Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!apple!oliveb!amiga!kodiak
From: kodiak@amiga.UUCP (Robert R. Burns)
Newsgroups: comp.sys.amiga.tech
Subject: Re: narrator problem
Message-ID: <4058@amiga.UUCP>
Date: 12 Jul 89 18:06:17 GMT
References: <2210@goanna.oz>
Reply-To: kodiak@tooter.UUCP (Robert R. Burns)
Organization: Commodore-Amiga Inc, Los Gatos CA
Lines: 20

In article <2210@goanna.oz> phi@goanna.oz (Philip Hingston) writes:
)    /* Here's the crunch */
)    SendIO(wmes);
...
)    while(rmes->voice.message.io_Error != ND_NoWrite) {
...
)    GetMsg(WPort);

You are assuming that when the read responds with ND_NoWrite, that the 
write request will be completed and waiting for you at the WPort.  This
is not necessarily the case -- i.e. there's a race condition here.

Change GetMsg(WPort) to WaitIO(wmes).

- Kodiak
-- 
Bob Burns, {cbmvax,oliveb,well}!amiga!kodiak	   _
	| /_  _|. _ |	   Commodore __		  |_) _ |_  _ )'
	|<(_)(_)|(_\|<	    /\ |  ||| _` /\	  |_)(_\| )(_\ |
	| \ Software	___/..\|\/|||__|/..\___		   Faith