Function atomic_xadd

pub unsafe fn atomic_xadd<T: Copy, const ORD: AtomicOrdering>(
    dst: *mut T,
    src: T,
) -> T

🔬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. For example, AtomicIsize::fetch_add.