static void detach_spies(struct ast_channel *chan)
{
        struct ast_channel_spy *spy;

        if (!chan->spies)
                return;

        /* Marking the spies as done is sufficient.  Chanspy or spy users will get the picture. */
        AST_LIST_TRAVERSE(&chan->spies->list, spy, list) {
                ast_mutex_lock(&spy->lock);
                if (spy->status == CHANSPY_RUNNING)
                        spy->status = CHANSPY_DONE;
                if (ast_test_flag(spy, CHANSPY_TRIGGER_MODE) != CHANSPY_TRIGGER_NONE)
                        ast_cond_signal(&spy->trigger);
                ast_mutex_unlock(&spy->lock);
        }

        AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->spies->list, spy, list)
                ast_channel_spy_remove(chan, spy);
        AST_LIST_TRAVERSE_SAFE_END;
}