[Xenomai-core] VxWorks skin improvement

[Philippe Gerum <rpm@xenomai.org>]

I'm currently working on extending the VxWorks skin so that it is going to be 
callable from user-space directly, without needing the UVM environment. This will 
also make its functional extension easier in the future, especially with respect 
to bsp-related services.

While I'm at it, I'd also like to polish a few corner cases, so that we have the 
closest possible emulation of the original RTOS services. Unfortunately, the 
VxWorks documentation is rather terse on some behavioural aspects, and I have no 
VxWorks target at hand to test and check them. Therefore, I definitely need help 
from people reading this list who also happen to be VxWorks users, for providing 
the following missing bits of information:

- How does taskName() behave when passed a null task id? Is it equivalent to 
specifying taskIdSelf(), or does it lead to a NULL error return?

- How does msgQSend() behave when passed an invalid message priority, i.e. neither 
MSG_PRI_NORMAL nor MSG_PRI_URGENT?

- How does taskInit() behave when passed an invalid set of task options? Are the 
invalid flags ignored, or does the routine return an error status?

If you happen to have a VxWorks target at hand regardless of the architecture, and 
are willing to help improving the behavioural correctness of the VxWorks skin, 
then your input will be most welcome.

-- 

Philippe.