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/*----------------------------------------------------------------------------------
*
* mxct.c
* Postgres-XC memory context management code for applications.
*
* This module is for Postgres-XC application/utility programs. Sometimes,
* applications/utilities may need Postgres-XC internal functions which
* depends upon mcxt.c of gtm or Postgres.
*
* This module "virtualize" such module-dependent memory management.
*
* This code is for general use, which depends only upon confentional
* memory management functions.
*
* Copyright (c) 2013, Postgres-XC Development Group
*
*---------------------------------------------------------------------------------
*/
#include <stdlib.h>
#include <string.h>
#include "gen_alloc.h"
static void *current_cxt;
static void *memCxtAlloc(void *, size_t);
static void *memCxtRealloc(void *, size_t);
static void *memCxtAlloc0(void *, size_t);
static void memCxtFree(void *);
static void *memCxtAllocTop(size_t);
static void *memCxtCurrentContext(void);
static void *memCxtAlloc(void* current, size_t needed)
{
return(malloc(needed));
}
static void *memCxtRealloc(void *addr, size_t needed)
{
return(realloc(addr, needed));
}
static void *memCxtAlloc0(void *current, size_t needed)
{
void *allocated;
allocated = malloc(needed);
if (allocated == NULL)
return(NULL);
memset(allocated, 0, needed);
return(allocated);
}
static void memCxtFree(void *addr)
{
free(addr);
return;
}
static void *memCxtCurrentContext()
{
return((void *)¤t_cxt);
}
static void *memCxtAllocTop(size_t needed)
{
return(malloc(needed));
}
Gen_Alloc genAlloc_class = {(void *)memCxtAlloc,
(void *)memCxtAlloc0,
(void *)memCxtRealloc,
(void *)memCxtFree,
(void *)memCxtCurrentContext,
(void *)memCxtAllocTop};
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