Attilio Rao b13c5f2883 rwlock implemented from libthr need to fall through the 'hard path' and ... query umtx also if the shared waiters bit is set on a shared lock. The writer starvation avoidance technique, infact, can lead to shared waiters on a shared lock which can bring to a missed wakeup and thus to a deadlock if the right bit is not checked (a notable case is the writers counterpart to be handled through expired timeouts). Fix that by checking for the shared waiters bit also when unlocking the shared locks. That bug was causing a reported MySQL deadlock. Many thanks go to Nick Esborn and his employer DesertNet which provided time and machines to identify and fix this issue. PR: thread/135673 Reported by: Nick Esborn <nick at desert dot net> Tested by: Nick Esborn <nick at desert dot net> Reviewed by: jeff		2009-09-23 21:38:57 +00:00
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arch	Commit missing mips libthr support that I thought I'd committed earlier	2008-05-11 05:54:52 +00:00
support	Use thr_new syscall to create a new thread, obscure context operations	2005-04-23 02:48:59 +00:00
sys	__error could be called too early before libthr is initialized, test	2006-07-12 03:44:05 +00:00
thread	rwlock implemented from libthr need to fall through the 'hard path' and	2009-09-23 21:38:57 +00:00
libthr.3	- Stop calling libthr alternative as it's now the default	2007-10-22 10:13:38 +00:00
Makefile	Turn on nodelete linker flag because libthr can not be unloaded safely,	2009-03-31 02:50:18 +00:00
pthread.map	Make pthread_cleanup_push() and pthread_cleanup_pop() as a pair of macros,	2008-06-09 01:14:10 +00:00