AuroraRuntime/Source/Threading/Primitives/AuMutex.Generic.cpp

/***
    Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: Mutex.Generic.cpp
    Date: 2021-6-12
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "AuMutex.Generic.hpp"

#if defined(_AURUNTIME_GENERICMUTEX)

namespace Aurora::Threading::Primitives
{
    MutexImpl::MutexImpl()
    {
        value_ = 0;
    }

    MutexImpl::~MutexImpl()
    {
        value_ = 0;
    }

    bool MutexImpl::HasOSHandle(AuMach &mach)
    {
        return false;
    }

    bool MutexImpl::TryLock()
    {
    #if defined(_AU_HAS_ATOMIC_INTRINS)
        return _interlockedbittestandset(&value_, 0) == 0;
    #else
        return value_.fetch_or(1);
    #endif 
    }

    bool MutexImpl::HasLockImplementation()
    {
        return false;
    }

    void MutexImpl::Lock()
    {
        auto status = Lock(0);
        SysAssert(status, "Couldn't lock Mutex object");
    }

    bool MutexImpl::Lock(AuUInt64 timeout)
    {
        SysAssertExp(!HasLockImplementation());
        return Aurora::Threading::WaitFor(this, timeout);
    }

    void MutexImpl::Unlock()
    {
        value_ = 0;
    }
    
    AUKN_SYM IWaitable *MutexNew()
    {
        return _new Mutex();
    }

    AUKN_SYM void MutexRelease(IWaitable *pMutex)
    {
        AuSafeDelete<Mutex *>(pMutex);
    }
}
#endif