From: Andrew Lunn <andrew.lunn@ascom.ch>
To: Geoff Patch <grp@cea.com.au>
Cc: "'ecos-discuss@sources.redhat.com'" <ecos-discuss@sources.redhat.com>
Subject: Re: [ECOS] semaphore bug??
Date: Wed, 15 Aug 2001 00:15:00 -0000 [thread overview]
Message-ID: <20010815091455.L4703@biferten.ma.tech.ascom.ch> (raw)
In-Reply-To: <01C12580.59C1CFC0.grp@cea.com.au>
On Wed, Aug 15, 2001 at 11:49:32AM +1000, Geoff Patch wrote:
>
> Hi Folks,
>
> > I don't think you can post to a semaphore from an ISR. You'll
> > have to run a DSR and do it there. There's a table in the eCos
> > Reference Manual (Device Driver Interface to the Kernel) that
> > shows what functions may be called from an ISR. About the only
> > thing you can do is ack/mask/unmask interrupts and run a DSR.
>
> This is correct, and I recall other postings to the list about this issue.
> It's obviously a fairly common misconception.
How about adding an assertion check to semaphores and mutex etc. If
they are called from within an ISR throw an assertion.
Andrew
next prev parent reply other threads:[~2001-08-15 0:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-14 18:55 Geoff Patch
2001-08-15 0:15 ` Andrew Lunn [this message]
2001-08-15 0:24 ` Jonathan Larmour
-- strict thread matches above, loose matches on Subject: below --
2001-08-14 12:21 Warren Jasper
2001-08-14 13:09 ` Grant Edwards
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