IRequestOwner

A request owner manages requests throughout their execution.

Unreal Engine C++ API Reference > Developer > DerivedDataCache

References

   
Module DerivedDataCache
Header /Engine/Source/Developer/DerivedDataCache/Public/DerivedDataRequestOwner.h
Include #include "DerivedDataRequestOwner.h"

Syntax

class IRequestOwner  

Remarks

A request owner manages requests throughout their execution.

Requests are expected to call Begin when created, and End when finished, with their completion callback and arguments passed to End when possible. If a request needs to invoke more than one callback, have a request barrier in scope when executing callbacks to ensure that new requests are prioritized properly when the priority is being changed from another thread.

The owner is responsible for keeping itself alive while it has active requests or barriers.

Functions

Type Name Description
void Begin ( IRequest* Request ) Begin tracking for the request.
void BeginBarrier ( ERequestBarrierFlags Flags ) See FRequestBarrier.
TRefCountPtr... End ( IRequest* Request ) End tracking for the request.
TRefCountPtr... End ( IRequest* Request, CallbackType&& Callback, CallbackArgTypes&&... CallbackArgs ) End tracking of the request.
void EndBarrier ( ERequestBarrierFlags Flags )  
EPriority GetPriority () Returns the priority that new requests are expected to inherit.
bool IsCanceled () Returns whether the owner has been canceled, which new requests are expected to check.
void LaunchTask ( const TCHAR* DebugName, TUniqueFunction< void()>&& TaskBod... ) Launches a task that executes the task body when scheduled.

See Also

FRequestBarrier

FRequestOwner


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