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From: bryce@hoser.berkeley.edu.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: Intuition's "dont mess with these" fields...
Message-ID: <21517@ucbvax.BERKELEY.EDU>
Date: Fri, 30-Oct-87 00:54:29 EST
Article-I.D.: ucbvax.21517
Posted: Fri Oct 30 00:54:29 1987
Date-Received: Sun, 1-Nov-87 06:08:10 EST
References: <1961@amiga.amiga.UUCP> <1825@cadovax.UUCP> <21469@ucbvax.BERKELEY.EDU> <1830@cadovax.UUCP>
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: bryce@hoser.berkeley.edu.UUCP (Bryce Nesbitt)
Organization: University of California at Berkeley
Lines: 35
Keywords: Intuition verboten nopokenzefields

In article <1830@cadovax.UUCP> keithd@cadovax.UUCP (Keith Doyle) writes:
>In article <21469@> bryce@hoser.berkeley.edu (Bryce Nesbitt) writes:
>
>>BTW:  The "LockIBase(0L)" call can be used to disable Intuition temporarily
>>while doing wild things.  Again it is not good to do such things, but at
>>least try to protect yourself.  Example:
  ^^^^^
>>long key;
>>	key=LockIBase(0L);
>>	/* Do funny stuff here... but not much of it... be QUICK! */
>>	UnlockIBase(key);
>
>Sounds reasonable.  Is this any better/worse/different than doing a
>Forbid()/Permit() or an Enable()/Disable() ?

It is much better.  LockIBase(0L); will force your task to wait until
Intuition is done doing things like, say, dragging a screen.  If you
just Forbid() or Disable() you might catch Intuition in the middle.

You are going to get a lot of hostility from Amiga programmers if you
release a product that mucks with the Intuition private data structure.
I speak for many of them when I say that *WE* want Commodore to release an
updated private data structure next release.  If *you* screw with this,
*WE* are going to be upset.

In fact, I rather hope Commodore scrambles that structure in the next 
release... just so programs that break the rules get broken.  (That would
be as of Intuition version 35).  It is far better to clean up the software
base now than be crippled in the future.

|\ /|  . Ack! (NAK, SOH, EOT)
{o O} . bryce@hoser.berkeley.EDU -or- ucbvax!hoser!bryce
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