Function atomic_cxchg_relaxed_acquire

pub unsafe fn atomic_cxchg_relaxed_acquire<T: Copy>(
    _dst: *mut T,
    _old: T,
    _src: T,
) -> (T, bool)

🔬This is a nightly-only experimental API. (core_intrinsics)

Stores a value if the current value is the same as the old value.

The stabilized version of this intrinsic is available on the atomic types via the compare_exchange method by passing Ordering::Relaxed and Ordering::Acquire as the success and failure parameters. For example, AtomicBool::compare_exchange.