RuntimeAssetCacheInterface.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/NameTypes.h"
#include "Delegates/Delegate.h"
#include "UObject/ObjectMacros.h"
#include "UObject/WeakObjectPtr.h"
#include "UObject/Object.h"
#include "RuntimeAssetCacheInterface.generated.h"
 
class IRuntimeAssetCacheBuilder;
 
class IRuntimeAssetCacheBuilder;
 
USTRUCT(BlueprintType)
struct FVoidPtrParam
{
    GENERATED_BODY()
 
    FVoidPtrParam(void* InData, int64 InDataSize)
    : Data(InData)
    , DataSize(InDataSize)
    { }
 
    FVoidPtrParam()
        : Data(nullptr)
        , DataSize(0)
    { }
 
    static FVoidPtrParam NullPtr()
    {
        return FVoidPtrParam();
    }
 
    inline bool operator!() const
    {
        return (!Data || DataSize <= 0);
    }
 
    inline explicit operator bool() const
    {
        return (Data && DataSize > 0);
    }
 
    void* Data;
    int64 DataSize;
};
 
 
DECLARE_DYNAMIC_DELEGATE_TwoParams(FOnRuntimeAssetCacheAsyncComplete, int32, Handle, FVoidPtrParam, Data);
 
class FRuntimeAssetCacheInterface
{
public:
    virtual ~FRuntimeAssetCacheInterface() { }
 
    virtual FVoidPtrParam GetSynchronous(IRuntimeAssetCacheBuilder* CacheBuilder) = 0;
 
    virtual int32 GetAsynchronous(IRuntimeAssetCacheBuilder* CacheBuilder, const FOnRuntimeAssetCacheAsyncComplete& OnCompletionDelegate) = 0;
 
    virtual int32 GetAsynchronous(IRuntimeAssetCacheBuilder* CacheBuilder) = 0;
 
    virtual int32 GetCacheSize(FName Bucket) const = 0;
 
    virtual bool ClearCache() = 0;
 
    virtual bool ClearCache(FName Bucket) = 0;
 
    virtual void WaitAsynchronousCompletion(int32 Handle) = 0;
 
    virtual FVoidPtrParam GetAsynchronousResults(int32 Handle) = 0;
 
    virtual bool PollAsynchronousCompletion(int32 Handle) = 0;
 
    virtual void AddToAsyncCompletionCounter(int32 Addend) = 0;
 
    virtual void Tick() = 0;
};