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Re: Re: mutex and mailbox query

From: Andrew Lunn <andrew at lunn dot ch>
To: Savin Zlobec <savin at torina dot fe dot uni-lj dot si>
Cc: Andrew Lunn <andrew at lunn dot ch>, hans dot doran at ibhdoran dot com,ecos-discuss at sources dot redhat dot com
Date: Sat, 20 Sep 2003 23:28:04 +0200
Subject: Re: [ECOS] Re: mutex and mailbox query
References: <20030920204708.GC3643@londo.lunn.ch> <Pine.LNX.4.30.0309202257220.25483-100000@torina.fe.uni-lj.si>

> > Problem is, you have no way of knowing if any threads are waiting on
> > the mbox or the mutex. There are no API calls to tell you this.
> 
> Yes, the following scenario limits the usage of mbox to cyg_mbox_tryget,
> or maybe the cyg_thread_release could be used.

Don't forget that cyg_mbox_put will also block, so you also have to do
a tryput.

cyg_thread_release is no use, you don't know which threads to
release!

        Andrew

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Follow-Ups:
- Re: Re: mutex and mailbox query
  - From: Savin Zlobec

References:
- Re: Re: mutex and mailbox query
  - From: Andrew Lunn
- Re: Re: mutex and mailbox query
  - From: Savin Zlobec

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