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 */ 30 31 #include "namespace.h" 32 #include <machine/tls.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 static void resume_common(pthread_t thread); 41 42 /* Resume a thread: */ 43 int 44 _pthread_resume_np(pthread_t thread) 45 { 46 pthread_t curthread = tls_get_curthread(); 47 int ret; 48 49 /* Add a reference to the thread: */ 50 if ((ret = _thr_ref_add(curthread, thread, /*include dead*/0)) == 0) { 51 /* Lock the threads scheduling queue: */ 52 THR_THREAD_LOCK(curthread, thread); 53 resume_common(thread); 54 THR_THREAD_UNLOCK(curthread, thread); 55 _thr_ref_delete(curthread, thread); 56 } 57 return (ret); 58 } 59 60 void 61 _pthread_resume_all_np(void) 62 { 63 pthread_t curthread = tls_get_curthread(); 64 pthread_t thread; 65 66 /* Take the thread list lock: */ 67 THREAD_LIST_LOCK(curthread); 68 69 TAILQ_FOREACH(thread, &_thread_list, tle) { 70 if (thread != curthread) { 71 THR_THREAD_LOCK(curthread, thread); 72 resume_common(thread); 73 THR_THREAD_UNLOCK(curthread, thread); 74 } 75 } 76 77 /* Release the thread list lock: */ 78 THREAD_LIST_UNLOCK(curthread); 79 } 80 81 static void 82 resume_common(pthread_t thread) 83 { 84 /* Clear the suspend flag: */ 85 thread->flags &= ~THR_FLAGS_NEED_SUSPEND; 86 thread->cycle++; 87 _thr_umtx_wake(&thread->cycle, 1); 88 } 89 90 __strong_reference(_pthread_resume_np, pthread_resume_np); 91 __strong_reference(_pthread_resume_all_np, pthread_resume_all_np); 92