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