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From: Philippe Gerum <rpm@xenomai.org>
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Date: Wed, 03 Aug 2011 15:53:08 +0200
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Subject: Re: [Xenomai-help] Xenomai VxWorks Skin--->semTake
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To: Sambasiva Rao Manchili <sambasiva.manchili@domain.hid>
Cc: Antonio Gambin <antonio.gambin@domain.hid>, "Xenomai-help@domain.hid" <Xenomai-help@domain.hid>

On Wed, 2011-08-03 at 15:31 +0200, Sambasiva Rao Manchili wrote:
> Hi Gilles,
> I had seen the code  in src\skins\vxworks\semLib.c it returns ERROR which is -1.
> 
> The value that I sent earlier is the value that I got out of the following statement.
> serrLog( serrErr,
>              "resu_getonline_1_svc: semTake for restab_access_smp failed!!<%s>",
>               strerror(errnoGet()));
> 
> Is it right ?
> 
> 
> Now again I tried with
>  serrLog( serrErr,
>              "resu_getonline_1_svc: semTake for restab_access_smp failed!!<%s> <%d>",
>               strerror(errnoGet()), errno);
> 
> Here I get value 1 for errno.

You are trying to grab the mutex from a non-Xenomai thread context. This
is invalid.

> 
> Samba.
> -----Original Message-----
> From: Gilles Chanteperdrix [mailto:gilles.chanteperdrix@xenomai.org]
> Sent: Wednesday, 03. August, 2011 15:18
> To: Sambasiva Rao Manchili
> Cc: Philippe Gerum; Antonio Gambin; Xenomai-help@domain.hid
> Subject: Re: [Xenomai-help] Xenomai VxWorks Skin--->semTake
> 
> On 08/03/2011 02:44 PM, Sambasiva Rao Manchili wrote:
> > Hi Philppe,
> > Failed and return with error code is  <Unknown error 4294967295> and continues. I do not know the granularity of time  here, if it is returning immediately or not.
> > We have about 15 tasks spawned in this whole system. Done very very minimal changes to our VxWorks code to run on Linux over Xenomai version 2.5.6.   Board does not crash.
> > CPU Platform is Intel x86 Arch 32 Bit.
> 
> semTake does not return error code directly, it returns ERROR (which is -1, or 4294967295 if you cast to unsigned), and the real error is in the errno variable.
> 
> --
>                                             Gilles.
> 
> 
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> 

-- 
Philippe.