Function core::intrinsics::atomic_cxchgweak_acq

pub unsafe extern "rust-intrinsic" fn atomic_cxchgweak_acq<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_weak method by passing Ordering::Acquire as both the success and failure parameters. For example, AtomicBool::compare_exchange_weak.