Ruby

Merge commit r32846:
* thread_pthread.c (native_cond_signal): retry to call pthread_cond_signal
and pthread_cond_broadcast if they return EAGAIN in
native_cond_signal and native_cond_broadcast, respectively.
It is for the pthread implementation of Mac OS X 10.7 (Lion).
fixes #5155. [ruby-dev:44342].
* thread_pthread.c (native_cond_broadcast): ditto.
* thread_pthread.c (struct cached_thread_entry): stop using
pthread_cond_t and its functions directly.
* thread_pthread.c (register_cached_thread_and_wait): ditto.
* thread_pthread.c (use_cached_thread): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@32853 b2dd03c8-39d4-4d8f-98ff-823fe69b080e