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/*
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 "pair.hpp"
#include "err.hpp"
#include "pipe.hpp"
#include "msg.hpp"
zmq::pair_t::pair_t (class ctx_t *parent_, uint32_t tid_) :
socket_base_t (parent_, tid_),
pipe (NULL)
{
options.type = ZMQ_PAIR;
}
zmq::pair_t::~pair_t ()
{
zmq_assert (!pipe);
}
void zmq::pair_t::xattach_pipe (pipe_t *pipe_)
{
zmq_assert (!pipe);
pipe = pipe_;
}
void zmq::pair_t::xterminated (pipe_t *pipe_)
{
zmq_assert (pipe_ == pipe);
pipe = NULL;
}
void zmq::pair_t::xread_activated (pipe_t *pipe_)
{
// There's just one pipe. No lists of active and inactive pipes.
// There's nothing to do here.
}
void zmq::pair_t::xwrite_activated (pipe_t *pipe_)
{
// There's just one pipe. No lists of active and inactive pipes.
// There's nothing to do here.
}
int zmq::pair_t::xsend (msg_t *msg_, int flags_)
{
if (!pipe || !pipe->write (msg_)) {
errno = EAGAIN;
return -1;
}
if (!(flags_ & ZMQ_SNDMORE))
pipe->flush ();
// Detach the original message from the data buffer.
int rc = msg_->init ();
errno_assert (rc == 0);
return 0;
}
int zmq::pair_t::xrecv (msg_t *msg_, int flags_)
{
// Deallocate old content of the message.
int rc = msg_->close ();
errno_assert (rc == 0);
if (!pipe || !pipe->read (msg_)) {
// Initialise the output parameter to be a 0-byte message.
rc = msg_->init ();
errno_assert (rc == 0);
errno = EAGAIN;
return -1;
}
return 0;
}
bool zmq::pair_t::xhas_in ()
{
if (!pipe)
return false;
return pipe->check_read ();
}
bool zmq::pair_t::xhas_out ()
{
if (!pipe)
return false;
msg_t msg;
int rc = msg.init ();
errno_assert (rc == 0);
bool result = pipe->check_write (&msg);
rc = msg.close ();
errno_assert (rc == 0);
return result;
}
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