From a15854bd92db69fcd0b4444fe1b8fe3610a7acf6 Mon Sep 17 00:00:00 2001 From: Martin Lucina Date: Mon, 23 Jan 2012 08:53:19 +0100 Subject: Imported Upstream version 2.0.7.dfsg --- src/pub.cpp | 177 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 177 insertions(+) create mode 100644 src/pub.cpp (limited to 'src/pub.cpp') diff --git a/src/pub.cpp b/src/pub.cpp new file mode 100644 index 0000000..4e73b19 --- /dev/null +++ b/src/pub.cpp @@ -0,0 +1,177 @@ +/* + Copyright (c) 2007-2010 iMatix Corporation + + This file is part of 0MQ. + + 0MQ is free software; you can redistribute it and/or modify it under + the terms of the Lesser GNU 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 + Lesser GNU General Public License for more details. + + You should have received a copy of the Lesser GNU General Public License + along with this program. If not, see . +*/ + +#include "../include/zmq.h" + +#include "pub.hpp" +#include "err.hpp" +#include "msg_content.hpp" +#include "pipe.hpp" + +zmq::pub_t::pub_t (class app_thread_t *parent_) : + socket_base_t (parent_), + active (0) +{ + options.requires_in = false; + options.requires_out = true; +} + +zmq::pub_t::~pub_t () +{ + for (pipes_t::size_type i = 0; i != pipes.size (); i++) + pipes [i]->term (); + pipes.clear (); +} + +void zmq::pub_t::xattach_pipes (class reader_t *inpipe_, + class writer_t *outpipe_, const blob_t &peer_identity_) +{ + zmq_assert (!inpipe_); + pipes.push_back (outpipe_); + pipes.swap (active, pipes.size () - 1); + active++; +} + +void zmq::pub_t::xdetach_inpipe (class reader_t *pipe_) +{ + zmq_assert (false); +} + +void zmq::pub_t::xdetach_outpipe (class writer_t *pipe_) +{ + // Remove the pipe from the list; adjust number of active pipes + // accordingly. + if (pipes.index (pipe_) < active) + active--; + pipes.erase (pipe_); +} + +void zmq::pub_t::xkill (class reader_t *pipe_) +{ + zmq_assert (false); +} + +void zmq::pub_t::xrevive (class reader_t *pipe_) +{ + zmq_assert (false); +} + +void zmq::pub_t::xrevive (class writer_t *pipe_) +{ + // Move the pipe to the list of active pipes. + pipes.swap (pipes.index (pipe_), active); + active++; +} + +int zmq::pub_t::xsetsockopt (int option_, const void *optval_, + size_t optvallen_) +{ + errno = EINVAL; + return -1; +} + +int zmq::pub_t::xsend (zmq_msg_t *msg_, int flags_) +{ + // If there are no active pipes available, simply drop the message. + if (active == 0) { + int rc = zmq_msg_close (msg_); + zmq_assert (rc == 0); + rc = zmq_msg_init (msg_); + zmq_assert (rc == 0); + return 0; + } + + msg_content_t *content = (msg_content_t*) msg_->content; + + // For VSMs the copying is straighforward. + if (content == (msg_content_t*) ZMQ_VSM) { + for (pipes_t::size_type i = 0; i != active;) + if (write (pipes [i], msg_)) + i++; + int rc = zmq_msg_init (msg_); + zmq_assert (rc == 0); + return 0; + } + + // Optimisation for the case when there's only a single pipe + // to send the message to - no refcount adjustment i.e. no atomic + // operations are needed. + if (active == 1) { + if (!write (pipes [0], msg_)) { + int rc = zmq_msg_close (msg_); + zmq_assert (rc == 0); + } + int rc = zmq_msg_init (msg_); + zmq_assert (rc == 0); + return 0; + } + + // There are at least 2 destinations for the message. That means we have + // to deal with reference counting. First add N-1 references to + // the content (we are holding one reference anyway, that's why -1). + if (msg_->flags & ZMQ_MSG_SHARED) + content->refcnt.add (active - 1); + else { + content->refcnt.set (active); + msg_->flags |= ZMQ_MSG_SHARED; + } + + // Push the message to all destinations. + for (pipes_t::size_type i = 0; i != active;) { + if (!write (pipes [i], msg_)) + content->refcnt.sub (1); + else + i++; + } + + // Detach the original message from the data buffer. + int rc = zmq_msg_init (msg_); + zmq_assert (rc == 0); + + return 0; +} + +int zmq::pub_t::xrecv (zmq_msg_t *msg_, int flags_) +{ + errno = ENOTSUP; + return -1; +} + +bool zmq::pub_t::xhas_in () +{ + return false; +} + +bool zmq::pub_t::xhas_out () +{ + return true; +} + +bool zmq::pub_t::write (class writer_t *pipe_, zmq_msg_t *msg_) +{ + if (!pipe_->write (msg_)) { + active--; + pipes.swap (pipes.index (pipe_), active); + return false; + } + if (!(msg_->flags & ZMQ_MSG_MORE)) + pipe_->flush (); + return true; +} + -- cgit v1.2.3