On Fri, Jul 19, 2019 at 4:33 PM <ju...@sqreen.io> wrote: > > I would like to make sure that the following line of Go is a defined behavior: > > addr := (*unsafe.Pointer)((unsafe.Pointer)(&ptr)) > > I use it to perform atomic loads and stores to addr such as in this simple > example: https://play.golang.org/p/DpDrRvTYMG8 > It allows me not to use atomic.Value which performs two atomic operations and > possible disable preemption > (https://golang.org/src/sync/atomic/value.go?s=1233:1269#L35).
Yes, that operation is defined. As documented at https://golang.org/pkg/unsafe, you can use unsafe.Pointer to convert from a pointer to one type to a pointer to a different type. Ian -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAOyqgcUq65RATwbr6z9RNthxqcJTEPwtVyiQXjU_04TpOKWKLw%40mail.gmail.com.
