Module once

🔬This is a nightly-only experimental API. (sync_poison_mod #134646)

A “once initialization” primitive

This primitive is meant to be used to run one-time initialization. An example use case would be for initializing an FFI library.

Structs

OnceExperimental

A low-level synchronization primitive for one-time global execution.

OnceStateExperimental

State yielded to Once::call_once_force()’s closure parameter. The state can be used to query the poison status of the Once.

Enums

ExclusiveState 🔒 Experimental

Constants

ONCE_INITDeprecatedExperimental

Initialization value for static Once values.