2 * Copyright (c) 1995 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
33 #include "thr_private.h"
35 static struct kse_mailbox *resume_common(struct pthread *);
37 LT10_COMPAT_PRIVATE(_pthread_resume_np);
38 LT10_COMPAT_DEFAULT(pthread_resume_np);
39 LT10_COMPAT_PRIVATE(_pthread_resume_all_np);
40 LT10_COMPAT_DEFAULT(pthread_resume_all_np);
42 __weak_reference(_pthread_resume_np, pthread_resume_np);
43 __weak_reference(_pthread_resume_all_np, pthread_resume_all_np);
46 /* Resume a thread: */
48 _pthread_resume_np(pthread_t thread)
50 struct pthread *curthread = _get_curthread();
51 struct kse_mailbox *kmbx;
54 /* Add a reference to the thread: */
55 if ((ret = _thr_ref_add(curthread, thread, /*include dead*/0)) == 0) {
56 /* Lock the threads scheduling queue: */
57 THR_SCHED_LOCK(curthread, thread);
58 kmbx = resume_common(thread);
59 THR_SCHED_UNLOCK(curthread, thread);
60 _thr_ref_delete(curthread, thread);
68 _pthread_resume_all_np(void)
70 struct pthread *curthread = _get_curthread();
71 struct pthread *thread;
72 struct kse_mailbox *kmbx;
75 /* Take the thread list lock: */
76 crit = _kse_critical_enter();
77 KSE_LOCK_ACQUIRE(curthread->kse, &_thread_list_lock);
79 TAILQ_FOREACH(thread, &_thread_list, tle) {
80 if (thread != curthread) {
81 THR_SCHED_LOCK(curthread, thread);
82 kmbx = resume_common(thread);
83 THR_SCHED_UNLOCK(curthread, thread);
89 /* Release the thread list lock: */
90 KSE_LOCK_RELEASE(curthread->kse, &_thread_list_lock);
91 _kse_critical_leave(crit);
94 static struct kse_mailbox *
95 resume_common(struct pthread *thread)
97 /* Clear the suspend flag: */
98 thread->flags &= ~THR_FLAGS_SUSPENDED;
101 * If the thread's state is suspended, that means it is
102 * now runnable but not in any scheduling queue. Set the
103 * state to running and insert it into the run queue.
105 if (thread->state == PS_SUSPENDED)
106 return (_thr_setrunnable_unlocked(thread));