Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!pasteur!ucbvax!dewey.soe.berkeley.edu!oster
From: oster@dewey.soe.berkeley.edu (David Phillip Oster)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Max. no. of code segments
Message-ID: <28903@ucbvax.BERKELEY.EDU>
Date: 26 Apr 89 03:48:31 GMT
References: <53100005@uxh.cso.uiuc.edu>
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: oster@dewey.soe.berkeley.edu.UUCP (David Phillip Oster)
Organization: School of Education, UC-Berkeley
Lines: 18

In article <53100005@uxh.cso.uiuc.edu> thinfilm@uxh.cso.uiuc.edu writes:
>  What is the largest number of segments allowed in an application on the
>mac and what rules should one work by for this. 
Since a resource map can only have about 2000 entries, you can only have
2000 code segements in one file.

The global segment jump table is 32k bytes long, so you can only have
roughly 4k jump insturctions in it: that is, you can only have 4k globally
visible procedures. Both C (the "static" keyword) and pascal (nested
procedures) let you define procedures that won't appear in the global
segment tables.

Note: the reosource manager uses linear search, so if you have 2k code
segments, any procedure cal that causes a LoadSegement() will likely be slow.

--- David Phillip Oster            --"When we replace the mouse with a pen,
Arpa: oster@dewey.soe.berkeley.edu --3 button mouse fans will need saxophone
Uucp: {uwvax,decvax}!ucbvax!oster%dewey.soe.berkeley.edu --lessons." - Gasee