1 /* 2 * Copyright (c) 2012 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/system_wrappers/source/event_win.h" 12 13 #include "Mmsystem.h" 14 15 namespace webrtc { 16 17 EventWindows::EventWindows() 18 : event_(::CreateEvent(NULL, // security attributes 19 FALSE, // manual reset 20 FALSE, // initial state 21 NULL)), // name of event 22 timerID_(NULL) { 23 } 24 25 EventWindows::~EventWindows() { 26 StopTimer(); 27 CloseHandle(event_); 28 } 29 30 bool EventWindows::Set() { 31 // Note: setting an event that is already set has no effect. 32 return SetEvent(event_) == 1; 33 } 34 35 bool EventWindows::Reset() { 36 return ResetEvent(event_) == 1; 37 } 38 39 EventTypeWrapper EventWindows::Wait(unsigned long max_time) { 40 unsigned long res = WaitForSingleObject(event_, max_time); 41 switch (res) { 42 case WAIT_OBJECT_0: 43 return kEventSignaled; 44 case WAIT_TIMEOUT: 45 return kEventTimeout; 46 default: 47 return kEventError; 48 } 49 } 50 51 bool EventWindows::StartTimer(bool periodic, unsigned long time) { 52 if (timerID_ != NULL) { 53 timeKillEvent(timerID_); 54 timerID_ = NULL; 55 } 56 57 if (periodic) { 58 timerID_ = timeSetEvent(time, 0, (LPTIMECALLBACK)HANDLE(event_), 0, 59 TIME_PERIODIC | TIME_CALLBACK_EVENT_PULSE); 60 } else { 61 timerID_ = timeSetEvent(time, 0, (LPTIMECALLBACK)HANDLE(event_), 0, 62 TIME_ONESHOT | TIME_CALLBACK_EVENT_SET); 63 } 64 65 return timerID_ != NULL; 66 } 67 68 bool EventWindows::StopTimer() { 69 if (timerID_ != NULL) { 70 timeKillEvent(timerID_); 71 timerID_ = NULL; 72 } 73 74 return true; 75 } 76 77 } // namespace webrtc 78
