xref: /freebsd/lib/libthr/thread/thr_clean.c (revision 7aa383846770374466b1dcb2cefd71bde9acf463)
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 
32 #include "namespace.h"
33 #include <signal.h>
34 #include <errno.h>
35 #include <stdlib.h>
36 #include <pthread.h>
37 #include "un-namespace.h"
38 
39 #include "thr_private.h"
40 
41 #undef pthread_cleanup_push
42 #undef pthread_cleanup_pop
43 
44 /* old binary compatible interfaces */
45 __weak_reference(_pthread_cleanup_push, pthread_cleanup_push);
46 __weak_reference(_pthread_cleanup_pop, pthread_cleanup_pop);
47 
48 void
49 __pthread_cleanup_push_imp(void (*routine)(void *), void *arg,
50 	struct _pthread_cleanup_info *info)
51 {
52 	struct pthread	*curthread = _get_curthread();
53 	struct pthread_cleanup *newbuf;
54 
55 	newbuf = (void *)info;
56 	newbuf->routine = routine;
57 	newbuf->routine_arg = arg;
58 	newbuf->onheap = 0;
59 	newbuf->prev = curthread->cleanup;
60 	curthread->cleanup = newbuf;
61 }
62 
63 void
64 __pthread_cleanup_pop_imp(int execute)
65 {
66 	struct pthread	*curthread = _get_curthread();
67 	struct pthread_cleanup *old;
68 
69 	if ((old = curthread->cleanup) != NULL) {
70 		curthread->cleanup = old->prev;
71 		if (execute)
72 			old->routine(old->routine_arg);
73 		if (old->onheap)
74 			free(old);
75 	}
76 }
77 
78 void
79 _pthread_cleanup_push(void (*routine) (void *), void *arg)
80 {
81 	struct pthread	*curthread = _get_curthread();
82 	struct pthread_cleanup *newbuf;
83 
84 	if ((newbuf = (struct pthread_cleanup *)
85 	    malloc(sizeof(struct _pthread_cleanup_info))) != NULL) {
86 		newbuf->routine = routine;
87 		newbuf->routine_arg = arg;
88 		newbuf->onheap = 1;
89 		newbuf->prev = curthread->cleanup;
90 		curthread->cleanup = newbuf;
91 	}
92 }
93 
94 void
95 _pthread_cleanup_pop(int execute)
96 {
97 	__pthread_cleanup_pop_imp(execute);
98 }
99