Module atomic 

Atomic shim: loom::sync::atomic under permutation testing, otherwise core::sync::atomic — or, on a target with no native RMW atomics (see the atomics-polyfill feature), portable_atomic instead (plan.md §1.3).

The lock-free core (waker, sync/semaphore, sync/channel, preempt/tcb) is written against this module. Under normal builds (--cfg loom absent, atomics-polyfill off) this is a zero-cost alias of the core atomics; with RUSTFLAGS='--cfg loom' the same code compiles against loom’s atomics, letting the models in tests/loom.rs explore every interleaving of the Acquire/Release orderings that are otherwise justified only by prose comments. With atomics-polyfill on (ARMv6-M boards — no LDREX/STREX, so core’s AtomicU32 etc. don’t even have compare_exchange/fetch_or/swap on that target), portable_atomic provides the identical API via a critical-section- guarded fallback — every call site elsewhere in this crate is unaffected either way.

Structs

AtomicExperimental

A memory location which can be safely modified from multiple threads.

Enums

Ordering

Atomic memory orderings

Constants

ATOMIC_BOOL_INITDeprecated

An AtomicBool initialized to false.

ATOMIC_ISIZE_INITDeprecated

An AtomicIsize initialized to 0.

ATOMIC_USIZE_INITDeprecated

An AtomicUsize initialized to 0.

Traits

AtomicPrimitiveExperimental

A marker trait for primitive types which can be modified atomically.

Functions

compiler_fence

An atomic fence for synchronization within a single thread.

fence

An atomic fence.

spin_loop_hintDeprecated

Signals the processor that it is inside a busy-wait spin-loop (“spin lock”).

Type Aliases

AtomicBool

A boolean type which can be safely shared between threads.

AtomicI8

An integer type which can be safely shared between threads.

AtomicI16

An integer type which can be safely shared between threads.

AtomicI32

An integer type which can be safely shared between threads.

AtomicI64

An integer type which can be safely shared between threads.

AtomicIsize

An integer type which can be safely shared between threads.

AtomicPtr

A raw pointer type which can be safely shared between threads.

AtomicU8

An integer type which can be safely shared between threads.

AtomicU16

An integer type which can be safely shared between threads.

AtomicU32

An integer type which can be safely shared between threads.

AtomicU64

An integer type which can be safely shared between threads.

AtomicUsize

An integer type which can be safely shared between threads.