rb_mutex_lock     709 include/ruby/intern.h VALUE rb_mutex_lock(VALUE mutex);
rb_mutex_lock    3189 thread.c       	rb_ensure(rb_mutex_sleep_forever, Qnil, rb_mutex_lock, self);
rb_mutex_lock    3192 thread.c       	rb_ensure(rb_mutex_wait_for, (VALUE)&t, rb_mutex_lock, self);
rb_mutex_lock    3226 thread.c           rb_mutex_lock(mutex);
rb_mutex_lock    3243 thread.c           rb_mutex_lock((VALUE)DATA_PTR(barrier));
rb_mutex_lock    3256 thread.c           rb_mutex_lock(mutex);
rb_mutex_lock    3761 thread.c           rb_define_method(rb_cMutex, "lock", rb_mutex_lock, 0);