enclosed?

/*
 *  call-seq:
 *     thgrp.enclosed?   => true or false
 *  
 *  Returns <code>true</code> if <em>thgrp</em> is enclosed. See also
 *  ThreadGroup#enclose.
 */

static VALUE
thgroup_enclosed_p(group)
    VALUE group;
{
    struct thgroup *data;

    Data_Get_Struct(group, struct thgroup, data);
    if (data->enclosed) return Qtrue;
    return Qfalse;
}