# Function __dsb

Source

    pub unsafe fn __dsb<A>(arg: A)where
        A: Dsb,

🔬This is a nightly-only experimental API. (`stdarch_arm_barrier` #117219)
Available on ARM only.
Expand description

Generates a DSB (data synchronization barrier) instruction or equivalent CP15 instruction.

DSB ensures the completion of memory accesses. A DSB behaves as the equivalent DMB and has additional properties. After a DSB instruction completes, all memory accesses of the specified type issued before the DSB are guaranteed to have completed.

The __dsb() intrinsic also acts as a compiler memory barrier of the appropriate type.