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100 lines
2 KiB
C++
100 lines
2 KiB
C++
/*
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* AudioCriticalSection.h
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* ---------
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* Purpose: Implementation of OpenMPT's critical section for access to CSoundFile.
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* Notes : (currently none)
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* Authors: OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#pragma once
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#include "openmpt/all/BuildSettings.hpp"
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#if defined(MODPLUG_TRACKER)
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#include "../misc/mptMutex.h"
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#endif
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OPENMPT_NAMESPACE_BEGIN
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#if defined(MODPLUG_TRACKER)
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namespace mpt {
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class recursive_mutex_with_lock_count;
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} // namespace mpt
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namespace Tracker { // implemented in mptrack/Mptrack.cpp
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mpt::recursive_mutex_with_lock_count & GetGlobalMutexRef();
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} // namespace Tracker
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// Critical section handling done in (safe) RAII style.
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// Create a CriticalSection object whenever you need exclusive access to CSoundFile.
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// One object = one lock / critical section.
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// The critical section is automatically left when the object is destroyed, but
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// Enter() and Leave() can also be called manually if needed.
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class CriticalSection
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{
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private:
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mpt::recursive_mutex_with_lock_count & m_refGlobalMutex;
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protected:
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bool inSection;
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public:
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enum class InitialState
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{
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Locked = 0,
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Unlocked = 1,
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};
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public:
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#if MPT_COMPILER_MSVC
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_Acquires_lock_(m_refGlobalMutex.mutex)
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#endif // MPT_COMPILER_MSVC
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CriticalSection();
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CriticalSection(CriticalSection &&other) noexcept;
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explicit CriticalSection(InitialState state);
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#if MPT_COMPILER_MSVC
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_Acquires_lock_(m_refGlobalMutex.mutex)
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#endif // MPT_COMPILER_MSVC
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void Enter();
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#if MPT_COMPILER_MSVC
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_Requires_lock_held_(m_refGlobalMutex.mutex) _Releases_lock_(m_refGlobalMutex.mutex)
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#endif // MPT_COMPILER_MSVC
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void Leave();
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~CriticalSection();
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};
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#else // !MODPLUG_TRACKER
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class CriticalSection
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{
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public:
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enum class InitialState
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{
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Locked = 0,
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Unlocked = 1,
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};
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public:
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CriticalSection() {}
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CriticalSection(CriticalSection &&) noexcept {}
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explicit CriticalSection(InitialState) {}
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void Enter() {}
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void Leave() {}
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~CriticalSection() {}
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};
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#endif // MODPLUG_TRACKER
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OPENMPT_NAMESPACE_END
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