Harco Kuppens wrote:
  

Hi,

I noticed in the Xenomai native API that  the longer rt_create_intr :

    int rt_intr_create 
<http://www.xenomai.org/documentation/trunk/html/api/group__interrupt.html#ga0a9d98556ec838008f408a56e79d304> 
(RT_INTR *intr, const char *name, unsigned irq, rt_isr_t isr, rt_iack_t 
iack, int mode)

says in its documentation :

    This service can be called from:

        * Kernel module initialization/cleanup code
        * Kernel-based task
        * *User-space task*

I find it strange that it could be called from a user-space task.
I looked in /usr/xenomai/include/native/intr.h but there it really is 
defined when __KERNEL__ is defined.

So I guess this is an error in the  API documention?
    

No, there is no error: the service is implemented both in user-space and
 kernel-space, and if you look at native/intr.h, you will see two
definitions of rt_intr_create: one for kernel-space and one for user-space.

Note however that the interface in user-space is not the same as in
kernel-space, that is because in user-space, you are supposed to call
rt_intr_wait to wait for the next interrupt.