openshot-audio  0.1.2
juce_SpinLock.h
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1 /*
2  ==============================================================================
3 
4  This file is part of the juce_core module of the JUCE library.
5  Copyright (c) 2015 - ROLI Ltd.
6 
7  Permission to use, copy, modify, and/or distribute this software for any purpose with
8  or without fee is hereby granted, provided that the above copyright notice and this
9  permission notice appear in all copies.
10 
11  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
12  TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
13  NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
14  DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
15  IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
16  CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 
18  ------------------------------------------------------------------------------
19 
20  NOTE! This permissive ISC license applies ONLY to files within the juce_core module!
21  All other JUCE modules are covered by a dual GPL/commercial license, so if you are
22  using any other modules, be sure to check that you also comply with their license.
23 
24  For more details, visit www.juce.com
25 
26  ==============================================================================
27 */
28 
29 #ifndef JUCE_SPINLOCK_H_INCLUDED
30 #define JUCE_SPINLOCK_H_INCLUDED
31 
32 
33 //==============================================================================
47 {
48 public:
49  inline SpinLock() noexcept {}
50  inline ~SpinLock() noexcept {}
51 
61  void enter() const noexcept;
62 
64  inline bool tryEnter() const noexcept
65  {
66  return lock.compareAndSetBool (1, 0);
67  }
68 
70  inline void exit() const noexcept
71  {
72  jassert (lock.value == 1); // Agh! Releasing a lock that isn't currently held!
73  lock = 0;
74  }
75 
76  //==============================================================================
79 
82 
83 private:
84  //==============================================================================
85  mutable Atomic<int> lock;
86 
88 };
89 
90 
91 #endif // JUCE_SPINLOCK_H_INCLUDED
#define noexcept
Definition: juce_CompilerSupport.h:141
Definition: juce_Atomic.h:41
void exit() const noexcept
Definition: juce_SpinLock.h:70
Definition: juce_ScopedLock.h:59
Definition: juce_ScopedLock.h:128
GenericScopedUnlock< SpinLock > ScopedUnlockType
Definition: juce_SpinLock.h:81
Definition: juce_SpinLock.h:46
bool tryEnter() const noexcept
Definition: juce_SpinLock.h:64
#define JUCE_API
Definition: juce_StandardHeader.h:139
~SpinLock() noexcept
Definition: juce_SpinLock.h:50
#define const
GenericScopedLock< SpinLock > ScopedLockType
Definition: juce_SpinLock.h:78
SpinLock() noexcept
Definition: juce_SpinLock.h:49
#define jassert(a)
Definition: juce_PlatformDefs.h:146
#define JUCE_DECLARE_NON_COPYABLE(className)
Definition: juce_PlatformDefs.h:191