Enum std::sync::atomic::Ordering

pub enum Ordering {
    Relaxed,
    Release,
    Acquire,
    AcqRel,
    SeqCst,
}

Atomic memory orderings

Memory orderings limit the ways that both the compiler and CPU may reorder instructions around atomic operations. At its most restrictive, "sequentially consistent" atomics allow neither reads nor writes to be moved either before or after the atomic operation; on the other end "relaxed" atomics allow all reorderings.

Rust's memory orderings are the same as LLVM's.

Variants

Relaxed	No ordering constraints, only atomic operations. Corresponds to LLVM's Monotonic ordering.
Release	When coupled with a store, all previous writes become visible to another thread that performs a load with Acquire ordering on the same value.
Acquire	When coupled with a load, all subsequent loads will see data written before a store with Release ordering on the same value in another thread.
AcqRel	When coupled with a load, uses Acquire ordering, and with a store Release ordering.
SeqCst	Like AcqRel with the additional guarantee that all threads see all sequentially consistent operations in the same order.

Trait Implementations

Derived Implementations

impl Clone for Ordering

fn clone(&self) -> Ordering

fn clone_from(&mut self, source: &Self)

impl Copy for Ordering