1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4
5 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include "namespace.h"
34 #include <signal.h>
35 #include <errno.h>
36 #include <stdlib.h>
37 #include <pthread.h>
38 #include "un-namespace.h"
39
40 #include "thr_private.h"
41
42 #undef pthread_cleanup_push
43 #undef pthread_cleanup_pop
44
45 /* old binary compatible interfaces */
46 __weak_reference(_thr_cleanup_pop, pthread_cleanup_pop);
47 __weak_reference(_thr_cleanup_pop, _pthread_cleanup_pop);
48 __weak_reference(_thr_cleanup_push, pthread_cleanup_push);
49 __weak_reference(_thr_cleanup_push, _pthread_cleanup_push);
50
51 /* help static linking when libc symbols have preference */
52 __weak_reference(__thr_cleanup_push_imp, __pthread_cleanup_push_imp);
53 __weak_reference(__thr_cleanup_pop_imp, __pthread_cleanup_pop_imp);
54
55 void
__thr_cleanup_push_imp(void (* routine)(void *),void * arg,struct _pthread_cleanup_info * info)56 __thr_cleanup_push_imp(void (*routine)(void *), void *arg,
57 struct _pthread_cleanup_info *info)
58 {
59 struct pthread *curthread = _get_curthread();
60 struct pthread_cleanup *newbuf;
61
62 newbuf = (void *)info;
63 newbuf->routine = routine;
64 newbuf->routine_arg = arg;
65 newbuf->onheap = 0;
66 newbuf->prev = curthread->cleanup;
67 curthread->cleanup = newbuf;
68 }
69
70 void
__thr_cleanup_pop_imp(int execute)71 __thr_cleanup_pop_imp(int execute)
72 {
73 struct pthread *curthread = _get_curthread();
74 struct pthread_cleanup *old;
75
76 if ((old = curthread->cleanup) != NULL) {
77 curthread->cleanup = old->prev;
78 if (execute)
79 old->routine(old->routine_arg);
80 if (old->onheap)
81 free(old);
82 }
83 }
84
85 void
_thr_cleanup_push(void (* routine)(void *),void * arg)86 _thr_cleanup_push(void (*routine)(void *), void *arg)
87 {
88 struct pthread *curthread = _get_curthread();
89 struct pthread_cleanup *newbuf;
90 #ifdef _PTHREAD_FORCED_UNWIND
91 curthread->unwind_disabled = 1;
92 #endif
93 if ((newbuf = (struct pthread_cleanup *)
94 malloc(sizeof(struct pthread_cleanup))) != NULL) {
95 newbuf->routine = routine;
96 newbuf->routine_arg = arg;
97 newbuf->onheap = 1;
98 newbuf->prev = curthread->cleanup;
99 curthread->cleanup = newbuf;
100 }
101 }
102
103 void
_thr_cleanup_pop(int execute)104 _thr_cleanup_pop(int execute)
105 {
106 __pthread_cleanup_pop_imp(execute);
107 }
108