reset_unblock_function   98 thread.c       static void reset_unblock_function(rb_thread_t *th, const struct rb_unblock_callback *old);
reset_unblock_function  973 thread.c           reset_unblock_function(th, &region->oldubf);
reset_unblock_function 3057 thread.c       	    reset_unblock_function(th, &oldubf);