rb_mutex_unlock   903 include/ruby/intern.h VALUE rb_mutex_unlock(VALUE mutex);
rb_mutex_unlock  4385 thread.c           rb_mutex_unlock(mutex);
rb_mutex_unlock  4405 thread.c           rb_mutex_unlock(mutex);
rb_mutex_unlock  4417 thread.c           rb_mutex_unlock(mutex);
rb_mutex_unlock   444 thread_sync.c      rb_mutex_unlock(self);
rb_mutex_unlock   491 thread_sync.c      return rb_ensure(func, arg, rb_mutex_unlock, mutex);
rb_mutex_unlock  1246 thread_sync.c      rb_define_method(rb_cMutex, "unlock", rb_mutex_unlock, 0);