thr_clean.c revision 172491 
1/*
2 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
3 * 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 author nor the names of any co-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 JOHN BIRRELL 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 AUTHOR 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 * $FreeBSD: head/lib/libkse/thread/thr_clean.c 165967 2007-01-12 07:26:21Z imp $
30 */
31#include <signal.h>
32#include <errno.h>
33#include <stdlib.h>
34#include <pthread.h>
35#include "thr_private.h"
36
37LT10_COMPAT_PRIVATE(_pthread_cleanup_push);
38LT10_COMPAT_DEFAULT(pthread_cleanup_push);
39LT10_COMPAT_PRIVATE(_pthread_cleanup_pop);
40LT10_COMPAT_DEFAULT(pthread_cleanup_pop);
41
42__weak_reference(_pthread_cleanup_push, pthread_cleanup_push);
43__weak_reference(_pthread_cleanup_pop, pthread_cleanup_pop);
44
45void
46_pthread_cleanup_push(void (*routine) (void *), void *routine_arg)
47{
48	struct pthread	*curthread = _get_curthread();
49	struct pthread_cleanup *new;
50
51	if ((new = (struct pthread_cleanup *)
52	    malloc(sizeof(struct pthread_cleanup))) != NULL) {
53		new->routine = routine;
54		new->routine_arg = routine_arg;
55		new->onstack = 0;
56		new->next = curthread->cleanup;
57
58		curthread->cleanup = new;
59	}
60}
61
62void
63_pthread_cleanup_pop(int execute)
64{
65	struct pthread	*curthread = _get_curthread();
66	struct pthread_cleanup *old;
67
68	if ((old = curthread->cleanup) != NULL) {
69		curthread->cleanup = old->next;
70		if (execute) {
71			old->routine(old->routine_arg);
72		}
73		if (old->onstack == 0)
74			free(old);
75	}
76}
77