1 /* 2 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 16 * 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 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #include "namespace.h" 33 #include <errno.h> 34 #include <pthread.h> 35 #include <pthread_np.h> 36 #include "un-namespace.h" 37 38 #include "thr_private.h" 39 40 __weak_reference(_pthread_resume_np, pthread_resume_np); 41 __weak_reference(_pthread_resume_all_np, pthread_resume_all_np); 42 43 static void resume_common(struct pthread *thread); 44 45 /* Resume a thread: */ 46 int 47 _pthread_resume_np(pthread_t thread) 48 { 49 struct pthread *curthread = _get_curthread(); 50 int ret; 51 52 /* Add a reference to the thread: */ 53 if ((ret = _thr_ref_add(curthread, thread, /*include dead*/0)) == 0) { 54 /* Lock the threads scheduling queue: */ 55 THR_THREAD_LOCK(curthread, thread); 56 resume_common(thread); 57 THR_THREAD_UNLOCK(curthread, thread); 58 _thr_ref_delete(curthread, thread); 59 } 60 return (ret); 61 } 62 63 void 64 _pthread_resume_all_np(void) 65 { 66 struct pthread *curthread = _get_curthread(); 67 struct pthread *thread; 68 69 /* Take the thread list lock: */ 70 THREAD_LIST_LOCK(curthread); 71 72 TAILQ_FOREACH(thread, &_thread_list, tle) { 73 if (thread != curthread) { 74 THR_THREAD_LOCK(curthread, thread); 75 resume_common(thread); 76 THR_THREAD_UNLOCK(curthread, thread); 77 } 78 } 79 80 /* Release the thread list lock: */ 81 THREAD_LIST_UNLOCK(curthread); 82 } 83 84 static void 85 resume_common(struct pthread *thread) 86 { 87 /* Clear the suspend flag: */ 88 thread->flags &= ~THR_FLAGS_NEED_SUSPEND; 89 thread->cycle++; 90 _thr_umtx_wake(&thread->cycle, 1); 91 } 92