mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 14:30:06 +00:00
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/* Copyright (C) 1991 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
#include <stdlib.h>
|
|
#include "exit.h"
|
|
|
|
|
|
/* Register FUNC to be executed by `exit'. */
|
|
int
|
|
DEFUN(atexit, (func), void EXFUN((*func), (NOARGS)))
|
|
{
|
|
struct exit_function *new = __new_exitfn();
|
|
|
|
if (new == NULL)
|
|
return -1;
|
|
|
|
new->flavor = ef_at;
|
|
new->func.at = func;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct exit_function_list fnlist = { NULL, 0, };
|
|
struct exit_function_list *__exit_funcs = &fnlist;
|
|
|
|
struct exit_function *
|
|
DEFUN_VOID(__new_exitfn)
|
|
{
|
|
register struct exit_function_list *l;
|
|
|
|
for (l = __exit_funcs; l != NULL; l = l->next)
|
|
{
|
|
register size_t i;
|
|
for (i = 0; i < l->idx; ++i)
|
|
if (l->fns[i].flavor == ef_free)
|
|
return &l->fns[i];
|
|
if (l->idx < sizeof(l->fns) / sizeof(l->fns[0]))
|
|
return &l->fns[l->idx++];
|
|
}
|
|
|
|
l = (struct exit_function_list *) malloc(sizeof(struct exit_function_list));
|
|
if (l == NULL)
|
|
return NULL;
|
|
l->next = __exit_funcs;
|
|
__exit_funcs = l;
|
|
|
|
l->idx = 1;
|
|
return &l->fns[0];
|
|
}
|