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