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//========= 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
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