> You can use a *byte for the buffer. For instance, unix.Iovec does this
Are you sure that's not a bug? What's to stop the *Byte from being moved by the GC? On Fri, May 14, 2021 at 2:27 PM Michael Pratt <mpr...@google.com> wrote: > > You can use a *byte for the buffer. For instance, unix.Iovec does this: > https://pkg.go.dev/golang.org/x/sys/unix#Iovec > > Users can cast a *unix.Iovec directly to unsafe.Pointer for Syscall without > any special handling of the *byte field. > > On Fri, May 14, 2021, 09:01 sh...@tigera.io <sh...@tigera.io> wrote: >> >> Now, is it technically legal to convert a uintptr to some location that was >> manually allocated and then cast it to an unsafe.Pointer? When I look at >> the docs for unsafe.Pointer, I can't match that to any of the cases but it >> seems very likely to be safe by analogy with the GCO rules for handling "C" >> pointers and "Go" pointers. >> >> On Friday, May 14, 2021 at 1:24:28 PM UTC+1 sh...@tigera.io wrote: >>> >>> Thanks for the pointer to that package; looking at our go.mod, looks like >>> we've already got it as a transitive dependency so it looks ideal for my >>> use case. >>> >>> On Friday, May 14, 2021 at 12:10:45 PM UTC+1 Jan Mercl wrote: >>>> >>>> On Fri, May 14, 2021 at 12:36 PM sh...@tigera.io <sh...@tigera.io> wrote: >>>> >>>> > One way I could see to solve this would be to do some manual memory >>>> > management with MMap or BRK to allocate the buffer but I wondered if >>>> > there was an easier way? >>>> >>>> IMO using manual memory management _is_ the easy way in this case. I'm >>>> using https://pkg.go.dev/modernc.org/memory for this. >> >> -- >> 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/317d44cf-8f2b-42d6-ab10-b42da7280616n%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/CAMhR0U2_QWLimoS0GJtwHCjFyJt-0qct3n-N%2BP98n-wdjeZPYw%40mail.gmail.com.
