rb_mutex_lock     902 include/ruby/intern.h VALUE rb_mutex_lock(VALUE mutex);
rb_mutex_lock    4360 thread.c           rb_mutex_lock((VALUE)DATA_PTR(thread_shield));
rb_mutex_lock    4382 thread.c           rb_mutex_lock(mutex);
rb_mutex_lock     447 thread_sync.c  	rb_ensure(rb_mutex_sleep_forever, Qnil, rb_mutex_lock, self);
rb_mutex_lock     450 thread_sync.c  	rb_ensure(rb_mutex_wait_for, (VALUE)&t, rb_mutex_lock, self);
rb_mutex_lock     490 thread_sync.c      rb_mutex_lock(mutex);
rb_mutex_lock    1245 thread_sync.c      rb_define_method(rb_cMutex, "lock", rb_mutex_lock, 0);