATE;
 	bool perspectiveCorrection = true;
 
-	BackoffLock Renderer::codegenMutex;
-
 	struct Parameters
 	{
 		Renderer *renderer;
@@ -232,13 +230,9 @@ namespace sw
 				setupState = SetupProcessor::update();
 				pixelState = PixelProcessor::update();
 
-				codegenMutex.lock();
-
 				vertexRoutine = VertexProcessor::routine(vertexState);
 				setupRoutine = SetupProcessor::routine(setupState);
 				pixelRoutine = PixelProcessor::routine(pixelState);
-
-				codegenMutex.unlock();
 			}
 
 			int batch = batchSize / ms;

src/Renderer/Renderer.hpp

@@ -404,7 +404,6 @@ namespace sw
 		unsigned int qSize;
 
 		BackoffLock schedulerMutex;
-		static BackoffLock codegenMutex;
 
 		#if PERF_HUD
 			int64_t vertexTime[16];