# Function std::intrinsics::atomic_cxchgweak_seqcst_seqcst

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    pub unsafe extern "rust-intrinsic" fn atomic_cxchgweak_seqcst_seqcst<T>(
        dst: *mut T,
        old: T,
        src: T
    ) -> (T, bool)where
        T: Copy,

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

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::SeqCst` as both the success and failure parameters. For example, `AtomicBool::compare_exchange_weak`.