Implemented b3OpenCLUtils::setCachePath

Also made kernel caching work on Mac OSX (and likely Linux, needs testing before enabling)

Demos3/GpuDemos/main_opengl3core.cpp

@@ -409,6 +409,8 @@ void myprintf(const char* msg)
 
 int main(int argc, char* argv[])
 {
+	b3OpenCLUtils::setCachePath("/Users/erwincoumans/develop/mycache");
+	
 	b3SetCustomPrintfFunc(myprintf);
 	b3Vector3 test(1,2,3);
 	test.x = 1;

src/Bullet3OpenCL/Initialize/b3OpenCLUtils.cpp

@@ -13,8 +13,9 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-//original author: Roman Ponomarev
+//Original author: Roman Ponomarev
-//cleanup by Erwin Coumans
+//Mostly Reimplemented by Erwin Coumans
+
 
 bool gDebugForceLoadingFromSource = false;
 bool gDebugSkipLoadingBinary = false;
@@ -40,6 +41,12 @@ bool gDebugSkipLoadingBinary = false;
 
 #include <assert.h>
 #define b3Assert assert
+#ifdef __APPLE__
+#include <sys/stat.h>
+
+#endif
+
+static const char* sCachedBinaryPath="cache";
 
 
 //Set the preferred platform vendor using the OpenCL SDK
@@ -150,6 +157,11 @@ const char* b3OpenCLUtils_getSdkVendorName()
 	return spPlatformVendor;
 }
 
+void b3OpenCLUtils_setCachePath(const char* path)
+{
+	sCachedBinaryPath = path;
+}
+
 cl_platform_id b3OpenCLUtils_getPlatform(int platformIndex0, cl_int* pErrNum)
 {
 #ifdef B3_USE_CLEW
@@ -590,41 +602,41 @@ cl_program b3OpenCLUtils_compileCLProgramFromString(cl_context clContext, cl_dev
 	cl_program m_cpProgram=0;
 	cl_int status;
 
-#ifdef _WIN32
 	char binaryFileName[B3_MAX_STRING_LENGTH];
-	char* bla=0;
-
-	if (clFileNameForCaching && !(disableBinaryCaching || gDebugSkipLoadingBinary||gDebugForceLoadingFromSource) )
-	{
 
 	char deviceName[256];
 	char driverVersion[256];
 	const char* strippedName;
 	int fileUpToDate = 0;
 	int binaryFileValid=0;
-		FILETIME modtimeBinary;
 	
+	if (clFileNameForCaching)
+	{
 		clGetDeviceInfo(device, CL_DEVICE_NAME, 256, &deviceName, NULL);
 		clGetDeviceInfo(device, CL_DRIVER_VERSION, 256, &driverVersion, NULL);
 	
-
 		strippedName = strip2(clFileNameForCaching,"\\");
 		strippedName = strip2(strippedName,"/");
 	
+#ifdef _WIN32
+		sprintf_s(binaryFileName,B3_MAX_STRING_LENGTH,"%s/%s.%s.%s.bin",sCachedBinaryPath,strippedName, deviceName,driverVersion );
+#else
+		sprintf(binaryFileName,"%s/%s.%s.%s.bin",sCachedBinaryPath,strippedName, deviceName,driverVersion );
+#endif
+	}
+	if (clFileNameForCaching && !(disableBinaryCaching || gDebugSkipLoadingBinary||gDebugForceLoadingFromSource) )
+	{
 		
 #ifdef _WIN32
-		sprintf_s(binaryFileName,B3_MAX_STRING_LENGTH,"cache/%s.%s.%s.bin",strippedName, deviceName,driverVersion );
+	char* bla=0;
-#else
+
-		sprintf(binaryFileName,"cache/%s.%s.%s.bin",strippedName, deviceName,driverVersion );
-#endif
 	
 
 		//printf("searching for %s\n", binaryFileName);
 
 
-
+		FILETIME modtimeBinary;
-
+		CreateDirectory(sCachedBinaryPath,0);
-		CreateDirectory("cache",0);
 		{
 
 			HANDLE binaryFileHandle = CreateFile(binaryFileName,GENERIC_READ,0,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
@@ -735,6 +747,23 @@ cl_program b3OpenCLUtils_compileCLProgramFromString(cl_context clContext, cl_dev
 
 		}
 
+	
+
+#else
+	fileUpToDate = true;
+#ifdef __APPLE__
+	if (mkdir(sCachedBinaryPath,0777) == -1)
+	{
+	}
+	else
+	{
+		b3Printf("Succesfully created cache directory: %s\n", sCachedBinaryPath);
+	}
+#endif
+#endif //_WIN32
+	}
+	
+	
 	if( fileUpToDate)
 	{
 #ifdef _WIN32
@@ -774,13 +803,28 @@ cl_program b3OpenCLUtils_compileCLProgramFromString(cl_context clContext, cl_dev
 				free (build_log);
 				b3Assert(0);
 				m_cpProgram = 0;
+
+				b3Warning("clBuildProgram reported failure on cached binary: %s\n",binaryFileName);
+
+			} else
+			{
+				b3Printf("clBuildProgram successfully compiled cached binary: %s\n",binaryFileName);	
 			}
 			free (binary);
+			
+		} else
+		{
+			b3Warning("Cannot open cached binary: %s\n",binaryFileName);
 		}
 	}
 	
-	}
+	
-#endif //_WIN32
+	
+	
+	
+	
+	
+	
 	
 	if (!m_cpProgram)
 	{
@@ -875,7 +919,6 @@ cl_program b3OpenCLUtils_compileCLProgramFromString(cl_context clContext, cl_dev
 			return 0;
 		}
 
-#ifdef _WIN32
 
 		if( clFileNameForCaching )
 		{	//	write to binary
@@ -918,7 +961,6 @@ cl_program b3OpenCLUtils_compileCLProgramFromString(cl_context clContext, cl_dev
 				free (binary);
 			}
 		}
-#endif //_WIN32
 
 		free(compileFlags);
 

src/Bullet3OpenCL/Initialize/b3OpenCLUtils.h

@@ -54,6 +54,9 @@ void b3OpenCLUtils_printPlatformInfo(cl_platform_id platform);
 
 const char* b3OpenCLUtils_getSdkVendorName();
 	
+///set the path (directory/folder) where the compiled OpenCL kernel are stored
+void b3OpenCLUtils_setCachePath(const char* path);
+	
 cl_context 	b3OpenCLUtils_createContextFromPlatform(cl_platform_id platform, cl_device_type deviceType, cl_int* pErrNum, void* pGLCtx , void* pGLDC ,int preferredDeviceIndex , int preferredPlatformIndex);
 
 #ifdef __cplusplus
@@ -173,6 +176,10 @@ struct b3OpenCLUtils
 	{
 		return b3OpenCLUtils_createContextFromPlatform(platform, deviceType, pErrNum, pGLCtx,pGLDC,preferredDeviceIndex, preferredPlatformIndex);
 	}
+	static void setCachePath(const char* path)
+	{
+		b3OpenCLUtils_setCachePath(path);
+	}
 };
 
 #endif //__cplusplus