// Consider using the more ergonomic and less error-prone [Uintptr.Swap] instead.
func SwapUintptr(addr *uintptr, new uintptr) (old uintptr)

// SwapPointer atomically stores new into *addr and returns the previous *addr value.
// Consider using the more ergonomic and less error-prone [Pointer.Swap] instead.
func SwapPointer(addr *unsafe.Pointer, new unsafe.Pointer) (old unsafe.Pointer)

// CompareAndSwapInt32 executes the compare-and-swap operation for an int32 value.