| OLD | NEW |
|---|
| (Empty) |
| 1 /* | |
| 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include "webrtc/base/event.h" | |
| 12 | |
| 13 #if defined(WEBRTC_WIN) | |
| 14 #include <windows.h> | |
| 15 #elif defined(WEBRTC_POSIX) | |
| 16 #include <pthread.h> | |
| 17 #include <sys/time.h> | |
| 18 #include <time.h> | |
| 19 #else | |
| 20 #error "Must define either WEBRTC_WIN or WEBRTC_POSIX." | |
| 21 #endif | |
| 22 | |
| 23 #include "webrtc/base/checks.h" | |
| 24 | |
| 25 namespace rtc { | |
| 26 | |
| 27 #if defined(WEBRTC_WIN) | |
| 28 | |
| 29 Event::Event(bool manual_reset, bool initially_signaled) { | |
| 30 event_handle_ = ::CreateEvent(nullptr, // Security attributes. | |
| 31 manual_reset, initially_signaled, | |
| 32 nullptr); // Name. | |
| 33 RTC_CHECK(event_handle_); | |
| 34 } | |
| 35 | |
| 36 Event::~Event() { | |
| 37 CloseHandle(event_handle_); | |
| 38 } | |
| 39 | |
| 40 void Event::Set() { | |
| 41 SetEvent(event_handle_); | |
| 42 } | |
| 43 | |
| 44 void Event::Reset() { | |
| 45 ResetEvent(event_handle_); | |
| 46 } | |
| 47 | |
| 48 bool Event::Wait(int milliseconds) { | |
| 49 DWORD ms = (milliseconds == kForever) ? INFINITE : milliseconds; | |
| 50 return (WaitForSingleObject(event_handle_, ms) == WAIT_OBJECT_0); | |
| 51 } | |
| 52 | |
| 53 #elif defined(WEBRTC_POSIX) | |
| 54 | |
| 55 Event::Event(bool manual_reset, bool initially_signaled) | |
| 56 : is_manual_reset_(manual_reset), | |
| 57 event_status_(initially_signaled) { | |
| 58 RTC_CHECK(pthread_mutex_init(&event_mutex_, nullptr) == 0); | |
| 59 RTC_CHECK(pthread_cond_init(&event_cond_, nullptr) == 0); | |
| 60 } | |
| 61 | |
| 62 Event::~Event() { | |
| 63 pthread_mutex_destroy(&event_mutex_); | |
| 64 pthread_cond_destroy(&event_cond_); | |
| 65 } | |
| 66 | |
| 67 void Event::Set() { | |
| 68 pthread_mutex_lock(&event_mutex_); | |
| 69 event_status_ = true; | |
| 70 pthread_cond_broadcast(&event_cond_); | |
| 71 pthread_mutex_unlock(&event_mutex_); | |
| 72 } | |
| 73 | |
| 74 void Event::Reset() { | |
| 75 pthread_mutex_lock(&event_mutex_); | |
| 76 event_status_ = false; | |
| 77 pthread_mutex_unlock(&event_mutex_); | |
| 78 } | |
| 79 | |
| 80 bool Event::Wait(int milliseconds) { | |
| 81 int error = 0; | |
| 82 | |
| 83 struct timespec ts; | |
| 84 if (milliseconds != kForever) { | |
| 85 // Converting from seconds and microseconds (1e-6) plus | |
| 86 // milliseconds (1e-3) to seconds and nanoseconds (1e-9). | |
| 87 | |
| 88 #ifdef HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE | |
| 89 // Use relative time version, which tends to be more efficient for | |
| 90 // pthread implementations where provided (like on Android). | |
| 91 ts.tv_sec = milliseconds / 1000; | |
| 92 ts.tv_nsec = (milliseconds % 1000) * 1000000; | |
| 93 #else | |
| 94 struct timeval tv; | |
| 95 gettimeofday(&tv, nullptr); | |
| 96 | |
| 97 ts.tv_sec = tv.tv_sec + (milliseconds / 1000); | |
| 98 ts.tv_nsec = tv.tv_usec * 1000 + (milliseconds % 1000) * 1000000; | |
| 99 | |
| 100 // Handle overflow. | |
| 101 if (ts.tv_nsec >= 1000000000) { | |
| 102 ts.tv_sec++; | |
| 103 ts.tv_nsec -= 1000000000; | |
| 104 } | |
| 105 #endif | |
| 106 } | |
| 107 | |
| 108 pthread_mutex_lock(&event_mutex_); | |
| 109 if (milliseconds != kForever) { | |
| 110 while (!event_status_ && error == 0) { | |
| 111 #ifdef HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE | |
| 112 error = pthread_cond_timedwait_relative_np( | |
| 113 &event_cond_, &event_mutex_, &ts); | |
| 114 #else | |
| 115 error = pthread_cond_timedwait(&event_cond_, &event_mutex_, &ts); | |
| 116 #endif | |
| 117 } | |
| 118 } else { | |
| 119 while (!event_status_ && error == 0) | |
| 120 error = pthread_cond_wait(&event_cond_, &event_mutex_); | |
| 121 } | |
| 122 | |
| 123 // NOTE(liulk): Exactly one thread will auto-reset this event. All | |
| 124 // the other threads will think it's unsignaled. This seems to be | |
| 125 // consistent with auto-reset events in WEBRTC_WIN | |
| 126 if (error == 0 && !is_manual_reset_) | |
| 127 event_status_ = false; | |
| 128 | |
| 129 pthread_mutex_unlock(&event_mutex_); | |
| 130 | |
| 131 return (error == 0); | |
| 132 } | |
| 133 | |
| 134 #endif | |
| 135 | |
| 136 } // namespace rtc | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2877023002:
Move webrtc/{base => rtc_base} (Closed)
