106 lines
2.2 KiB
C++
106 lines
2.2 KiB
C++
/***
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Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: Mutex.Win32.cpp
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Date: 2021-6-12
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Author: Reece
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***/
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#include <RuntimeInternal.hpp>
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#include "Mutex.Generic.hpp"
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#if !defined(_AURUNTIME_GENERICMUTEX)
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#include "Mutex.Win32.hpp"
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namespace Aurora::Threading::Primitives
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{
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Mutex::Mutex()
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{
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InitializeSRWLock(&atomicHolder_);
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InitializeConditionVariable(&wakeup_);
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state_ = 0;
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}
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Mutex::~Mutex()
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{
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}
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bool Mutex::HasOSHandle(AuMach &mach)
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{
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return false;
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}
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bool Mutex::TryLock()
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{
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return _interlockedbittestandset(&state_, 0) == 0;
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}
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bool Mutex::HasLockImplementation()
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{
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return true;
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}
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void Mutex::Lock()
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{
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auto status = Lock(0);
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SysAssert(status, "Couldn't lock Mutex object");
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}
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bool Mutex::Lock(AuUInt64 timeout)
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{
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bool returnValue = false;
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AcquireSRWLockShared(&atomicHolder_);
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AuInt64 startTime = Time::CurrentClockMS();
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AuInt64 endTime = startTime + timeout;
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BOOL status = false;
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while (!TryLock())
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{
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AuUInt32 timeoutMs = INFINITE;
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if (timeout != 0)
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{
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timeoutMs = endTime - static_cast<AuInt64>(Time::CurrentClockMS());
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if (timeoutMs < 0)
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{
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goto exitWin32;
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}
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}
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status = SleepConditionVariableSRW(&wakeup_, &atomicHolder_, endTime, CONDITION_VARIABLE_LOCKMODE_SHARED);
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if (!status)
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{
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SysAssertExp(GetLastError() == ERROR_TIMEOUT);
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goto exitWin32;
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}
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}
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exitWin32:
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returnValue = true;
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ReleaseSRWLockShared(&atomicHolder_);
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return returnValue;
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}
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void Mutex::Unlock()
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{
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AcquireSRWLockExclusive(&atomicHolder_);
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state_ = 0;
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ReleaseSRWLockExclusive(&atomicHolder_);
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WakeAllConditionVariable(&wakeup_);
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}
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AUKN_SYM IWaitable *MutexNew()
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{
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return _new Mutex();
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}
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AUKN_SYM void MutexRelease(IWaitable *waitable)
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{
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SafeDelete<Mutex *>(waitable);
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}
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}
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#endif |