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/*
* mptMutex.h
* ----------
* Purpose: Partially implement c++ mutexes as far as openmpt needs them. Can eventually go away when we only support c++11 compilers some time.
* 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"
#include "mpt/mutex/mutex.hpp"
OPENMPT_NAMESPACE_BEGIN
namespace mpt {
class recursive_mutex_with_lock_count {
private:
mpt::recursive_mutex mutex;
#if MPT_COMPILER_MSVC
_Guarded_by_(mutex)
#endif // MPT_COMPILER_MSVC
long lockCount;
public:
recursive_mutex_with_lock_count()
: lockCount(0)
{
return;
}
~recursive_mutex_with_lock_count()
{
return;
}
#if MPT_COMPILER_MSVC
_Acquires_lock_(mutex)
#endif // MPT_COMPILER_MSVC
void lock()
{
mutex.lock();
lockCount++;
}
#if MPT_COMPILER_MSVC
_Requires_lock_held_(mutex) _Releases_lock_(mutex)
#endif // MPT_COMPILER_MSVC
void unlock()
{
lockCount--;
mutex.unlock();
}
public:
bool IsLockedByCurrentThread() // DEBUGGING only
{
bool islocked = false;
if(mutex.try_lock())
{
islocked = (lockCount > 0);
mutex.unlock();
}
return islocked;
}
};
} // namespace mpt
OPENMPT_NAMESPACE_END
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