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From: pariseau@well.UUCP (Robert S. Pariseau)
Newsgroups: net.micro.amiga
Subject: Re: --Bug report-- (fonts -- bogus!)
Message-ID: <1265@well.UUCP>
Date: Thu, 12-Jun-86 21:24:55 EDT
Article-I.D.: well.1265
Posted: Thu Jun 12 21:24:55 1986
Date-Received: Tue, 17-Jun-86 07:57:42 EDT
References: <8606101821.AA15403@pavepaws>
Reply-To: pariseau@well.UUCP (Robert S. Pariseau)
Organization: Whole Earth Lectronic Link, Sausalito CA
Lines: 17

This is not a bug.  The memory usage model in the Amiga keeps disk-loaded
items in memory until a request for free memory exceeds the size of the
largest available free chunk.  This eliminates unecessary reloads from the
disk when an item is frequently closed and re-opened.

Disk-loaded fonts will stay in memory until AllocMem() goes through its
Expunge algorithm.  When AllocMem() decides to Expunge, it will attempt
to remove any disk-loaded font which currently has zero "openers".

Note that the process of Expunging fonts was BUGGY in V1.1.  It should
work correctly under V1.2.

Some programs use the trick of attempting to allocate a chunk of memory
which is larger than can possibly be available in order to force AllocMem()
to Expunge things that happen to be lying around.  Note that if the
Expunge processing actually removes anything, then AvailMem() will return
a larger number after the fake AllocMem() call than before.