Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!seismo!rochester!rutgers!lll-lcc!well!ewhac
From: ewhac@well.UUCP (Leo 'Bols Ewhac' Schwab)
Newsgroups: comp.sys.amiga
Subject: Re: How do I force a context switch?
Message-ID: <3663@well.UUCP>
Date: Mon, 3-Aug-87 05:04:45 EDT
Article-I.D.: well.3663
Posted: Mon Aug  3 05:04:45 1987
Date-Received: Tue, 4-Aug-87 01:49:20 EDT
References: <5175@utcsri.UUCP> <2609@hoptoad.uucp>
Reply-To: ewhac@well.UUCP (Leo (My glasses have gate arrays) Schwab)
Distribution: world
Organization: Chrysler/GM, Makers of the 6000 SUX.
Lines: 34
Summary: Nah, you want to use the tools already there.

[ Invest in OCP.  You have 20 seconds to comply. ]

In article <2609@hoptoad.uucp> farren@hoptoad.UUCP (Mike Farren) writes:
>In article <5175@utcsri.UUCP> flaps@utcsri.UUCP (Alan J Rosenthal) writes:
>>
>>  I'm writing a program where several tasks are started.
>>Through use of priorities, all are started at once.  One of these
>>functions sets a global variable that others need.  If through bad luck
>>another function starts running first and tries to use this global
>>variable before it's set, it has to allow the first function to set it
>>before proceeding.
>
>Seems to me that relying on the scheduling algorithm in EXEC to synchronize 
>your tasks is a dangerous and losing proposition.  Why not have the main
>task Wait() until the first sub-task has set its global before launching
>the rest of the sub-tasks?  [ ... ]

	Sounds to me like a classic application for semaphores, which the
Amiga has.

	No, I don't know how they work exactly.  Would anyone at CATS care
to clarify their use?

_-_-_-_-_-_-_-_-_-_ Old signature used as 'inews' filler. _-_-_-_-_-_-_-_-_-_
 ________		 ___			Leo L. Schwab
	   \		/___--__		The Guy in The Cape
  ___  ___ /\		    ---##\		ihnp4!ptsfa!well!ewhac
      /   X  \_____    |  __ _---))			..or..
     /   /_\--    -----+==____\ // \  _		well ---\
___ (   o---+------------------O/   \/ \	dual ----> !unicom!ewhac
     \     /		    ___ \_  (`o )	hplabs -/       ("AE-wack")
 ____ \___/			     \_/
	      Recumbent Bikes:			"Work FOR?  I don't work FOR
	    The _O_n_l_y Way To Fly!		anybody!  I'm just having fun."