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 "event_win.h"
12
13 #include "Mmsystem.h"
14
15 namespace webrtc {
EventWindows()16 EventWindows::EventWindows()
17 : _event(::CreateEvent(NULL /* security attributes */,
18 FALSE /* manual reset */,
19 FALSE /* initial state */,
20 NULL /* name of event */)),
21 _timerID(NULL)
22 {
23 }
24
~EventWindows()25 EventWindows::~EventWindows()
26 {
27 CloseHandle(_event);
28 }
29
Set()30 bool EventWindows::Set()
31 {
32 // Note: setting an event that is already set has no effect.
33 return SetEvent(_event) == 1 ? true : false;
34 }
35
Reset()36 bool EventWindows::Reset()
37 {
38 return ResetEvent(_event) == 1 ? true : false;
39 }
40
Wait(unsigned long maxTime)41 EventTypeWrapper EventWindows::Wait(unsigned long maxTime)
42 {
43 unsigned long res = WaitForSingleObject(_event, maxTime);
44 switch(res)
45 {
46 case WAIT_OBJECT_0:
47 return kEventSignaled;
48 case WAIT_TIMEOUT:
49 return kEventTimeout;
50 default:
51 return kEventError;
52 }
53 }
54
StartTimer(bool periodic,unsigned long time)55 bool EventWindows::StartTimer(bool periodic, unsigned long time)
56 {
57 if (_timerID != NULL)
58 {
59 timeKillEvent(_timerID);
60 _timerID=NULL;
61 }
62 if (periodic)
63 {
64 _timerID=timeSetEvent(time, 0,(LPTIMECALLBACK)HANDLE(_event),0,
65 TIME_PERIODIC|TIME_CALLBACK_EVENT_PULSE);
66 } else {
67 _timerID=timeSetEvent(time, 0,(LPTIMECALLBACK)HANDLE(_event),0,
68 TIME_ONESHOT|TIME_CALLBACK_EVENT_SET);
69 }
70
71 if (_timerID == NULL)
72 {
73 return false;
74 }
75 return true;
76 }
77
StopTimer()78 bool EventWindows::StopTimer()
79 {
80 timeKillEvent(_timerID);
81 _timerID = NULL;
82 return true;
83 }
84 } // namespace webrtc
85