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FAsyncReadFileHandleNull

An [IAsyncReadFileHandle](API\Runtime\Core\Async\IAsyncReadFileHandle) that returns only failed results, used when a function has failed but needs to return a non-null [IAsyncReadFileHandle](API\Runtime\Core\Async\IAsyncReadFileHandle).

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Inheritance Hierarchy

IAsyncReadFileHandle

FAsyncReadFileHandleNull

References

Module	Core
Header	/Engine/Source/Runtime/Core/Public/Async/AsyncFileHandleNull.h
Include	#include "Async/AsyncFileHandleNull.h"

Syntax

class FAsyncReadFileHandleNull : public IAsyncReadFileHandle

Remarks

An IAsyncReadFileHandle that returns only failed results, used when a function has failed but needs to return a non-null IAsyncReadFileHandle.

Overridden from IAsyncReadFileHandle

	Name	Description
IAsyncReadRe...	ReadRequest ( int64 Offset, int64 BytesToRead, EAsyncIOPriorityAndFlags PriorityAn..., FAsyncFileCallBack* CompleteCa..., uint8* UserSuppliedMemory )	Submit an async request and/or wait for an async request
IAsyncReadRe...	SizeRequest ( FAsyncFileCallBack* CompleteCa... )	Request the size of the file. This is also essentially the existence check.
bool	UsesCache()	Return true if this file is backed by a cache, if not, then precache requests are ignored.