Path: utzoo!utgpu!watmath!maytag!aries5!jb
From: jb@aries5.uucp
Newsgroups: comp.sys.mac.programmer
Subject: File System Re-entrancy
Message-ID: <924@maytag.waterloo.edu>
Date: 29 Nov 89 00:52:13 GMT
Sender: daemon@maytag.waterloo.edu
Reply-To: jb@aries5.UUCP ()
Organization: Computer Systems Group, University of Waterloo
Lines: 12

This may seem like a strange question but seeing the discussion on
multi-tasking, I have a related question.

Is there any reliable way to make the device manager re-entrant.
 
In other words if I do a PBRead() to a device driver can that device
driver synchronously do another PBRead() to another device driver?  

From what I have observed this is non-trivial, because the second
PBRead() will block becasue FSBusy is set.

Jim Bruyn