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authorMicah Anderson <micah@riseup.net>2014-08-11 16:30:52 -0400
committerMicah Anderson <micah@riseup.net>2014-08-11 16:30:52 -0400
commit686958a9db9b140c9665af8fd001e7032a37a46e (patch)
treec0f1a7b4f7d1ffc12ce54271da73edefee18e5b6 /src/pair.cpp
initial debian package import
Diffstat (limited to 'src/pair.cpp')
-rw-r--r--src/pair.cpp119
1 files changed, 119 insertions, 0 deletions
diff --git a/src/pair.cpp b/src/pair.cpp
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+++ b/src/pair.cpp
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+/*
+ Copyright (c) 2007-2013 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_, int sid_) :
+ socket_base_t (parent_, tid_, sid_),
+ pipe (NULL)
+{
+ options.type = ZMQ_PAIR;
+}
+
+zmq::pair_t::~pair_t ()
+{
+ zmq_assert (!pipe);
+}
+
+void zmq::pair_t::xattach_pipe (pipe_t *pipe_, bool subscribe_to_all_)
+{
+ // subscribe_to_all_ is unused
+ (void)subscribe_to_all_;
+
+ zmq_assert (pipe_ != NULL);
+
+ // ZMQ_PAIR socket can only be connected to a single peer.
+ // The socket rejects any further connection requests.
+ if (pipe == NULL)
+ pipe = pipe_;
+ else
+ pipe_->terminate (false);
+}
+
+void zmq::pair_t::xpipe_terminated (pipe_t *pipe_)
+{
+ if (pipe_ == pipe)
+ pipe = NULL;
+}
+
+void zmq::pair_t::xread_activated (pipe_t *)
+{
+ // 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 *)
+{
+ // 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_)
+{
+ if (!pipe || !pipe->write (msg_)) {
+ errno = EAGAIN;
+ return -1;
+ }
+
+ if (!(msg_->flags () & msg_t::more))
+ 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_)
+{
+ // 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;
+
+ return pipe->check_write ();
+}