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  3. IRequestOwner

IRequestOwner

A request owner manages requests throughout their execution.

API > API/Developer > API/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
Public function void

Begin ( IRequest* Request
)

 Begin tracking for the request.
Public function UE_INTERNAL void

BeginBarrier ( const FRequestBarrier& Barrier
)

 See FRequestBarrier.
Public function TRefCountPtr< IRequest >

End ( IRequest* Request
)

 End tracking for the request.
Public function TRefCountPtr< IRequest >

End ( IRequest* Request,
CallbackType&& Callback,
CallbackArgTypes&&... CallbackArgs
)

 End tracking of the request.
Public function UE_INTERNAL void

EndBarrier ( const FRequestBarrier& Barrier
)

  
Public function Const EPriority Returns the priority that new requests are expected to inherit.
Public function Const bool Returns whether the owner has been canceled, which new requests are expected to check.
Public function void

LaunchTask ( const TCHAR* DebugName,
TUniqueFunction< void()>&& TaskBody
)

 Launches a task that executes the task body when scheduled.

See Also

FRequestBarrier

FRequestOwner

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