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From: barnettj@pookie.crd.ge.com (Janet A Barnett)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: Intuition beginner's problem
Summary: A lot depends on your compiler
Keywords: multitasking intuition
Message-ID: <17930@crdgw1.crd.ge.com>
Date: 27 Mar 91 01:54:39 GMT
References: <1511@tau.sm.luth.se>
Sender: news@crdgw1.crd.ge.com
Distribution: comp
Organization: General Electric Corporate R&D Center
Lines: 19

In article <1511@tau.sm.luth.se> d89-rbn@sm.luth.se (Robert Buren) writes:
>
>I'm learning how to use multitasking in my programs, but I seem to have
>run into a problem here.

The method of spinning off a task from a loaded program depends heavily
on the compiler you are using.  If you have a late model SAS/C compiler, be
sure to use the -y option so that the Global data pointer is reloaded into
register a4 when your "subroutine" is invoked. (Since the spawned task
executes in a different context from the parent task, there is no
guarentee that this register is still pointing to the global data area.)
Oh, you can also declare your routine as:
void __saveds routinename(); (or possibly __saveds void routinename())
then you don't have to have every routine do the a4 reload.

I do not know what facilities other C compilers may provide for this
kind of thing.

AB