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From: jimm@amiga.UUCP (Jim Mackraz)
Newsgroups: net.micro.amiga
Subject: Re: Question on Intuition Screens and Windows
Message-ID: <1248@amiga.amiga.UUCP>
Date: Sun, 1-Jun-86 19:19:28 EDT
Article-I.D.: amiga.1248
Posted: Sun Jun  1 19:19:28 1986
Date-Received: Tue, 3-Jun-86 22:40:25 EDT
References: <8605311838.AA02246@pavepaws>
Reply-To: jimm@homer.UUCP (Jim Mackraz)
Organization: Commodore-Amiga Inc., 983 University Ave #D, Los Gatos CA 95030
Lines: 31

In article <8605311838.AA02246@pavepaws> dillon@PAVEPAWS.BERKELEY.EDU (Matt Dillon) writes:
>
>	I have a program which spawns other processes (via CreatProc).  My
>question is simply:  
>	
>	If the master process creates an intuition screen, can the 
>subprocesses create windows in this new screen?  It seems to work, sorta
>(the Amiga crashes when I try to close everything up)... I would like to
>know whether it's illegal to do in Intution (and if it isn't, I know the
>problem lies somewhere in my code)
>
>					Thanks,
>
>					-Matt

What you said sounds OK as it stands, but the dangers lie in different
tasks closing up.  Opening a typical window leads to the creation of 
a Port (IDCMP) with the associated allocation of a signal.  Closing
the window typically deallocates that signal, and should be done by the same
task that created it.

Another route is to handle all of the port stuff yourself (create windows
with IDCMP initially NULL, and so on as described earlier and in the
developer's newsletter).

I don't think there is anything else.  The tasks which calls BeginRefresh
should be the same which calls EndRefresh().

If you can get a minimal program to display the problem, I would like
to see it.  Thanks.
				jimm