OpenShot Library | OpenShotAudio  0.2.2
juce_WaitableEvent.cpp
1 /*
2  ==============================================================================
3 
4  This file is part of the JUCE library.
5  Copyright (c) 2017 - ROLI Ltd.
6 
7  JUCE is an open source library subject to commercial or open-source
8  licensing.
9 
10  The code included in this file is provided under the terms of the ISC license
11  http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12  To use, copy, modify, and/or distribute this software for any purpose with or
13  without fee is hereby granted provided that the above copyright notice and
14  this permission notice appear in all copies.
15 
16  JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17  EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18  DISCLAIMED.
19 
20  ==============================================================================
21 */
22 
23 namespace juce
24 {
25 
26 WaitableEvent::WaitableEvent (bool manualReset) noexcept
27  : useManualReset (manualReset)
28 {
29 }
30 
31 bool WaitableEvent::wait (int timeOutMilliseconds) const
32 {
33  std::unique_lock<std::mutex> lock (mutex);
34 
35  if (! triggered)
36  {
37  if (timeOutMilliseconds < 0)
38  {
39  condition.wait (lock, [this] { return triggered == true; });
40  }
41  else
42  {
43  if (! condition.wait_for (lock, std::chrono::milliseconds (timeOutMilliseconds),
44  [this] { return triggered == true; }))
45  {
46  return false;
47  }
48  }
49  }
50 
51  if (! useManualReset)
52  reset();
53 
54  return true;
55 }
56 
58 {
59  std::unique_lock<std::mutex> lock (mutex);
60 
61  triggered = true;
62  condition.notify_all();
63 }
64 
66 {
67  triggered = false;
68 }
69 
70 } // namespace juce
WaitableEvent(bool manualReset=false) noexcept
Creates a WaitableEvent object.
bool wait(int timeOutMilliseconds=-1) const
Suspends the calling thread until the event has been signalled.
void signal() const
Wakes up any threads that are currently waiting on this object.
void reset() const
Resets the event to an unsignalled state.