AsyncLoadingFlushContext.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Ticker.h"
#include "Containers/UnrealString.h"
#include "Delegates/Delegate.h"
#include "HAL/Platform.h"
#include "Logging/LogMacros.h"
#include "Templates/UnrealTemplate.h"
 
DECLARE_LOG_CATEGORY_EXTERN(AsyncLoadingFlush, Log, All);
 
DECLARE_DELEGATE(FOnAsyncLoadingFlushComplete);
 
class FAsyncLoadingFlushContext final : FNoncopyable
{
public:
    COREUOBJECT_API FAsyncLoadingFlushContext(const FString & Context);
    COREUOBJECT_API FAsyncLoadingFlushContext(FString&& Context);
    COREUOBJECT_API ~FAsyncLoadingFlushContext();
 
    COREUOBJECT_API void Flush(const FOnAsyncLoadingFlushComplete& OnFlushComplete);
 
    int32 GetId() const { return Id; }
 
private:
    FAsyncLoadingFlushContext() = delete;
 
    void CleanupTickers();
 
    bool OnAsyncLoadingCheck(float DeltaTime);
    bool OnAsyncLoadingWarn(float DeltaTime);
 
    static constexpr float LoadingFlushWarnIntervalSeconds = 10.f;
 
    FString Context;
 
    int32 Id;
 
    FOnAsyncLoadingFlushComplete OnFlushCompleteDelegate;
 
    double StartTime = 0;
 
    FTSTicker::FDelegateHandle LoadingCompleteCheckDelegateHandle;
    FTSTicker::FDelegateHandle WaitingWarnDelegateHandle;
 
    static COREUOBJECT_API int32 NextId;
};