alive?

/*
 *  call-seq:
 *     thr.alive?   => true or false
 *  
 *  Returns <code>true</code> if <i>thr</i> is running or sleeping.
 *     
 *     thr = Thread.new { }
 *     thr.join                #=> #<Thread:0x401b3fb0 dead>
 *     Thread.current.alive?   #=> true
 *     thr.alive?              #=> false
 */

VALUE
rb_thread_alive_p(thread)
    VALUE thread;
{
    rb_thread_t th = rb_thread_check(thread);

    if (rb_thread_dead(th)) return Qfalse;
    return Qtrue;
}