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Create releng/7.2 from stable/7 in preparation for 7.2-RELEASE.
[FreeBSD/releng/7.2.git] / lib / libkse / thread / thr_clean.c
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  * $FreeBSD$
30  */
31 #include <signal.h>
32 #include <errno.h>
33 #include <stdlib.h>
34 #include <pthread.h>
35 #include "thr_private.h"
36
37 LT10_COMPAT_PRIVATE(_pthread_cleanup_push);
38 LT10_COMPAT_DEFAULT(pthread_cleanup_push);
39 LT10_COMPAT_PRIVATE(_pthread_cleanup_pop);
40 LT10_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
45 void
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
62 void
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 }