149 lines
3.3 KiB
C
149 lines
3.3 KiB
C
|
//================================================================================
|
||
|
|
// Copyright (C) 1997 Microsoft Corporation
|
||
|
|
// Author: RameshV
|
||
|
|
// Description: some memory handling stuff
|
||
|
|
//================================================================================
|
||
|
|
|
||
|
|
#include <mm.h>
|
||
|
|
#include <align.h>
|
||
|
|
|
||
|
|
#if DBG
|
||
|
|
#define STATIC static
|
||
|
|
#else
|
||
|
|
#define STATIC
|
||
|
|
#endif
|
||
|
|
|
||
|
|
STATIC HANDLE MemHeapHandle = NULL;
|
||
|
|
static DWORD Initialized = FALSE;
|
||
|
|
static DWORD UseHeap = 0;
|
||
|
|
ULONG MemNBytesAllocated = 0;
|
||
|
|
|
||
|
|
//BeginExport(function)
|
||
|
|
DWORD
|
||
|
|
MemInit(
|
||
|
|
VOID
|
||
|
|
) //EndExport(function)
|
||
|
|
{
|
||
|
|
Require(Initialized == FALSE);
|
||
|
|
MemHeapHandle = HeapCreate(
|
||
|
|
/* flOptions */ 0,
|
||
|
|
/* dwInitialSize */ 64000,
|
||
|
|
/* dwMaximumSize */ 0
|
||
|
|
);
|
||
|
|
if( MemHeapHandle == NULL ) return GetLastError();
|
||
|
|
Initialized = TRUE;
|
||
|
|
UseHeap = 1;
|
||
|
|
return ERROR_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
//BeginExport(function)
|
||
|
|
VOID
|
||
|
|
MemCleanup(
|
||
|
|
VOID
|
||
|
|
) //EndExport(function)
|
||
|
|
{
|
||
|
|
BOOL Status;
|
||
|
|
|
||
|
|
if( 0 == Initialized ) return;
|
||
|
|
Initialized --;
|
||
|
|
Require(MemHeapHandle);
|
||
|
|
Status = HeapDestroy(MemHeapHandle);
|
||
|
|
MemHeapHandle = NULL;
|
||
|
|
Require(FALSE != Status);
|
||
|
|
Require(0 == Initialized);
|
||
|
|
UseHeap = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
LPVOID _inline
|
||
|
|
MemAllocInternal(
|
||
|
|
IN DWORD nBytes
|
||
|
|
)
|
||
|
|
{
|
||
|
|
LPVOID Ptr;
|
||
|
|
if( 0 == UseHeap ) {
|
||
|
|
Ptr = LocalAlloc(LMEM_FIXED, nBytes);
|
||
|
|
// DbgPrint("MEM %08lx ALLOC\n", Ptr);
|
||
|
|
return Ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
if( NULL == MemHeapHandle ) return NULL;
|
||
|
|
|
||
|
|
return HeapAlloc(
|
||
|
|
/* hHeap */ MemHeapHandle,
|
||
|
|
/* dwFlags */ HEAP_ZERO_MEMORY,
|
||
|
|
/* dwBytes */ nBytes
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
DWORD _inline
|
||
|
|
MemFreeInternal(
|
||
|
|
IN LPVOID Mem
|
||
|
|
)
|
||
|
|
{
|
||
|
|
BOOL Status;
|
||
|
|
|
||
|
|
// DbgPrint("MEM %08lx FREE\n", Mem);
|
||
|
|
|
||
|
|
if( 0 == UseHeap ) {
|
||
|
|
if(NULL == LocalFree(Mem) )
|
||
|
|
return ERROR_SUCCESS;
|
||
|
|
return ERROR_INVALID_DATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
if( NULL == MemHeapHandle ) {
|
||
|
|
Require(FALSE);
|
||
|
|
return ERROR_INVALID_DATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = HeapFree(
|
||
|
|
/* hHeap */ MemHeapHandle,
|
||
|
|
/* dwFlags */ 0,
|
||
|
|
/* lpMem */ Mem
|
||
|
|
);
|
||
|
|
|
||
|
|
if( FALSE != Status ) return ERROR_SUCCESS;
|
||
|
|
return GetLastError();
|
||
|
|
}
|
||
|
|
|
||
|
|
//BeginExport(function)
|
||
|
|
LPVOID
|
||
|
|
MemAlloc(
|
||
|
|
IN DWORD nBytes
|
||
|
|
) //EndExport(function)
|
||
|
|
{
|
||
|
|
LPVOID Ptr;
|
||
|
|
|
||
|
|
#if DBG
|
||
|
|
Ptr = MemAllocInternal(ROUND_UP_COUNT(nBytes + sizeof(ULONG_PTR), ALIGN_WORST));
|
||
|
|
if( NULL == Ptr ) return Ptr;
|
||
|
|
*((ULONG_PTR *)Ptr) ++ = nBytes;
|
||
|
|
InterlockedExchangeAdd(&MemNBytesAllocated, nBytes);
|
||
|
|
return Ptr;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return MemAllocInternal(nBytes);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//BeginExport(function)
|
||
|
|
DWORD
|
||
|
|
MemFree(
|
||
|
|
IN LPVOID Mem
|
||
|
|
) //EndExport(function)
|
||
|
|
{
|
||
|
|
LPVOID Ptr;
|
||
|
|
|
||
|
|
#if DBG
|
||
|
|
Ptr = -1 + (ULONG_PTR *)Mem;
|
||
|
|
InterlockedExchangeAdd(&MemNBytesAllocated, - (LONG)(*(ULONG *)Ptr) );
|
||
|
|
return MemFreeInternal(Ptr);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return MemFreeInternal(Mem);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
//================================================================================
|
||
|
|
// end of file
|
||
|
|
//================================================================================
|