OpenShot Audio Library | OpenShotAudio: juce_ReadWriteLock.h Source File

OpenShot Audio Library | OpenShotAudio 0.3.0

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juce_ReadWriteLock.h
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
23namespace juce
24{
25
26//==============================================================================
47 class JUCE_API ReadWriteLock
48{
49public:
50 //==============================================================================
54 ReadWriteLock() noexcept;
55
59 ~ReadWriteLock() noexcept;
60
61 //==============================================================================
69 void enterRead() const noexcept;
70
79 bool tryEnterRead() const noexcept;
80
91 void exitRead() const noexcept;
92
93 //==============================================================================
101 void enterWrite() const noexcept;
102
111 bool tryEnterWrite() const noexcept;
112
123 void exitWrite() const noexcept;
124
125
126private:
127 //==============================================================================
128 SpinLock accessLock;
129 WaitableEvent readWaitEvent, writeWaitEvent;
130 mutable int numWaitingWriters = 0, numWriters = 0;
131 mutable Thread::ThreadID writerThreadId = {};
132
133 struct ThreadRecursionCount
134 {
135 Thread::ThreadID threadID;
136 int count;
137 };
138
139 mutable Array <ThreadRecursionCount> readerThreads;
140
141 bool tryEnterWriteInternal (Thread::ThreadID) const noexcept;
142
143 JUCE_DECLARE_NON_COPYABLE (ReadWriteLock)
144};
145
146} // namespace juce
juce::ReadWriteLock
Definition: juce_ReadWriteLock.h:48
juce::SpinLock
Definition: juce_SpinLock.h:42
juce::Thread::ThreadID
void * ThreadID
Definition: juce_Thread.h:304
juce::WaitableEvent
Definition: juce_WaitableEvent.h:36