frozen?

/*
 *  call-seq:
 *     obj.frozen?    => true or false
 *  
 *  Returns the freeze status of <i>obj</i>.
 *     
 *     a = [ "a", "b", "c" ]
 *     a.freeze    #=> ["a", "b", "c"]
 *     a.frozen?   #=> true
 */

static VALUE
rb_obj_frozen_p(obj)
    VALUE obj;
{
    if (OBJ_FROZEN(obj)) return Qtrue;
    return Qfalse;
}