AuroraRuntime/Source/IO/AuIOSleep.Linux.cpp

/***
    Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: AuIOSleep.Linux.cpp
    Date: 2022-5-13
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "IO.hpp"
#include "AuIOSleep.Linux.hpp"
#include "UNIX/IOSubmit.Linux.hpp"

namespace Aurora::IO
{
    AUKN_SYM bool WaitFor(AuUInt32 dwMilliseconds, bool bWaitEntireFrame)
    {
        bool bHit {};
        AuUInt32 targetTime = dwMilliseconds ? AuTime::SteadyClockNS() + AuNSToMS<AuUInt64>(dwMilliseconds) : 0;
 
        if (!dwMilliseconds)
        {
            bWaitEntireFrame = false;
        }

        while (true)
        {
            AuUInt32 dwSleep;

            if (targetTime)
            {
                auto now = AuTime::SteadyClockNS();
                if (now >= targetTime)
                {
                    break;
                }

                dwSleep = AuNSToMS<AuUInt32>(now - targetTime);
            }
            else
            {
                dwSleep = 0;
            }

            if (!UNIX::LinuxOverlappedPoll(dwSleep))
            {
                continue;
            }

            bHit = true;
            
            if (!bWaitEntireFrame)
            {
                break;
            }
        }

        return bHit;
    }

    AUKN_SYM bool IOYield()
    {
        return UNIX::LinuxOverlappedYield();
    }
}