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
37 #include "thr_private.h"
39 void _pthread_exit(void *status);
41 __weak_reference(_pthread_exit, pthread_exit);
44 _thread_exit(const char *fname, int lineno, const char *msg)
47 /* Write an error message to the standard error file descriptor: */
49 "Fatal error '%s' at line %d in file %s (errno = %d)\n",
50 msg, lineno, fname, errno);
56 * Only called when a thread is cancelled. It may be more useful
57 * to call it from pthread_exit() if other ways of asynchronous or
58 * abnormal thread termination can be found.
61 _thr_exit_cleanup(void)
63 struct pthread *curthread = _get_curthread();
66 * POSIX states that cancellation/termination of a thread should
67 * not release any visible resources (such as mutexes) and that
68 * it is the applications responsibility. Resources that are
69 * internal to the threads library, including file and fd locks,
70 * are not visible to the application and need to be released.
72 /* Unlock all private mutexes: */
73 _mutex_unlock_private(curthread);
76 * This still isn't quite correct because we don't account
77 * for held spinlocks (see libc/stdlib/malloc.c).
82 _pthread_exit(void *status)
84 struct pthread *curthread = _get_curthread();
86 /* Check if this thread is already in the process of exiting: */
87 if (curthread->cancelling) {
89 snprintf(msg, sizeof(msg), "Thread %p has called "
90 "pthread_exit() from a destructor. POSIX 1003.1 "
91 "1996 s16.2.5.2 does not allow this!", curthread);
95 /* Flag this thread as exiting. */
96 curthread->cancelling = 1;
100 /* Save the return value: */
101 curthread->ret = status;
102 while (curthread->cleanup != NULL) {
103 _pthread_cleanup_pop(1);
106 /* Check if there is thread specific data: */
107 if (curthread->specific != NULL) {
108 /* Run the thread-specific data destructors: */
109 _thread_cleanupspecific();
112 if (!_thr_isthreaded())
115 THREAD_LIST_LOCK(curthread);
116 _thread_active_threads--;
117 if (_thread_active_threads == 0) {
118 THREAD_LIST_UNLOCK(curthread);
123 curthread->state = PS_DEAD;
124 THR_UNLOCK(curthread);
126 * Thread was created with initial refcount 1, we drop the
127 * reference count to allow it to be garbage collected.
129 curthread->refcount--;
130 if (curthread->tlflags & TLFLAGS_DETACHED)
131 THR_GCLIST_ADD(curthread);
132 THREAD_LIST_UNLOCK(curthread);
133 if (SHOULD_REPORT_EVENT(curthread, TD_DEATH))
134 _thr_report_death(curthread);
137 * Kernel will do wakeup at the address, so joiner thread
138 * will be resumed if it is sleeping at the address.
140 thr_exit(&curthread->tid);
141 PANIC("thr_exit() returned");