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From: phillip@cbmvax.cbm.UUCP (Phillip Lindsay)
Newsgroups: net.micro.amiga
Subject: Re: Question on Asyncronous IO message ports
Message-ID: <730@cbmvax.cbmvax.cbm.UUCP>
Date: Fri, 12-Sep-86 09:03:20 EDT
Article-I.D.: cbmvax.730
Posted: Fri Sep 12 09:03:20 1986
Date-Received: Fri, 12-Sep-86 22:27:47 EDT
References: <8609100455.AA19638@cory.Berkeley.EDU> <725@cbmvax.cbmvax.cbm.UUCP>
Organization: Commodore Technology, West Chester, PA
Lines: 34

> > 
> > 	If I queue a write to the DOS handler for a specific file, then do
> > some other operation normally (such as a Read() or Seek()), will the DOS
> > handler do the write operation before the Read() or Seek() (e.g. in the
> > order PutMsg'd to the port), or can things get mixed around?
> > 
> > 				Thanks,
> > 
> > 				-Matt
> 
> The requests are handled in a "fifo" fashion. So yes, if you queue a write
>  then a read ... the write will be done first.
> -- 

From Neil Katin:

"The user cannot have more than one packet outstanding to an individual
 handler at once.  This is especially true for things like CON:, SER:,
 etc."

 "For the file system, one can only have one packet per open file
 handle."
-- 

==============================================================================
  Phillip Lindsay - Commodore Business Machines - Amiga Technical Support
    Dirt: 1200 Wilson Drive, West Chester  PA 19380                
    uucp: {ihnp4|seismo|caip}!cbmvax!phillip
    arpa: cbmvax!phillip@seismo -or- phillip@cbmvax.UUCP@{seismo | harvard}
    Tel.: (215) 431-9180
Disclaimer: [someone said I needed this] No warranty is implied or otherwise
   given in the form of suggestion or example. Any opinions found here are of
   my making. [unless Fred pops up (my other self)] 
==============================================================================