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Split MemSet into three parts to constant comparisons can be optimized

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away by the compiler;  used by palloc0.
This commit is contained in:
Bruce Momjian
2002-11-13 00:37:06 +00:00
parent 266c3679f7
commit aaa3a0caa6
3 changed files with 39 additions and 25 deletions
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10
src/include/utils/palloc.h
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@ -21,7 +21,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: palloc.h,v 1.22 2002/11/10 02:17:25 momjian Exp $
* $Id: palloc.h,v 1.23 2002/11/13 00:37:06 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -46,11 +46,15 @@ extern DLLIMPORT MemoryContext CurrentMemoryContext;
* Fundamental memory-allocation operations (more are in utils/memutils.h)
*/
extern void *MemoryContextAlloc(MemoryContext context, Size size);
extern void *MemoryContextAllocZero(MemoryContext context, Size size);
extern void *MemoryContextAllocPalloc0(MemoryContext context, Size size);
#define palloc(sz) MemoryContextAlloc(CurrentMemoryContext, (sz))
#define palloc0(sz) MemoryContextAllocZero(CurrentMemoryContext, (sz))
/* We assume palloc() is already int-aligned */
#define palloc0(sz) \
( MemSetTest(0, (sz)) ? \
MemoryContextAllocPalloc0(CurrentMemoryContext, (sz)) : \
memset(palloc(sz), 0, (sz)))
extern void pfree(void *pointer);