FArenaPointer

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Unreal Engine C++ API Reference > Runtime > Core > Memory

Inheritance Hierarchy

• FArenaPointer
• TArenaPointer

References

Syntax

class FArenaPointer  
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class FArenaPointer

Remarks

Tagged Arena Pointer

Stores an arena ID alongside a pointer. On 64-bit architectures the arena ID can be encoded in the otherwise unused MSB part of the pointer for zero memory overhead vs a regular pointer. For 32-bit architectures the arena ID is stored in a separate member.

A null pointer can still have an arena ID, which is useful for cases where you have a container that starts out empty but still want to track which arena should be used for subsequent allocations.

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