On Mon, Jul 8, 2024 at 4:06 PM Antonio Caceres Cabrera <juliocacerc...@gmail.com> wrote: > > Unless, the C function stores the pointer and it's kept after the call > returns, correct? That's what I mean by calling the function > keep_this_pointer in the second example. In this case, it would be necessary, > I'm assuming?
Ah, yes, in that case the pointer does have to be pinned. Ian > On Monday, July 8, 2024 at 11:56:30 PM UTC+2 Ian Lance Taylor wrote: >> >> On Mon, Jul 8, 2024 at 12:38 PM Antonio Caceres Cabrera >> <julioca...@gmail.com> wrote: >> > >> > Sorry, accidentally hit the wrong response button, so I'm posting it again: >> > >> > Thanks for the clarification, Ian. >> > >> > Is it also possible to pin memory to local go-arrays? >> > The docs state >> > >Go values created by calling new, by taking the address of a composite >> > >literal, or by taking the address of a local variable may also have their >> > >memory pinned using runtime.Pinner. >> > >> > In this example: >> > ``` >> > var pin runtime.Pinner >> > var buf [32]byte >> > pin.Pin(&buf[0]) >> > C.keep_this_pointer(&buf[0]) >> > ``` >> > >> > Is this ok since it counts as taking the address of a local variable or >> > would the array have to be created with `new([32]byte)` ? >> >> Yes, this is an example of taking the address of a local variable. >> The runtime.Pinner is not required here. >> >> In general a runtime.Pinner is only required when passing the address >> of a value that itself contains Go pointers. In that case the >> internal Go pointers need to be explicitly pinned. >> >> 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/b3b3a36b-87ba-4271-b004-810670eb759an%40googlegroups.com. -- 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/CAOyqgcW-iNjU2EcRCNxr_p93jgbXic%2BU0vHqgjvW_Z3%3DrJkdnA%40mail.gmail.com.
