1f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch/* 2f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * libjingle 3f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * Copyright 2004--2008, Google Inc. 4f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 5f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * Redistribution and use in source and binary forms, with or without 6f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * modification, are permitted provided that the following conditions are met: 7f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 8f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 1. Redistributions of source code must retain the above copyright notice, 9f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * this list of conditions and the following disclaimer. 10f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 2. Redistributions in binary form must reproduce the above copyright notice, 11f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * this list of conditions and the following disclaimer in the documentation 12f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * and/or other materials provided with the distribution. 13f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 3. The name of the author may not be used to endorse or promote products 14f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * derived from this software without specific prior written permission. 15f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 16f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch */ 27f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 28f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#include "talk/base/event.h" 29f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 30f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#if defined(WIN32) 31f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#include <windows.h> 32f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#elif defined(POSIX) 33f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#include <pthread.h> 34f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#include <sys/time.h> 35f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#include <time.h> 36f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#else 37f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#error "Must define either WIN32 or POSIX." 38f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#endif 39f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 40f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochnamespace talk_base { 41f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 42f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#if defined(WIN32) 43f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 44f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen MurdochEvent::Event(bool manual_reset, bool initially_signaled) 45f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch : is_manual_reset_(manual_reset), 46f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch is_initially_signaled_(initially_signaled), 47f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_handle_(NULL) { 48f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 49f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 50f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochbool Event::EnsureInitialized() { 51f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (event_handle_ == NULL) { 52f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_handle_ = ::CreateEvent(NULL, // Security attributes. 53f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch is_manual_reset_, 54f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch is_initially_signaled_, 55f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch NULL); // Name. 56f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch } 57f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 58f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return (event_handle_ != NULL); 59f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 60f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 61f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen MurdochEvent::~Event() { 62f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (event_handle_ != NULL) { 63f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch CloseHandle(event_handle_); 64f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_handle_ = NULL; 65f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch } 66f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 67f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 68f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochbool Event::Set() { 69f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (!EnsureInitialized()) 70f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return false; 71f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 72f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch SetEvent(event_handle_); 73f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return true; 74f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 75f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 76f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochbool Event::Reset() { 77f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (!EnsureInitialized()) 78f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return false; 79f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 80f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch ResetEvent(event_handle_); 81f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return true; 82f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 83f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 84f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochbool Event::Wait(int cms) { 85f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch DWORD ms = (cms == kForever)? INFINITE : cms; 86f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 87f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (!EnsureInitialized()) 88f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return false; 89f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch else 90f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return (WaitForSingleObject(event_handle_, ms) == WAIT_OBJECT_0); 91f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 92f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 93f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#elif defined(POSIX) 94f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 95f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen MurdochEvent::Event(bool manual_reset, bool initially_signaled) 96f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch : is_manual_reset_(manual_reset), 97f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_status_(initially_signaled), 98f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_mutex_initialized_(false), 99f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_cond_initialized_(false) { 100f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 101f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 102f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochbool Event::EnsureInitialized() { 103f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (!event_mutex_initialized_) { 104f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (pthread_mutex_init(&event_mutex_, NULL) == 0) 105f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_mutex_initialized_ = true; 106f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch } 107f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 108f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (!event_cond_initialized_) { 109f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (pthread_cond_init(&event_cond_, NULL) == 0) 110f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_cond_initialized_ = true; 111f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch } 112f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 113f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return (event_mutex_initialized_ && event_cond_initialized_); 114f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 115f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 116f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen MurdochEvent::~Event() { 117f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (event_mutex_initialized_) { 118f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch pthread_mutex_destroy(&event_mutex_); 119f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_mutex_initialized_ = false; 120f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch } 121f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 122f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (event_cond_initialized_) { 123f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch pthread_cond_destroy(&event_cond_); 124f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_cond_initialized_ = false; 125f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch } 126f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 127f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 128f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochbool Event::Set() { 129f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (!EnsureInitialized()) 130f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return false; 131f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 132f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch pthread_mutex_lock(&event_mutex_); 133f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_status_ = true; 134f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch pthread_cond_broadcast(&event_cond_); 135f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch pthread_mutex_unlock(&event_mutex_); 136f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return true; 137f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 138f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 139f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochbool Event::Reset() { 140f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (!EnsureInitialized()) 141f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return false; 142f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 143f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch pthread_mutex_lock(&event_mutex_); 144f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_status_ = false; 145f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch pthread_mutex_unlock(&event_mutex_); 146f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return true; 147f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 148f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 149f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochbool Event::Wait(int cms) { 150f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (!EnsureInitialized()) 151f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return false; 152f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 153f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch pthread_mutex_lock(&event_mutex_); 154f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch int error = 0; 155f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 156f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (cms != kForever) { 157f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch // Converting from seconds and microseconds (1e-6) plus 158f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch // milliseconds (1e-3) to seconds and nanoseconds (1e-9). 159f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 160f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch struct timeval tv; 161f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch gettimeofday(&tv, NULL); 162f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 163f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch struct timespec ts; 164f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch ts.tv_sec = tv.tv_sec + (cms / 1000); 165f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch ts.tv_nsec = tv.tv_usec * 1000 + (cms % 1000) * 1000000; 166f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 167f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch // Handle overflow. 168f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (ts.tv_nsec >= 1000000000) { 169f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch ts.tv_sec++; 170f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch ts.tv_nsec -= 1000000000; 171f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch } 172f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 173f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch while (!event_status_ && error == 0) 174f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch error = pthread_cond_timedwait(&event_cond_, &event_mutex_, &ts); 175f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch } else { 176f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch while (!event_status_ && error == 0) 177f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch error = pthread_cond_wait(&event_cond_, &event_mutex_); 178f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch } 179f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 180f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch // NOTE(liulk): Exactly one thread will auto-reset this event. All 181f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch // the other threads will think it's unsignaled. This seems to be 182f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch // consistent with auto-reset events in WIN32. 183f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch if (error == 0 && !is_manual_reset_) 184f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch event_status_ = false; 185f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 186f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch pthread_mutex_unlock(&event_mutex_); 187f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 188f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return (error == 0); 189f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 190f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 191f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#endif 192f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 193f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} // namespace talk_base 194