Function `atomic_cxchgweak`

unsafe fn atomic_cxchgweak<T: Copy, ORD_SUCC: AtomicOrdering, ORD_FAIL: AtomicOrdering>(_dst: *mut T, _old: T, _src: T) -> (T, bool)

Stores a value if the current value is the same as the old value. T must be an integer or pointer type. The comparison may spuriously fail.

The stabilized version of this intrinsic is available on the atomic types via the compare_exchange_weak method. For example, AtomicBool::compare_exchange_weak.