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Philippe Gerum authored
The fast path in rtdm_mutex_timedlock() was terminally broken by the not-so-recent addition of fast locks to RTDM-based kernel mutexes. As a matter of fact, the xnthread_try_grab() helper suffered multiple breakages, including the lack of update to the underlying fastlock word to reflect a successful locking operation. To this end, we introduce xnsynch_try_acquire() which properly attempts to grab the requested mutex on behalf of the current thread, and call it as a drop-in replacement for xnthread_try_grab(). Callers fall back to xnsynch_acquire() on failure to put a fast grab on the mutex.
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