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 > <https://groups.google.com/d/msgid/golang-nuts/317d44cf-8f2b-42d6-ab10-b42da7280616n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/CALoThU-Ph1vE%3DgAPLGtD76aBHU6bgxxuquf_3E7c__9dm0UH1A%40mail.gmail.com.
