mem.c
上传用户:shmaik
上传日期:2014-06-01
资源大小:45093k
文件大小:1k
- static char rcsid[] = "$Id: H:/drh/idioms/book/RCS/mem.doc,v 1.12 1997/10/27 23:08:05 drh Exp $";
- #include <stdlib.h>
- #include <stddef.h>
- #include "assert.h"
- #include "except.h"
- #include "mem.h"
- const Except_T Mem_Failed = { "Allocation Failed" };
- void *Mem_alloc(long nbytes, const char *file, int line){
- void *ptr;
- assert(nbytes > 0);
- ptr = malloc(nbytes);
- if (ptr == NULL)
- {
- if (file == NULL)
- RAISE(Mem_Failed);
- else
- Except_raise(&Mem_Failed, file, line);
- }
- return ptr;
- }
- void *Mem_calloc(long count, long nbytes,
- const char *file, int line) {
- void *ptr;
- assert(count > 0);
- assert(nbytes > 0);
- ptr = calloc(count, nbytes);
- if (ptr == NULL)
- {
- if (file == NULL)
- RAISE(Mem_Failed);
- else
- Except_raise(&Mem_Failed, file, line);
- }
- return ptr;
- }
- void Mem_free(void *ptr, const char *file, int line) {
- if (ptr)
- free(ptr);
- }
- void *Mem_resize(void *ptr, long nbytes,
- const char *file, int line) {
- assert(ptr);
- assert(nbytes > 0);
- ptr = realloc(ptr, nbytes);
- if (ptr == NULL)
- {
- if (file == NULL)
- RAISE(Mem_Failed);
- else
- Except_raise(&Mem_Failed, file, line);
- }
- return ptr;
- }