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 <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36#include "namespace.h"
37#include <signal.h>
38#include <errno.h>
39#include <stdlib.h>
40#include <pthread.h>
41#include "un-namespace.h"
42
43#include "thr_private.h"
44
45#undef pthread_cleanup_push
46#undef pthread_cleanup_pop
47
48/* old binary compatible interfaces */
49__weak_reference(_thr_cleanup_pop, pthread_cleanup_pop);
50__weak_reference(_thr_cleanup_pop, _pthread_cleanup_pop);
51__weak_reference(_thr_cleanup_push, pthread_cleanup_push);
52__weak_reference(_thr_cleanup_push, _pthread_cleanup_push);
53
54/* help static linking when libc symbols have preference */
55__weak_reference(__thr_cleanup_push_imp, __pthread_cleanup_push_imp);
56__weak_reference(__thr_cleanup_pop_imp, __pthread_cleanup_pop_imp);
57
58void
59__thr_cleanup_push_imp(void (*routine)(void *), void *arg,
60    struct _pthread_cleanup_info *info)
61{
62	struct pthread	*curthread = _get_curthread();
63	struct pthread_cleanup *newbuf;
64
65	newbuf = (void *)info;
66	newbuf->routine = routine;
67	newbuf->routine_arg = arg;
68	newbuf->onheap = 0;
69	newbuf->prev = curthread->cleanup;
70	curthread->cleanup = newbuf;
71}
72
73void
74__thr_cleanup_pop_imp(int execute)
75{
76	struct pthread	*curthread = _get_curthread();
77	struct pthread_cleanup *old;
78
79	if ((old = curthread->cleanup) != NULL) {
80		curthread->cleanup = old->prev;
81		if (execute)
82			old->routine(old->routine_arg);
83		if (old->onheap)
84			free(old);
85	}
86}
87
88void
89_thr_cleanup_push(void (*routine)(void *), void *arg)
90{
91	struct pthread	*curthread = _get_curthread();
92	struct pthread_cleanup *newbuf;
93#ifdef _PTHREAD_FORCED_UNWIND
94	curthread->unwind_disabled = 1;
95#endif
96	if ((newbuf = (struct pthread_cleanup *)
97	    malloc(sizeof(struct pthread_cleanup))) != NULL) {
98		newbuf->routine = routine;
99		newbuf->routine_arg = arg;
100		newbuf->onheap = 1;
101		newbuf->prev = curthread->cleanup;
102		curthread->cleanup = newbuf;
103	}
104}
105
106void
107_thr_cleanup_pop(int execute)
108{
109	__pthread_cleanup_pop_imp(execute);
110}
111