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From: Philippe Gerum <rpm@xenomai.org>
Message-ID: <55F6B99F.1090707@xenomai.org>
Date: Mon, 14 Sep 2015 14:12:15 +0200
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Subject: Re: [Xenomai] how to check RT_MUTEX_INFO.owner
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To: Frederik Bayart <frederik_bayart@yahoo.co.uk>, "xenomai@xenomai.org" <xenomai@xenomai.org>

On 09/14/2015 02:03 PM, Frederik Bayart wrote:
> In the documentation of RT_MUTEX_INFO is described :
> RT_TASK owner : Current mutex owner, or null if unlocked.
> 
> But this is not a pointer, so it can't be compared with NULL. Should you check RT_TASK.handle ?
> 

You should compare the handle to NO_ALCHEMY_TASK, i.e.:

include/alchemy/task.h:#define NO_ALCHEMY_TASK	((RT_TASK){ 0, 0 })

-- 
Philippe.