FRWAccessDetector | Unreal Engine 5.7 Documentation

API > API/Runtime > API/Runtime/Core

Read write multithread access detector, will check on concurrent write/write and read/write access, but will not on concurrent read access. Note this detector is not re-entrant, see FRWRecursiveAccessDetector and FRWFullyRecursiveAccessDetector. But FRWAccessDetector should be the default one to start with.


Name	FRWAccessDetector
Type	struct
Header File	/Engine/Source/Runtime/Core/Public/Misc/MTAccessDetector.h
Include Path	#include "Misc/MTAccessDetector.h"

Syntax

struct FRWAccessDetector

Derived Classes

Constructors

Name	Remarks	Include Path	Unreal Specifiers
FRWAccessDetector ()		Misc/MTAccessDetector.h
FRWAccessDetector ( FRWAccessDetector&& Other )		Misc/MTAccessDetector.h
FRWAccessDetector ( const FRWAccessDetector& Other )		Misc/MTAccessDetector.h

Destructors

Name	Remarks	Include Path	Unreal Specifiers
~FRWAccessDetector()		Misc/MTAccessDetector.h

Constants

Name	Type	Remarks	Include Path
WriterBits	uint32	We need to do an atomic operation to know there are multiple writers, this is why we reserve more than one bit for them.	Misc/MTAccessDetector.h
WriterIncrementValue	uint32		Misc/MTAccessDetector.h

Functions

Public

Name	Remarks	Include Path
bool AcquireReadAccess()	Acquires read access, will check if there are any writers	Misc/MTAccessDetector.h
bool AcquireWriteAccess()	Acquires write access, will check if there are readers or other writers	Misc/MTAccessDetector.h
bool ReleaseReadAccess()	Releases read access, will check if there are any writers	Misc/MTAccessDetector.h
bool ReleaseWriteAccess()	Releases write access, will check if there are readers or other writers	Misc/MTAccessDetector.h
bool UpgradeReadAccessToWriteAccess()	Upgrades a previously taken `AcquireReadAccess_ to` AcquireWriteAccess_, and will check if there are other readers or writers	Misc/MTAccessDetector.h

Operators

Name	Remarks	Include Path	Unreal Specifiers
FRWAccessDetector & operator= ( FRWAccessDetector&& Other )		Misc/MTAccessDetector.h
FRWAccessDetector & operator= ( const FRWAccessDetector& Other )		Misc/MTAccessDetector.h

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