The protocol that all types that can be made atomic must conform to.
protocol AtomicPrimitiveDo not add conformance to this protocol for arbitrary types. Only a small range of types have appropriate atomic operations supported by the CPU, and those types already have conformances implemented.
static var atomic_add: (OpaquePointer, Self) -> Selfstatic var atomic_compare_and_exchange: (OpaquePointer, Self, Self) -> Boolstatic var atomic_create: (Self) -> OpaquePointerstatic var atomic_destroy: (OpaquePointer) -> Voidstatic var atomic_exchange: (OpaquePointer, Self) -> Selfstatic var atomic_load: (OpaquePointer) -> Selfstatic var atomic_store: (OpaquePointer, Self) -> Voidstatic var atomic_sub: (OpaquePointer, Self) -> Self