[Nova-developer] Re: Commands gnova/spiderd

[Juan C. R. F. <jc...@ca...>]

Hi my friends

The promissed schematics:

actual_dialog
async_dialog
synchro_dialog

I send the files in two formats: png and dia
(http://www.lysator.liu.se/~alla/dia/)

Before seeing the drawings you must consider that the ULT will be an
asynchronous thread.
Why?, well an example will clarify it:

      First you will have a thread for each telescope.

      If you send a "GOTO" command to de telescope, this one will be put in
movement,
      but only the associated XY service will have cpu time until the
movement will be
      completed making it impossible to abort a command sent by mistake
while
      the service does not release the CPU.

With a thread per ULT you can abort the previous ULT or you can send
commands
to other services or instruments in parallel.

Of course, will be a contention mechanism to access concurrently to the
services.

The client apis probably remains without changes, in the service's case
I'll modify the handler_output
to manage the answer and the handler_input will remain to handle the
unsolicited messages,
only if the instrument has this capacity, of course!.

Well, I'll wait your comments.
cheers
Juan Carlos
P.D. For fausto I have included the corrected spiderd.h file. tonight i'll
put it in cvs

(See attached file: actual_dialog.dia)(See attached file:
actual_dialog.png)(See attached file: async_dialog.dia)(See attached file:
async_dialog.png)(See attached file: synchro_dialog.dia)(See attached file:
synchro_dialog.png)(See attached file: spider.h)