TSSAMAtomicHandle | Unreal Engine 5.8 Documentation

API > API/Runtime > API/Runtime/Engine

Storage wrapper for an SSAM handle field that may be mutated post-publication and observed concurrently from other threads. Packs the 8-byte handle into a std::atomic so loads/stores are guaranteed lock-free hardware-atomic on every UE-supported platform no torn reads, no C++ data-race UB. The handle table's generation check still provides the safety net for stale/recycled-slot scenarios; this wrapper just ensures the read of the handle itself is well-defined under the C++ memory model.

Value semantics: implicit conversion to/from the underlying handle, plus the same IsValid / IsStale / Reset surface as TSSAMHandle, so call sites that touched the plain handle continue to compile unchanged.


Name	TSSAMAtomicHandle
Type	struct
Header File	/Engine/Source/Runtime/Engine/Public/Streaming/SimpleStreamableAssetManagerHandle.h
Include Path	#include "Streaming/SimpleStreamableAssetManagerHandle.h"

Syntax

template<typename TagT>  
struct TSSAMAtomicHandle

Constructors

Name	Remarks	Include Path
TSSAMAtomicHandle ()		Streaming/SimpleStreamableAssetManagerHandle.h
TSSAMAtomicHandle ( const TSSAMAtomicHandle& )	A handle holder owns a single SSAM slot.	Streaming/SimpleStreamableAssetManagerHandle.h
TSSAMAtomicHandle ( TSSAMAtomicHandle&& Other )		Streaming/SimpleStreamableAssetManagerHandle.h

Typedefs

Name	Type	Remarks	Include Path
HandleT	TSSAMHandle< TagT >		Streaming/SimpleStreamableAssetManagerHandle.h

Constants

Name	Type	Remarks	Include Path
DefaultStorage	uint64	Packed: low 32 bits = SlotIndex, high 32 bits = Generation.	Streaming/SimpleStreamableAssetManagerHandle.h

Variables

Protected

Name	Type	Remarks	Include Path	Unreal Specifiers
Storage	std::atomic< uint64 >		Streaming/SimpleStreamableAssetManagerHandle.h

Functions

Public

Name	Remarks	Include Path	Unreal Specifiers
HandleT Exchange ( HandleT Desired, std::memory_order Order )		Streaming/SimpleStreamableAssetManagerHandle.h
bool IsStale()		Streaming/SimpleStreamableAssetManagerHandle.h
bool IsValid()		Streaming/SimpleStreamableAssetManagerHandle.h
HandleT Load ( std::memory_order Order ) const		Streaming/SimpleStreamableAssetManagerHandle.h
void Reset()		Streaming/SimpleStreamableAssetManagerHandle.h
void Store ( HandleT Handle, std::memory_order Order )		Streaming/SimpleStreamableAssetManagerHandle.h

Operators

Name	Remarks	Include Path	Unreal Specifiers
operator HandleT()		Streaming/SimpleStreamableAssetManagerHandle.h
bool operator!= ( HandleT Other ) const		Streaming/SimpleStreamableAssetManagerHandle.h
TSSAMAtomicHandle & operator= ( const TSSAMAtomicHandle& )		Streaming/SimpleStreamableAssetManagerHandle.h
TSSAMAtomicHandle & operator= ( TSSAMAtomicHandle&& Other )		Streaming/SimpleStreamableAssetManagerHandle.h
TSSAMAtomicHandle & operator= ( HandleT Handle )		Streaming/SimpleStreamableAssetManagerHandle.h
bool operator== ( HandleT Other ) const		Streaming/SimpleStreamableAssetManagerHandle.h

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