Leaked source code of windows server 2003
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181 lines
3.4 KiB

/* Copyright (c) 1999 Microsoft Corporation */
#include "mymem.h"
#include "mylog.h"
extern PPHONESP_MEMINFO gpMemFirst, gpMemLast;
extern CRITICAL_SECTION csMemoryList;
extern BOOL gbBreakOnLeak;
extern HANDLE ghHeap;
#if DBG
LPVOID
WINAPI
MemAllocReal(
DWORD dwSize,
DWORD dwLine,
PSTR pszFile
)
{
//
// Alloc 16 extra bytes so we can make sure the pointer we pass back
// is 64-bit aligned & have space to store the original pointer
//
PPHONESP_MEMINFO pHold;
PDWORD_PTR pAligned;
PBYTE p;
p = (LPBYTE)HeapAlloc(ghHeap, HEAP_ZERO_MEMORY, dwSize + sizeof(PHONESP_MEMINFO) + 16);
if (p == NULL)
{
return NULL;
}
// note note note - this only works because mymeminfo is
// a 16 bit multiple in size. if it wasn't, this
// align stuff would cause problems.
pAligned = (PDWORD_PTR) (p + 8 - (((DWORD_PTR) p) & (DWORD_PTR)0x7));
*pAligned = (DWORD_PTR) p;
pHold = (PPHONESP_MEMINFO)((DWORD_PTR)pAligned + 8);
pHold->dwSize = dwSize;
pHold->dwLine = dwLine;
pHold->pszFile = pszFile;
EnterCriticalSection(&csMemoryList);
if (gpMemLast != NULL)
{
gpMemLast->pNext = pHold;
pHold->pPrev = gpMemLast;
gpMemLast = pHold;
}
else
{
gpMemFirst = gpMemLast = pHold;
}
LeaveCriticalSection(&csMemoryList);
return (LPVOID)(pHold + 1);
}
#else
LPVOID
WINAPI
MemAllocReal(
DWORD dwSize
)
{
PDWORD_PTR pAligned;
PBYTE p;
if (p = (LPBYTE)HeapAlloc(ghHeap, HEAP_ZERO_MEMORY, dwSize + 16))
{
pAligned = (PDWORD_PTR) (p + 8 - (((DWORD_PTR) p) & (DWORD_PTR)0x7));
*pAligned = (DWORD_PTR) p;
pAligned = (PDWORD_PTR)((DWORD_PTR)pAligned + 8);
}
else
{
pAligned = NULL;
}
return ((LPVOID) pAligned);
}
#endif
VOID
WINAPI
MemFree(
LPVOID p
)
{
LPVOID pOrig;
if (p == NULL)
{
return;
}
#if DBG
{
PPHONESP_MEMINFO pHold;
pHold = (PPHONESP_MEMINFO)(((LPBYTE)p) - sizeof(PHONESP_MEMINFO));
EnterCriticalSection(&csMemoryList);
if (pHold->pPrev)
{
pHold->pPrev->pNext = pHold->pNext;
}
else
{
gpMemFirst = pHold->pNext;
}
if (pHold->pNext)
{
pHold->pNext->pPrev = pHold->pPrev;
}
else
{
gpMemLast = pHold->pPrev;
}
LeaveCriticalSection(&csMemoryList);
pOrig = (LPVOID) *((PDWORD_PTR)((DWORD_PTR)pHold - 8));
}
#else
pOrig = (LPVOID) *((PDWORD_PTR)((DWORD_PTR)p - 8));
#endif
HeapFree(ghHeap,0, pOrig);
return;
}
#if DBG
void
DumpMemoryList()
{
PPHONESP_MEMINFO pHold;
if (gpMemFirst == NULL)
{
LOG((PHONESP_TRACE, "DumpMemoryList: All memory deallocated"));
return;
}
pHold = gpMemFirst;
while (pHold)
{
LOG((PHONESP_ERROR, "DumpMemoryList: %lx not freed - LINE %d FILE %s!", pHold+1, pHold->dwLine, pHold->pszFile));
pHold = pHold->pNext;
}
if (gbBreakOnLeak)
{
DebugBreak();
}
}
#endif