From: "Gilles Chanteperdrix" <gilles.chanteperdrix@xenomai.org>
To: Adrian Boeing <me@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] Interprocess Mutex
Date: Thu, 20 Nov 2008 13:48:31 +0100 (CET) [thread overview]
Message-ID: <3f7e4e30c68612bf269e955922cf6f82.squirrel@domain.hid> (raw)
In-Reply-To: <c024fefc0811200055r309fbedar73531c856f27565a@domain.hid>
Adrian Boeing wrote:
> Hi,
>
> Is it possible to create an inter-process mutex between kernel space and
> user space?
> If so, how is this done with the native API?
>
> The system has one real-time kernel process which communicates with other
> processes via shared memory.
See rt_mutex_bind:
http://www.xenomai.org/documentation/branches/v2.4.x/html/api/group__mutex.html#g39b3a0e7f6f6ee41b8068ed59e25d1d1
or, for the posix skin, pthread_mutexattr_setpshared:
http://www.xenomai.org/documentation/branches/v2.4.x/html/api/group__posix__mutex.html#g73bd8697b91e0ee9a63c30052ac9f72f
Note that for sharing a mutex with the posix skin, the pthread_mutex_t
structure needs to reside on a shared memory.
--
Gilles.
next prev parent reply other threads:[~2008-11-20 12:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-20 8:55 [Xenomai-help] Interprocess Mutex Adrian Boeing
2008-11-20 12:48 ` Gilles Chanteperdrix [this message]
2008-11-21 0:03 ` Adrian Boeing
2008-11-21 2:43 ` Philippe Gerum
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