81 lines
1.5 KiB
C++
81 lines
1.5 KiB
C++
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/*++
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Copyright (c) 2002 Microsoft Corporation
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Module Name:
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GlobalMemoryStatusTrim.cpp
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Abstract:
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Limits the amount of swap space and physical memory returned from the
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GlobalMemoryStatus API. This is necessary for some apps run on 64 bit
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machines which have over 2 gig of memory.
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Notes:
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This is a general purpose shim.
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History:
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04/19/2002 mnikkel Created
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--*/
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#include "precomp.h"
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#include "CharVector.h"
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IMPLEMENT_SHIM_BEGIN(GlobalMemoryStatusTrim)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(GlobalMemoryStatus)
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APIHOOK_ENUM_END
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/*++
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Limit the swap space and physical memory size
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--*/
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VOID
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APIHOOK(GlobalMemoryStatus)(
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LPMEMORYSTATUS lpBuffer
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)
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{
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ORIGINAL_API(GlobalMemoryStatus)(lpBuffer);
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// change page file to always be 2 gig or less
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if (lpBuffer->dwTotalPageFile > 0x7FFFFFFF) {
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lpBuffer->dwTotalPageFile = 0x7FFFFFFF;
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}
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if (lpBuffer->dwAvailPageFile > 0x7FFFFFFF) {
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lpBuffer->dwAvailPageFile = 0x7FFFFFFF;
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}
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// change physical memory to always be 1 gig or less
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if (lpBuffer->dwTotalPhys > 0x3FFFFFFF) {
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lpBuffer->dwTotalPhys = 0x3FFFFFFF;
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}
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if (lpBuffer->dwAvailPhys > 0x3FFFFFFF) {
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lpBuffer->dwAvailPhys = 0x3FFFFFFF;
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}
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return;
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}
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/*++
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Register hooked functions
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--*/
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HOOK_BEGIN
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APIHOOK_ENTRY(KERNEL32.DLL, GlobalMemoryStatus)
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HOOK_END
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IMPLEMENT_SHIM_END
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