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
32 #include "namespace.h"
35 #include "un-namespace.h"
36 #include "thr_private.h"
38 int _pthread_resume_np(pthread_t thread);
39 void _pthread_resume_all_np(void);
41 static struct kse_mailbox *resume_common(struct pthread *);
43 __weak_reference(_pthread_resume_np, pthread_resume_np);
44 __weak_reference(_pthread_resume_all_np, pthread_resume_all_np);
47 /* Resume a thread: */
49 _pthread_resume_np(pthread_t thread)
51 struct pthread *curthread = _get_curthread();
52 struct kse_mailbox *kmbx;
55 /* Add a reference to the thread: */
56 if ((ret = _thr_ref_add(curthread, thread, /*include dead*/0)) == 0) {
57 /* Lock the threads scheduling queue: */
58 THR_SCHED_LOCK(curthread, thread);
59 kmbx = resume_common(thread);
60 THR_SCHED_UNLOCK(curthread, thread);
61 _thr_ref_delete(curthread, thread);
69 _pthread_resume_all_np(void)
71 struct pthread *curthread = _get_curthread();
72 struct pthread *thread;
73 struct kse_mailbox *kmbx;
76 /* Take the thread list lock: */
77 crit = _kse_critical_enter();
78 KSE_LOCK_ACQUIRE(curthread->kse, &_thread_list_lock);
80 TAILQ_FOREACH(thread, &_thread_list, tle) {
81 if (thread != curthread) {
82 THR_SCHED_LOCK(curthread, thread);
83 kmbx = resume_common(thread);
84 THR_SCHED_UNLOCK(curthread, thread);
90 /* Release the thread list lock: */
91 KSE_LOCK_RELEASE(curthread->kse, &_thread_list_lock);
92 _kse_critical_leave(crit);
95 static struct kse_mailbox *
96 resume_common(struct pthread *thread)
98 /* Clear the suspend flag: */
99 thread->flags &= ~THR_FLAGS_SUSPENDED;
102 * If the thread's state is suspended, that means it is
103 * now runnable but not in any scheduling queue. Set the
104 * state to running and insert it into the run queue.
106 if (thread->state == PS_SUSPENDED)
107 return (_thr_setrunnable_unlocked(thread));