2 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 #include "namespace.h"
37 #include "un-namespace.h"
39 #include "thr_private.h"
41 void _pthread_exit(void *status);
43 __weak_reference(_pthread_exit, pthread_exit);
46 _thread_exit(const char *fname, int lineno, const char *msg)
49 /* Write an error message to the standard error file descriptor: */
51 "Fatal error '%s' at line %d in file %s (errno = %d)\n",
52 msg, lineno, fname, errno);
58 * Only called when a thread is cancelled. It may be more useful
59 * to call it from pthread_exit() if other ways of asynchronous or
60 * abnormal thread termination can be found.
63 _thr_exit_cleanup(void)
65 struct pthread *curthread = _get_curthread();
68 * POSIX states that cancellation/termination of a thread should
69 * not release any visible resources (such as mutexes) and that
70 * it is the applications responsibility. Resources that are
71 * internal to the threads library, including file and fd locks,
72 * are not visible to the application and need to be released.
74 /* Unlock all private mutexes: */
75 _mutex_unlock_private(curthread);
78 * This still isn't quite correct because we don't account
79 * for held spinlocks (see libc/stdlib/malloc.c).
84 _pthread_exit(void *status)
86 struct pthread *curthread = _get_curthread();
88 /* Check if this thread is already in the process of exiting: */
89 if (curthread->cancelling) {
91 snprintf(msg, sizeof(msg), "Thread %p has called "
92 "pthread_exit() from a destructor. POSIX 1003.1 "
93 "1996 s16.2.5.2 does not allow this!", curthread);
97 /* Flag this thread as exiting. */
98 curthread->cancelling = 1;
102 /* Save the return value: */
103 curthread->ret = status;
104 while (curthread->cleanup != NULL) {
105 _pthread_cleanup_pop(1);
108 /* Check if there is thread specific data: */
109 if (curthread->specific != NULL) {
110 /* Run the thread-specific data destructors: */
111 _thread_cleanupspecific();
114 if (!_thr_isthreaded())
117 THREAD_LIST_LOCK(curthread);
118 _thread_active_threads--;
119 if (_thread_active_threads == 0) {
120 THREAD_LIST_UNLOCK(curthread);
125 curthread->state = PS_DEAD;
126 if (curthread->flags & THR_FLAGS_NEED_SUSPEND) {
128 _thr_umtx_wake(&curthread->cycle, INT_MAX, 0);
130 THR_UNLOCK(curthread);
132 * Thread was created with initial refcount 1, we drop the
133 * reference count to allow it to be garbage collected.
135 curthread->refcount--;
136 if (curthread->tlflags & TLFLAGS_DETACHED)
137 THR_GCLIST_ADD(curthread);
138 THREAD_LIST_UNLOCK(curthread);
139 if (!curthread->force_exit && SHOULD_REPORT_EVENT(curthread, TD_DEATH))
140 _thr_report_death(curthread);
143 * Kernel will do wakeup at the address, so joiner thread
144 * will be resumed if it is sleeping at the address.
146 thr_exit(&curthread->tid);
147 PANIC("thr_exit() returned");