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