Method copy

contrib/libs/zeromq/src/msg.cpp:326–362

}

int zmq::msg_t::copy (msg_t &src_)
{
    //  Check the validity of the source.
    if (unlikely (!src_.check ())) {
        errno = EFAULT;
        return -1;
    }

    const int rc = close ();
    if (unlikely (rc < 0))
        return rc;

    // The initial reference count, when a non-shared message is initially
    // shared (between the original and the copy we create here).
    const atomic_counter_t::integer_t initial_shared_refcnt = 2;

    if (src_.is_lmsg () || src_.is_zcmsg ()) {
        //  One reference is added to shared messages. Non-shared messages
        //  are turned into shared messages.
        if (src_.flags () & msg_t::shared)
            src_.refcnt ()->add (1);
        else {
            src_.set_flags (msg_t::shared);
            src_.refcnt ()->set (initial_shared_refcnt);
        }
    }

    if (src_._u.base.metadata != NULL)
        src_._u.base.metadata->add_ref ();

    if (src_._u.base.group.type == group_type_long)
        src_._u.base.group.lgroup.content->refcnt.add (1);

    *this = src_;

    return 0;
}

void *zmq::msg_t::data ()
{