Daniel Eischen fd626336fd Add a method of yielding the current thread with the scheduler ... lock held (_thr_sched_switch_unlocked()) and use this to avoid dropping the scheduler lock and having the scheduler retake the same lock again. Add a better way of detecting if a low-level lock is in use. When switching out a thread due to blocking in the UTS, don't switch to the KSE's scheduler stack only to switch back to another thread. If possible switch to the new thread directly from the old thread and avoid the overhead of the extra context switch. Check for pending signals on a thread when entering the scheduler and add them to the threads signal frame. This includes some other minor signal fixes. Most of this was a joint effor between davidxu and myself. Reviewed by: davidxu Approved by: re@ (blanket for libpthread)		2003-05-16 19:58:30 +00:00
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lock.c	Add a method of yielding the current thread with the scheduler	2003-05-16 19:58:30 +00:00
lock.h	Add a method of yielding the current thread with the scheduler	2003-05-16 19:58:30 +00:00
Makefile.inc	Add FIFO queueing locking operations based on atomic swap.	2003-04-18 05:02:39 +00:00
thr_error.c	Protect thread errno from being changed while operating	2003-04-23 21:46:50 +00:00