libzmq/src/xsub.cpp

/*
    Copyright (c) 2007-2011 iMatix Corporation
    Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file

    This file is part of 0MQ.

    0MQ is free software; you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    0MQ is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <string.h>

#include "xsub.hpp"
#include "err.hpp"

zmq::xsub_t::xsub_t (class ctx_t *parent_, uint32_t tid_) :
    socket_base_t (parent_, tid_)
{
    options.type = ZMQ_XSUB;
}

zmq::xsub_t::~xsub_t ()
{
}

void zmq::xsub_t::xattach_pipe (pipe_t *pipe_, const blob_t &peer_identity_)
{
    zmq_assert (pipe_);
    fq.attach (pipe_);
}

void zmq::xsub_t::xread_activated (pipe_t *pipe_)
{
    fq.activated (pipe_);
}

void zmq::xsub_t::xterminated (pipe_t *pipe_)
{
    fq.terminated (pipe_);
}

int zmq::xsub_t::xsend (msg_t *msg_, int options_)
{
    //  TODO: Once we'll send the subscription upstream here. For now
    //  just empty the message.
    int rc = msg_->close ();
    errno_assert (rc == 0);
    rc = msg_->init ();
    errno_assert (rc == 0);
    return 0;
}

bool zmq::xsub_t::xhas_out ()
{
    //  Subscription can be added/removed anytime.
    return true;
}

int zmq::xsub_t::xrecv (class msg_t *msg_, int flags_)
{
    return fq.recv (msg_, flags_);
}

bool zmq::xsub_t::xhas_in ()
{
    return fq.has_in ();
}