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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by John Birrell. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $FreeBSD$ 33 */ 34 35 #include "namespace.h" 36 #include <errno.h> 37 #include <pthread.h> 38 #include <pthread_np.h> 39 #include "un-namespace.h" 40 41 #include "thr_private.h" 42 43 __weak_reference(_pthread_resume_np, pthread_resume_np); 44 __weak_reference(_pthread_resume_all_np, pthread_resume_all_np); 45 46 static void resume_common(struct pthread *thread); 47 48 /* Resume a thread: */ 49 int 50 _pthread_resume_np(pthread_t thread) 51 { 52 struct pthread *curthread = _get_curthread(); 53 int ret; 54 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_THREAD_LOCK(curthread, thread); 59 resume_common(thread); 60 THR_THREAD_UNLOCK(curthread, thread); 61 _thr_ref_delete(curthread, thread); 62 } 63 return (ret); 64 } 65 66 void 67 _pthread_resume_all_np(void) 68 { 69 struct pthread *curthread = _get_curthread(); 70 struct pthread *thread; 71 72 /* Take the thread list lock: */ 73 THREAD_LIST_LOCK(curthread); 74 75 TAILQ_FOREACH(thread, &_thread_list, tle) { 76 if (thread != curthread) { 77 THR_THREAD_LOCK(curthread, thread); 78 resume_common(thread); 79 THR_THREAD_UNLOCK(curthread, thread); 80 } 81 } 82 83 /* Release the thread list lock: */ 84 THREAD_LIST_UNLOCK(curthread); 85 } 86 87 static void 88 resume_common(struct pthread *thread) 89 { 90 /* Clear the suspend flag: */ 91 thread->flags &= ~THR_FLAGS_NEED_SUSPEND; 92 thread->cycle++; 93 _thr_umtx_wake(&thread->cycle, 1); 94 } 95