AuroraRuntime/Source/IO/Loop/LSLocalEvent.hpp

/***
    Copyright (C) 2023 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: LSLocalEvent.hpp
    Date: 2023-10-21
    Author: Reece
***/
#pragma once

#include "LSSemaphore.hpp"

namespace Aurora::IO::Loop
{
    struct LSLocalEvent : LSSemaphore, ILSEvent
    {
        LSLocalEvent();
        ~LSLocalEvent();
    
        bool TryInit(bool bTriggered, bool bAtomicRelease, bool bPermitMultipleTriggers);

        virtual bool IsSignaled() override;
        ELoopSource GetType() override;

        bool Set() override;
        bool Reset() override;

        virtual bool OnTrigger(AuUInt handle) override;

        bool TryTakeNoSpin();
        bool TryTakeSpin();
        bool TryTake();
        bool TryTakeWaitNS(AuUInt64 timeout);
        
        PROXY_LOCAL_LOOPSOURCE_EXT_APIS_;
        
        bool IsSignaledNoSpinIfUserland() override;
        void OnPresleep() override;
        void OnFinishSleep() override;

        union EventBits
        {
            struct
            {
                AuUInt8 bAtomicRelease : 1;
                AuUInt8 bPermitMultipleTriggers : 1;
                AuUInt8 bTriggered : 1;
            };
            AuUInt32 state;
        };

        union
        {
            struct
            {
                AuUInt8 bAtomicRelease_ : 1;
                AuUInt8 bPermitMultipleTriggers_ : 1;
                AuUInt8 bTriggered_ : 1;
            };

            AuUInt32 state_;
        };

        AuUInt32 uApproxSleepCount {};
        AuUInt32 uLaterAlwaysOn {};
    };
}