From: "Ara.T.Howard" <Ara.T.Howard@...>
Date: 2005-09-03T08:51:26+09:00
Subject: Re: Thread for scheduling

On Sat, 3 Sep 2005, csjasnoch@wisc.edu wrote:

> I would like to be able to create a thread that uses a schedule (located in
> a file) and continues to run and do a system call when the time is right. I
> have most of it implimented but I am having a problem keeping the main
> interface active while allowing the 2nd thread (my system caller) to still
> function at the correct time.
>
> I have a Tk interface that upon the click of a start button, will start an
> already created and stopped thread.
>
> I am use thread.run to do this. However, if I do not use thread.join
> afterwards it seems that the thread goes to sleep as I want it to, but then
> never wakes up:(
>
> If I use thread.join it does everything fine, but my main process (the user
> interface) is locked and can not do anything.
>
> So how can I make it so my interface is still active and my secondary >
> thread is running in the background doing the system calls when the time is
> right?

this is __exactly__ what i wrote session for - to allow a gui thread to run
background commands in a way that does not block the calling thread.  so,
__assuming__ your threaded programming is right try

   require 'session'

   Session::new do |sh|
     stdout, stderr, sh.execute command
     status = sh.status
   end

to run your commands in thread.  session is on the raa.

hth.

-a
-- 
===============================================================================
| email :: ara [dot] t [dot] howard [at] noaa [dot] gov
| phone :: 303.497.6469
| Your life dwells amoung the causes of death
| Like a lamp standing in a strong breeze.  --Nagarjuna
===============================================================================