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Date: Mon, 30 Mar 2015 17:17:46 +0200
From: Philippe Gerum <rpm@xenomai.org>
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Subject: Re: [Xenomai] There is XDDP Sockets support in kernel?
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To: Helder Daniel <hdaniel@ualg.pt>, "Xenomai@xenomai.org" <xenomai@xenomai.org>

On 03/30/2015 05:13 PM, Philippe Gerum wrote:
> On 03/30/2015 04:55 PM, Helder Daniel wrote:
>> Hi,
>>
>> When trying to compile a kernel module that sets up a XDDP socket (code
>> snippet below) with Xenomai 3.x-rc3 on Cobalt setup,
>> rtdm_bind() returns ENOSYS.
>> This means that XDDP sockets can not be used in kernel?
>>
> 
> No, in this case it likely means that you are calling it from a
> real-time context (i.e. a real-time kthread started with
> rtdm_task_create()). The binding op can only run from a non-rt context,
> e.g. module init code, regular kthread context, _nrt handler.
> 

Please note that such restriction only applies to kernel-based callers.
When called from user-space via the bind() routine, Cobalt automatically
switches the caller to non-rt mode.

-- 
Philippe.