On Sat, 29 Aug 2020 at 21:08, Lee Noar <lee.n...@sky.com> wrote:
>
> On 29/08/2020 19:55, Michael Grunditz wrote:
> > On Sat, 29 Aug 2020 at 20:24, Lee Noar <lee.n...@sky.com> wrote:
> >>
> >> On 29/08/2020 17:23, Michael Grunditz wrote:
> >>> Hi
> >>>
> >>> I think that exiting from socketpair on "operation in progress" is a bug.
> >>> The pair of sockets is o k , and that message is more informative than 
> >>> error.
> >>>
> >>> Having solved that , I have a follow up question:
> >>>
> >>> Does sockets only exist in the current task? If I do
> >>> "wimp_start_task", can I use my socket in the new task?
> >>
> >> No, although the underlining OS socket is I believe system wide, Unixlib
> >> refers to them by file descriptor and these are allocated locally within
> >> each task rather than system wide as Linux might do, so you can't
> >> pass the file descriptors between tasks.
> >>
> >> You may be able to pass the underlying OS socket between tasks, but
> >> Unixlib in the task you pass it to would not be aware of it; I don't
> >> think Unixlib can adopt an existing OS socket.
> >
> > Ok, so if I pass the filedescriptor to the second task it will be void?
>
> The second task may already be using that particular file descriptor
> for something else and if it isn't then there's no way to bind it
> to the OS socket that the first task is using.
>
> > Another option would be a mem based protocol.
>
> That's the method I went with, I use a dynamic area to pass messages
> between tasks. The dynamic area number is global and can be passed to
> the second task on the command line when it starts.

Thanks for the clarification .. I dont think the TRM on network module
is very helpful,, or my reading skills are bad!

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