stop?

/*
 *  call-seq:
 *     thr.stop?   => true or false
 *  
 *  Returns <code>true</code> if <i>thr</i> is dead or sleeping.
 *     
 *     a = Thread.new { Thread.stop }
 *     b = Thread.current
 *     a.stop?   #=> true
 *     b.stop?   #=> false
 */

static VALUE
rb_thread_stop_p(thread)
    VALUE thread;
{
    rb_thread_t th = rb_thread_check(thread);

    if (rb_thread_dead(th)) return Qtrue;
    if (th->status == THREAD_STOPPED) return Qtrue;
    return Qfalse;
}