163 lines
2.6 KiB
C
163 lines
2.6 KiB
C
/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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MEMORY.C
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Abstract:
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This file contains the routines that deal with memory management.
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Author:
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Rajen Shah (rajens) 12-Jul-1991
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[Environment:]
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User Mode - Win32, except for NTSTATUS returned by some functions.
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Revision History:
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Jonathan Schwartz (jschwart) 10-Dec-1999
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Have the Eventlog use its own heap
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--*/
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//
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// INCLUDES
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//
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#include <eventp.h>
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//
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// GLOBALS
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//
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PVOID g_pElfHeap;
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VOID
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ElfpCreateHeap(
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VOID
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)
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{
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DWORD dwHeapFlags;
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#if DBG
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//
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// Turn on tail and free checking on debug builds.
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//
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dwHeapFlags = HEAP_GROWABLE
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| HEAP_FREE_CHECKING_ENABLED
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| HEAP_TAIL_CHECKING_ENABLED;
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#else // ndef DBG
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dwHeapFlags = HEAP_GROWABLE;
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#endif // DBG
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//
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// Create the heap
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//
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g_pElfHeap = RtlCreateHeap(dwHeapFlags, // Flags
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NULL, // HeapBase
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32 * 1024, // ReserveSize (32K)
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4096, // CommitSize (4K)
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NULL, // HeapLock
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NULL); // GrowthThreshhold
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if (g_pElfHeap == NULL)
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{
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ELF_LOG0(ERROR,
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"ElfpCreateHeap: RtlCreateHeap failed -- using process heap\n");
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g_pElfHeap = RtlProcessHeap();
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}
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return;
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}
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PVOID
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ElfpAllocateBuffer(
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ULONG Size
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)
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/*++
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Routine Description:
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Allocate a buffer of the given size
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Arguments:
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Number of bytes to allocate
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Return Value:
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Pointer to allocated buffer (or NULL).
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--*/
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{
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return RtlAllocateHeap(g_pElfHeap, 0, Size);
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}
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BOOLEAN
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ElfpFreeBuffer(
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PVOID Address
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)
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/*++
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Routine Description:
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Frees a buffer previously allocated by ElfpAllocateBuffer.
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Arguments:
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Pointer to buffer.
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Return Value:
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TRUE if the block was properly freed, FALSE if not
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Note:
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--*/
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{
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//
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// Note that RtlFreeHeap handles NULL
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//
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return RtlFreeHeap(g_pElfHeap, 0, Address);
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}
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PVOID
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MIDL_user_allocate (
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size_t Size
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)
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{
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//
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// The server-side RPC calls in the Eventlog expect any
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// UNICODE_STRINGs passed in either to have a length equal
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// to the max length or to be NULL-terminated. We need to
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// zero the memory here to supply that NULL-termination.
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//
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return RtlAllocateHeap(g_pElfHeap, HEAP_ZERO_MEMORY, Size);
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}
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VOID
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MIDL_user_free (
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PVOID Address
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)
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{
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ElfpFreeBuffer(Address);
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}
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