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/*-------------------------------------------------------------------------
*
* palloc.c--
* POSTGRES memory allocator code.
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/mmgr/Attic/palloc.c,v 1.6 1998/02/26 04:38:22 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include <string.h>
#include "c.h"
#include "utils/mcxt.h"
#include "utils/elog.h"
#include "utils/palloc.h"
#include "nodes/memnodes.h"
#include "utils/palloc.h"
/* ----------------------------------------------------------------
* User library functions
* ----------------------------------------------------------------
*/
#undef palloc
#undef pfree
#undef MemoryContextAlloc
#undef MemoryContextFree
#undef malloc
#undef free
/* define PALLOC_IS_MALLOC if you want palloc to go straight to the
raw malloc, without concern for the extra bookkeeping needed to
ensure garbage is collected at the end of transactions - jolly 1/12/94 */
/*
* palloc --
* Returns pointer to aligned memory of specified size.
*
* Exceptions:
* BadArgument if size < 1 or size >= MaxAllocSize.
* ExhaustedMemory if allocation fails.
* NonallocatedPointer if pointer was not returned by palloc or repalloc
* or may have been freed already.
*
* pfree --
* Frees memory associated with pointer returned from palloc or repalloc.
*
* Exceptions:
* BadArgument if pointer is invalid.
* FreeInWrongContext if pointer was allocated in a different "context."
* NonallocatedPointer if pointer was not returned by palloc or repalloc
* or may have been subsequently freed.
*/
void *
palloc(Size size)
{
#ifdef PALLOC_IS_MALLOC
return malloc(size);
#else
return (MemoryContextAlloc(CurrentMemoryContext, size));
#endif /* PALLOC_IS_MALLOC */
}
void
pfree(void *pointer)
{
#ifdef PALLOC_IS_MALLOC
free(pointer);
#else
MemoryContextFree(CurrentMemoryContext, pointer);
#endif /* PALLOC_IS_MALLOC */
}
/*
* repalloc --
* Returns pointer to aligned memory of specified size.
*
* Side effects:
* The returned memory is first filled with the contents of *pointer
* up to the minimum of size and psize(pointer). Pointer is freed.
*
* Exceptions:
* BadArgument if pointer is invalid or size < 1 or size >= MaxAllocSize.
* ExhaustedMemory if allocation fails.
* NonallocatedPointer if pointer was not returned by palloc or repalloc
* or may have been freed already.
*/
void *
repalloc(void *pointer, Size size)
{
#ifdef PALLOC_IS_MALLOC
return realloc(pointer, size);
#else
return (MemoryContextRealloc(CurrentMemoryContext, pointer, size));
#endif
}
/* pstrdup
allocates space for and copies a string
just like strdup except it uses palloc instead of malloc */
char *
pstrdup(char *string)
{
char *nstr;
nstr = (char *) palloc(strlen(string) + 1);
strcpy(nstr, string);
return nstr;
}
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