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39 lines
1.2 KiB
39 lines
1.2 KiB
//============ Copyright (c) Valve Corporation, All rights reserved. ============
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//
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// intelglmallocworkaround.h
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// class responsible for setting up a malloc override that zeroes allocated
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// memory of less than 96 bytes. this is to work around a bug
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// in the Intel GLSL compiler on Mac OS X 10.8 due to uninitialized memory.
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//
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// 96 was chosen due to this quote from Apple:
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// "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."
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//
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// certain GLSL shaders would (intermittently) cause a crash the first time they
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// were drawn, and the bug has supposedly been fixed in 10.9, but is unlikely to
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// ever make it to 10.8.
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//
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//===============================================================================
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#ifndef INTELGLMALLOCWORKAROUND_H
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#define INTELGLMALLOCWORKAROUND_H
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#include <stdlib.h>
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class IntelGLMallocWorkaround
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{
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public:
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static IntelGLMallocWorkaround *Get();
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bool Enable();
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protected:
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IntelGLMallocWorkaround() :m_pfnMallocReentry(NULL) {}
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~IntelGLMallocWorkaround() {}
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static IntelGLMallocWorkaround *s_pWorkaround;
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static void* ZeroingAlloc(size_t);
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typedef void* (*pfnMalloc_t)(size_t);
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pfnMalloc_t m_pfnMallocReentry;
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};
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#endif // INTELGLMALLOCWORKAROUND_H
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