rb_mutex_unlock   710 include/ruby/intern.h VALUE rb_mutex_unlock(VALUE mutex);
rb_mutex_unlock  3186 thread.c           rb_mutex_unlock(self);
rb_mutex_unlock  3227 thread.c           return rb_ensure(func, arg, rb_mutex_unlock, mutex);
rb_mutex_unlock  3258 thread.c           rb_mutex_unlock(mutex);
rb_mutex_unlock  3265 thread.c           return rb_mutex_unlock((VALUE)DATA_PTR(self));
rb_mutex_unlock  3273 thread.c           return rb_mutex_unlock(mutex);
rb_mutex_unlock  3762 thread.c           rb_define_method(rb_cMutex, "unlock", rb_mutex_unlock, 0);