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38 lines
1.3 KiB
38 lines
1.3 KiB
//========= Copyright Valve Corporation, All rights reserved. ============// |
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// |
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// Purpose: |
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// |
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//=============================================================================// |
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#ifndef MEM_HELPERS_H |
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#define MEM_HELPERS_H |
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#ifdef _WIN32 |
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#pragma once |
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#endif |
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// Normally, the runtime libraries like to mess with the memory returned by malloc(), |
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// which can create problems trying to repro bugs in debug builds or in the debugger. |
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// |
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// If the debugger is present, it initializes data to 0xbaadf00d, which makes floating |
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// point numbers come out to about 0.1. |
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// |
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// If the debugger is not present, and it's a debug build, then you get 0xcdcdcdcd, |
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// which is about 25 million. |
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// |
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// Otherwise, you get uninitialized memory. |
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// |
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// In here, we make sure the memory is either random garbage, or it's set to |
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// 0xffeeffee, which casts to a NAN. |
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extern bool g_bInitMemory; |
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#define ApplyMemoryInitializations( pMem, nSize ) if ( !g_bInitMemory ) ; else { DoApplyMemoryInitializations( pMem, nSize ); } |
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void DoApplyMemoryInitializations( void *pMem, int nSize ); |
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size_t CalcHeapUsed(); |
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// Call this to reserve the bottom 4 GB of memory in order to ensure that we will |
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// get crashes if we put pointers in DWORDs or ints. This will be a NOP on some |
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// platforms (Xbox 360, PS3, 32-bit Windows, etc.) |
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void ReserveBottomMemory(); |
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#endif // MEM_HELPERS_H
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