gwmem-native.c

来自「mms client」· C语言 代码 · 共 68 行

/*
 * gwmem-native.h - memory managment wrapper functions, native flavor
 *
 * Lars Wirzenius
 */

#include <stdlib.h>
#include <errno.h>
#include <string.h>

#include "gwlib.h"

/* 
 * In this module, we must use the real versions so let's undefine the
 * accident protectors. 
 */
#undef malloc
#undef realloc
#undef free

void *gw_native_noop(void *ptr) { return ptr; }

void *gw_native_malloc(size_t size)
{
    void *ptr;

    /* ANSI C89 says malloc(0) is implementation-defined.  Avoid it. */
    gw_assert(size > 0);

    ptr = malloc(size);
    if (ptr == NULL)
        panic(errno, "Memory allocation failed");

    return ptr;
}


void *gw_native_realloc(void *ptr, size_t size)
{
    void *new_ptr;

    gw_assert(size > 0);

    new_ptr = realloc(ptr, size);
    if (new_ptr == NULL)
        panic(errno, "Memory re-allocation failed");

    return new_ptr;
}


void gw_native_free(void *ptr)
{
    free(ptr);
}


char *gw_native_strdup(const char *str)
{
    char *copy;

    gw_assert(str != NULL);

    copy = gw_native_malloc(strlen(str) + 1);
    strcpy(copy, str);
    return copy;
}