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e46ec31209
The get_credential () member function returns credential for the last peer we received message for. The idea is that this function is used to implement user-level API.
132 lines
3.0 KiB
C++
132 lines
3.0 KiB
C++
/*
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Copyright (c) 2007-2014 Contributors as noted in the AUTHORS file
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This file is part of 0MQ.
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0MQ is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "pair.hpp"
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#include "err.hpp"
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#include "pipe.hpp"
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#include "msg.hpp"
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zmq::pair_t::pair_t (class ctx_t *parent_, uint32_t tid_, int sid_) :
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socket_base_t (parent_, tid_, sid_),
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pipe (NULL),
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last_in (NULL)
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{
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options.type = ZMQ_PAIR;
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}
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zmq::pair_t::~pair_t ()
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{
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zmq_assert (!pipe);
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}
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void zmq::pair_t::xattach_pipe (pipe_t *pipe_, bool subscribe_to_all_)
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{
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// subscribe_to_all_ is unused
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(void)subscribe_to_all_;
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zmq_assert (pipe_ != NULL);
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// ZMQ_PAIR socket can only be connected to a single peer.
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// The socket rejects any further connection requests.
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if (pipe == NULL)
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pipe = pipe_;
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else
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pipe_->terminate (false);
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}
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void zmq::pair_t::xpipe_terminated (pipe_t *pipe_)
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{
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if (pipe_ == pipe) {
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if (last_in == pipe) {
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saved_credential = last_in->get_credential ();
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last_in = NULL;
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}
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pipe = NULL;
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}
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}
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void zmq::pair_t::xread_activated (pipe_t *)
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{
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// There's just one pipe. No lists of active and inactive pipes.
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// There's nothing to do here.
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}
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void zmq::pair_t::xwrite_activated (pipe_t *)
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{
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// There's just one pipe. No lists of active and inactive pipes.
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// There's nothing to do here.
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}
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int zmq::pair_t::xsend (msg_t *msg_)
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{
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if (!pipe || !pipe->write (msg_)) {
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errno = EAGAIN;
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return -1;
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}
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if (!(msg_->flags () & msg_t::more))
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pipe->flush ();
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// Detach the original message from the data buffer.
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int rc = msg_->init ();
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errno_assert (rc == 0);
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return 0;
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}
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int zmq::pair_t::xrecv (msg_t *msg_)
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{
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// Deallocate old content of the message.
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int rc = msg_->close ();
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errno_assert (rc == 0);
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if (!pipe || !pipe->read (msg_)) {
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// Initialise the output parameter to be a 0-byte message.
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rc = msg_->init ();
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errno_assert (rc == 0);
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errno = EAGAIN;
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return -1;
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}
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last_in = pipe;
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return 0;
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}
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bool zmq::pair_t::xhas_in ()
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{
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if (!pipe)
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return false;
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return pipe->check_read ();
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}
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bool zmq::pair_t::xhas_out ()
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{
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if (!pipe)
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return false;
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return pipe->check_write ();
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}
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zmq::blob_t zmq::pair_t::get_credential () const
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{
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return last_in? last_in->get_credential (): saved_credential;
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}
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