EventLoopIOManagerNull.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "CoreTypes.h"
#include "Async/ManualResetEvent.h"
#include "EventLoop/IEventLoop.h"
#include "EventLoop/IEventLoopIOManager.h"
#include "Misc/Timespan.h"
 
namespace UE::EventLoop {
 
class FIOAccessNull final : public FNoncopyable
{
public:
    // Nothing needed for now.
};
 
class FIOManagerNull final : public IIOManager
{
public:
    using FIOAccess = FIOAccessNull;
 
    struct FParams
    {
    };
 
    FIOManagerNull(IEventLoop& EventLoop, FParams&& Params)
    {
    }
 
    virtual ~FIOManagerNull() = default;
 
    virtual bool Init() override
    {
        return true;
    }
 
    virtual void Shutdown() override
    {
    }
 
    virtual void Notify() override
    {
        Event.Notify();
    }
 
    virtual void Poll(FTimespan WaitTime) override
    {
        Event.WaitFor(FMonotonicTimeSpan::FromSeconds(WaitTime.GetTotalSeconds()));
        Event.Reset();
    }
 
    FIOAccess& GetIOAccess()
    {
        return IOAccess;
    }
 
private:
    FIOAccess IOAccess;
    UE::FManualResetEvent Event;
};
 
/* UE::EventLoop */ }