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123 lines
4.1 KiB
C++
123 lines
4.1 KiB
C++
/*
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Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
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This file is part of libzmq, the ZeroMQ core engine in C++.
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libzmq 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 (LGPL) as published
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by 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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As a special exception, the Contributors give you permission to link
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this library with independent modules to produce an executable,
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regardless of the license terms of these independent modules, and to
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copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the
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terms and conditions of the license of that module. An independent
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module is a module which is not derived from or based on this library.
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If you modify this library, you must extend this exception to your
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version of the library.
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libzmq is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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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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#ifndef __ZMQ_XPUB_HPP_INCLUDED__
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#define __ZMQ_XPUB_HPP_INCLUDED__
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#include <deque>
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#include <string>
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#include "socket_base.hpp"
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#include "session_base.hpp"
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#include "mtrie.hpp"
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#include "array.hpp"
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#include "dist.hpp"
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namespace zmq
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{
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class ctx_t;
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class msg_t;
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class pipe_t;
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class io_thread_t;
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class xpub_t : public socket_base_t
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{
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public:
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xpub_t (zmq::ctx_t *parent_, uint32_t tid_, int sid_);
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~xpub_t ();
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// Implementations of virtual functions from socket_base_t.
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void xattach_pipe (zmq::pipe_t *pipe_, bool subscribe_to_all_ = false);
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int xsend (zmq::msg_t *msg_);
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bool xhas_out ();
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int xrecv (zmq::msg_t *msg_);
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bool xhas_in ();
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void xread_activated (zmq::pipe_t *pipe_);
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void xwrite_activated (zmq::pipe_t *pipe_);
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int xsetsockopt (int option_, const void *optval_, size_t optvallen_);
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void xpipe_terminated (zmq::pipe_t *pipe_);
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private:
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// Function to be applied to the trie to send all the subscriptions
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// upstream.
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static void send_unsubscription (zmq::mtrie_t::prefix_t data_,
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size_t size_,
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xpub_t *self_);
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// Function to be applied to each matching pipes.
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static void mark_as_matching (zmq::pipe_t *pipe_, xpub_t *arg_);
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// List of all subscriptions mapped to corresponding pipes.
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mtrie_t subscriptions;
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// List of manual subscriptions mapped to corresponding pipes.
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mtrie_t manual_subscriptions;
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// Distributor of messages holding the list of outbound pipes.
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dist_t dist;
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// If true, send all subscription messages upstream, not just
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// unique ones
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bool verbose_subs;
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// If true, send all unsubscription messages upstream, not just
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// unique ones
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bool verbose_unsubs;
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// True if we are in the middle of sending a multi-part message.
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bool more;
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// Drop messages if HWM reached, otherwise return with EAGAIN
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bool lossy;
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// Subscriptions will not bed added automatically, only after calling set option with ZMQ_SUBSCRIBE or ZMQ_UNSUBSCRIBE
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bool manual;
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// Last pipe that sent subscription message, only used if xpub is on manual
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pipe_t *last_pipe;
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// Pipes that sent subscriptions messages that have not yet been processed, only used if xpub is on manual
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std::deque<pipe_t *> pending_pipes;
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// Welcome message to send to pipe when attached
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msg_t welcome_msg;
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// List of pending (un)subscriptions, ie. those that were already
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// applied to the trie, but not yet received by the user.
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std::deque<blob_t> pending_data;
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std::deque<metadata_t *> pending_metadata;
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std::deque<unsigned char> pending_flags;
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xpub_t (const xpub_t &);
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const xpub_t &operator= (const xpub_t &);
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};
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}
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#endif
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