Function atomic_xadd_relaxed

pub unsafe fn atomic_xadd_relaxed<T>(dst: *mut T, src: T) -> T
where
    T: Copy,

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

Adds to the current value, returning the previous value. T must be an integer or pointer type. If T is a pointer type, the provenance of src is ignored: both the return value and the new value stored at *dst will have the provenance of the old value stored there.

The stabilized version of this intrinsic is available on the atomic types via the fetch_add method by passing Ordering::Relaxed as the order. For example, AtomicIsize::fetch_add.