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From: bryce@hoser.berkeley.edu (Bryce Nesbitt)
Newsgroups: comp.sys.amiga
Subject: Re: Help on Access to Exec system lists in C
Message-ID: <21555@ucbvax.BERKELEY.EDU>
Date: Mon, 2-Nov-87 03:37:27 EST
Article-I.D.: ucbvax.21555
Posted: Mon Nov  2 03:37:27 1987
Date-Received: Thu, 5-Nov-87 23:14:19 EST
Sender: usenet@ucbvax.BERKELEY.EDU
Lines: 30
Keywords: C, exec, lists

In article <1492@ssc-vax.UUCP> bact@ssc-vax.UUCP (Archie A. Auxter) writes:
>Does anybody out there know how to get access to the system lists that
>Exec keeps?  I know about the list routines provided by exec, but I
>want to get pointers to the head of certain lists.

I'm about to hand you a loaded gun.  You must use extreme caution
when accesing exec lists.
The list headers are defined in the include file "exec/execbase.h".
Forbid() and Permit() are the proper arbitration mechanisms for
*some* of these lists.  The rest require Disable() Enable() and
*very* quick code.


>I'd also like to
>be able to get access to any lists held in Intuition.
>I'd like to be able to access the head of the list where windows
>are kept.

Now that gun is a 16mm cannon.  The list headers are defined
in the include file "intuition/intutionbase.h".

The proper arbitration here is the Intuition function key=LockIBase(0L);
and UnLockIBase(key).  Search you newsfeed backwards for an article by
Jim Mackraz (jimm) on this point. 

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{o O} . bryce@hoser.berkeley.EDU -or- ucbvax!hoser!bryce
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