std::intrinsics::atomic_cxchgweak_acq - Rust
Description: API documentation for the Rust `atomic_cxchgweak_acq` fn in crate `std`.
Keywords: rust, rustlang, rust-lang, atomic_cxchgweak_acq

# Function std::intrinsics::atomic_cxchgweak_acq [−] [src]

    pub unsafe extern "rust-intrinsic" fn atomic_cxchgweak_acq<T>(dst: *mut T,
                                                                  old: T,
                                                                  src: T)
                                                                  -> (T, bool)

Unstable (`core_intrinsics`)

: intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library

Stores a value if the current value is the same as the `old` value. The stabilized version of this intrinsic is available on the `std::sync::atomic` types via the `compare_exchange_weak` method by passing `Ordering::Acquire` as both the `success` and `failure` parameters. For example, `AtomicBool::compare_exchange_weak`.

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