Path: utzoo!utgpu!watserv1!watdragon!rose!sjorr
From: sjorr@rose.waterloo.edu (Stephen Orr)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Wait()ing Peacefully
Message-ID: <22144@watdragon.waterloo.edu>
Date: 18 Mar 90 15:18:22 GMT
References: <1322@mindlink.UUCP>
Sender: daemon@watdragon.waterloo.edu
Reply-To: sjorr@rose.waterloo.edu (Stephen Orr)
Organization: U. of Waterloo, Ontario
Lines: 32

>You almost had it. Instead of trying to or the bits into one flag
>to wait for, set up two flags and then or in the call to wait(), like this.
>wait1flag = <port 1's mp_SigBit>;
>wait2flag = <port 2's mp_SigBit>;
>wait(wait1flag | wait2flag);

This is functionally the same as what he was doing, please note
however that the initialization of wait1flag and wait2flag
should be

	wait1flag = 1<<mp_SigBit &
	wait2flag = 1<<mp_SigBit

Further the wait call (which should be capitolized) returns
a bitfield to tell you which 'waits' succeeded, the wait call
should then be

	ports = Wait(wait1flag | wait2flag);

Which justifies the use of the waitnflag variables as you can
now see which port(s) succeeded with

	if (ports & wait1flag) { /* do stuff */
	}
	if (ports & wait2flag) { /* do other stuff */
	}

Note: it is very possible for more than 1 port to succeed at
the same time.

					Stephen Orr
					SandIsoft