Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!eecae!netnews.upenn.edu!rutgers!bellcore!texbell!uhnix1!sugar!peter
From: peter@sugar.uu.net (Peter da Silva)
Newsgroups: comp.sys.amiga.tech
Subject: Re: inputs from many windows.
Keywords: windows, messages, IDCMP, stupid!
Message-ID: <3358@sugar.uu.net>
Date: 29 Jan 89 00:51:21 GMT
References: <1918@pur-phy>
Distribution: comp.sys.amiga.tech
Organization: Sugar Land Unix - Houston, TX
Lines: 22

Browser 1.2 and 1.3 just opened an IDCMP for each window, and had a loop like
this:

	while(1) {
		Wait(sigmask); /* sigmask is OR of all ports' sigbits */
		for(each window, w) {
			while(msg = GetMsg(w->UserPort->mp_SigBits)) {
				copymsg = *msg; /* structure copy */
				ReplyMsg(msg);
				switch(copymsg.Class) {
					...
				}
			}
		}
	}

Browser 1.4 and 1.5 had one IDCMP shared between all the windows, and used
CLoseWindowSafely(). Unfortunately, it wasn't safe. So 1.6 has gone back to
one IDCMP per window.
-- 
Peter "Have you hugged your wolf today" da Silva  `-_-'  Hackercorp.
...texbell!sugar!peter, or peter@sugar.uu.net      'U`