exit.c revision 251069 
1/*-
2 * Copyright (c) 1990, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31static char sccsid[] = "@(#)exit.c	8.1 (Berkeley) 6/4/93";
32#endif /* LIBC_SCCS and not lint */
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/lib/libc/stdlib/exit.c 251069 2013-05-28 20:57:40Z emaste $");
35
36#include "namespace.h"
37#include <stdlib.h>
38#include <unistd.h>
39#include "un-namespace.h"
40
41#include "atexit.h"
42#include "libc_private.h"
43
44void (*__cleanup)(void);
45
46/*
47 * This variable is zero until a process has created a thread.
48 * It is used to avoid calling locking functions in libc when they
49 * are not required. By default, libc is intended to be(come)
50 * thread-safe, but without a (significant) penalty to non-threaded
51 * processes.
52 */
53int	__isthreaded	= 0;
54
55/*
56 * Exit, flushing stdio buffers if necessary.
57 */
58void
59exit(status)
60	int status;
61{
62	/* Ensure that the auto-initialization routine is linked in: */
63	extern int _thread_autoinit_dummy_decl;
64
65	_thread_autoinit_dummy_decl = 1;
66
67	__cxa_finalize(NULL);
68	if (__cleanup)
69		(*__cleanup)();
70	_exit(status);
71}
72