deischen ba84b16ebb Add cancellation point to sem_wait() and sem_timedwait() for pshared
semaphores.  Also add cancellation cleanup handlers to keep semaphores
in a consistent state.

Submitted in part by:	davidxu
Reviewed by:		davidxu
2004-02-06 15:20:56 +00:00
..
2004-02-05 02:55:20 +00:00