1 files changed, 61 insertions, 0 deletions
diff --git a/togl/linuxwin/intelglmallocworkaround.h b/togl/linuxwin/intelglmallocworkaround.h
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+++ b/togl/linuxwin/intelglmallocworkaround.h
@@ -0,0 +1,61 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//                       TOGL CODE LICENSE
+//
+//  Copyright 2011-2014 Valve Corporation
+//  All Rights Reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+// intelglmallocworkaround.h
+//  class responsible for setting up a malloc override that zeroes allocated 
+//  memory of less than 96 bytes. this is to work around a bug
+//  in the Intel GLSL compiler on Mac OS X 10.8 due to uninitialized memory.
+//  
+//  96 was chosen due to this quote from Apple: 
+//    "I verified that the size of the structure is exactly 64 bytes on 10.8.3, 10.8.4 and will be on 10.8.5."
+//
+//  certain GLSL shaders would (intermittently) cause a crash the first time they
+//  were drawn, and the bug has supposedly been fixed in 10.9, but is unlikely to
+//  ever make it to 10.8.
+//
+//===============================================================================
+
+#ifndef INTELGLMALLOCWORKAROUND_H
+#define	INTELGLMALLOCWORKAROUND_H
+
+#include <stdlib.h>
+
+class IntelGLMallocWorkaround
+{
+public:
+	static IntelGLMallocWorkaround *Get();
+	bool Enable();
+
+protected:
+	IntelGLMallocWorkaround() :m_pfnMallocReentry(NULL) {}
+	~IntelGLMallocWorkaround() {}
+
+	static IntelGLMallocWorkaround *s_pWorkaround;
+	static void* ZeroingAlloc(size_t);
+
+	typedef void* (*pfnMalloc_t)(size_t);
+	pfnMalloc_t m_pfnMallocReentry;
+};
+
+#endif // INTELGLMALLOCWORKAROUND_H
+\ No newline at end of file