rb_signal_buff_size   72 thread.c       int rb_signal_buff_size(void);
rb_signal_buff_size 1184 thread.c       	while (rb_signal_buff_size() && !th->exec_signal) native_thread_yield();
rb_signal_buff_size  756 thread_pthread.c 	    if (rb_signal_buff_size() == 0) break;