RE: [ECOS] FW: [ECOS] Mailboxes - priorities of messages

["Retallack, Mark (Siemens)" <mark dot retallack at siemens dot com>]

Just rushing in with this suggestion:

mq_open, mq_send. see
http://www.opengroup.org/onlinepubs/007908799/xsh/mq_send.html

Its in the ecos posix layer. I don't know if the priority works (it should
do), but its a start.


> -----Original Message-----
> From: Gorjup Matthias [mailto:Matthias.Gorjup@SIEMENS.AT]
> Sent: Tuesday 29 June 2004 11:48 AM
> To: ''Ecos-Discuss (E-Mail)'
> Subject: [ECOS] FW: [ECOS] Mailboxes - priorities of messages
> 
> 
> Hello Andrew,
> 
> Here are some details of our mBox problem;
> 
> When more than one thread (task) is using the same mBox to 
> communicate with
> one another thread, the send/received mails(messages) has to 
> be kept in a
> message qeue. ( or they arrive to mBox and kept in an order qeue). 
> 
> In this message qeue, we need to put the process of the 
> messages (mails) in
> a prioritisation. For example , a critical mail send by a 
> timeout function
> has to be processed before a user request mail which is send 
> through the
> same mBox to the same thread.
> 
> I hope this gives you enough info.
> 
> Regards.
> Tolga
> 
>    
> 
> -----Original Message-----
> From: Gorjup Matthias
> To: 'Tolga SIMSEK' (E-Mail)
> Sent: 29.06.2004 12:34
> Subject: WG: [ECOS] Mailboxes - priorities of messages
> 
> 
> 
> -----Ursprungliche Nachricht----- 
> Von: Andrew Lunn [ mailto:andrew@lunn.ch <mailto:andrew@lunn.ch> ] 
> Gesendet: Dienstag, 29. Juni 2004 11:29 
> An: Gorjup Matthias 
> Cc: 'ecos-discuss@ecos.sourceware.org' 
> Betreff: Re: [ECOS] Mailboxes - priorities of messages 
> 
> 
> On Tue, Jun 29, 2004 at 10:02:32AM +0200, Gorjup Matthias wrote: 
> > Hello, 
> > 
> > we are porting a special ethernet driver to eCos and we 
> would need to 
> > implement prioritozed mailbox messages for communication between
> threads. Is 
> > it possible to use priorities for mbox messages? If not, is 
> there some
> 
> > workaround or another solution that we could use? 
> 
> Prioritized could mean many different things. Please could 
> you be more 
> specific. Are you talking about the threads blocking for 
> access to the 
> mbox, the messages withing the mbox, or some other priority feature. 
> 
>         Andrew 
> 
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