From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Nathaniel.J.Villaume@domain.hid
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] rt_heap_delete in asynchronous context
Date: Mon, 29 May 2006 14:45:36 +0200 [thread overview]
Message-ID: <17530.60656.867991.966403@domain.hid> (raw)
In-Reply-To: <1148860914-13365.00015.03228-smmsdV2.1.4@domain.hid>
Nathaniel J Villaume wrote:
> Hi,
>
> I have a simple user-space program (see below) that tries to
> create a heap. If the heap already exists, then the program tries
> to delete it. I have no other threads binding to the heap.
>
> I can create, but not delete the heap. The error returned is
> -EPERM. According to the API manual, this means the call occurred
> in an asynchronous context. What does this mean, exactly? How
> should I delete this heap?
>
> Any advice?
You should not try and delete a heap if you did not succeed in creating
or binding it. The contents of the RT_HEAP object are uninitialized
when rt_heap_create fails, rt_heap_delete call munmap passing the
contents of this uninitialized object, and munmap returns -1 with errno
set to EINVAL. rt_heap_delete should be fixed to return -errno in this
case, but you should bind the heap before deleting it.
--
Gilles Chanteperdrix.
next prev parent reply other threads:[~2006-05-29 12:45 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-29 0:01 [Xenomai-help] rt_heap_delete in asynchronous context Nathaniel J Villaume
2006-05-29 12:45 ` Gilles Chanteperdrix [this message]
2006-05-29 18:19 ` Nathaniel J Villaume
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