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https://github.com/zeromq/libzmq.git
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6a18f59532
icanhasall is cute (for now), but the effect of the variable is clear only after tracking down its origin reading the commit. This change is intended to make it easier for people to have some intuition about its effect from its name.
120 lines
2.7 KiB
C++
120 lines
2.7 KiB
C++
/*
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Copyright (c) 2007-2013 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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{
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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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pipe = NULL;
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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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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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