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https://github.com/VCMP-SqMod/SqMod.git
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121 lines
3.9 KiB
C++
121 lines
3.9 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_XSUB_HPP_INCLUDED__
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#define __ZMQ_XSUB_HPP_INCLUDED__
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#include "socket_base.hpp"
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#include "session_base.hpp"
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#include "dist.hpp"
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#include "fq.hpp"
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#ifdef ZMQ_USE_RADIX_TREE
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#include "radix_tree.hpp"
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#else
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#include "trie.hpp"
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#endif
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namespace zmq
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{
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class ctx_t;
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class pipe_t;
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class io_thread_t;
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class xsub_t : public socket_base_t
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{
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public:
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xsub_t (zmq::ctx_t *parent_, uint32_t tid_, int sid_);
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~xsub_t () ZMQ_OVERRIDE;
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protected:
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// Overrides of functions from socket_base_t.
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void xattach_pipe (zmq::pipe_t *pipe_,
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bool subscribe_to_all_,
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bool locally_initiated_) ZMQ_FINAL;
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int xsetsockopt (int option_,
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const void *optval_,
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size_t optvallen_) ZMQ_OVERRIDE;
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int xsend (zmq::msg_t *msg_) ZMQ_OVERRIDE;
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bool xhas_out () ZMQ_OVERRIDE;
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int xrecv (zmq::msg_t *msg_) ZMQ_FINAL;
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bool xhas_in () ZMQ_FINAL;
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void xread_activated (zmq::pipe_t *pipe_) ZMQ_FINAL;
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void xwrite_activated (zmq::pipe_t *pipe_) ZMQ_FINAL;
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void xhiccuped (pipe_t *pipe_) ZMQ_FINAL;
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void xpipe_terminated (zmq::pipe_t *pipe_) ZMQ_FINAL;
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private:
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// Check whether the message matches at least one subscription.
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bool match (zmq::msg_t *msg_);
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// Function to be applied to the trie to send all the subsciptions
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// upstream.
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static void
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send_subscription (unsigned char *data_, size_t size_, void *arg_);
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// Fair queueing object for inbound pipes.
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fq_t _fq;
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// Object for distributing the subscriptions upstream.
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dist_t _dist;
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// The repository of subscriptions.
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#ifdef ZMQ_USE_RADIX_TREE
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radix_tree_t _subscriptions;
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#else
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trie_t _subscriptions;
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#endif
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// If true, 'message' contains a matching message to return on the
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// next recv call.
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bool _has_message;
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msg_t _message;
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// If true, part of a multipart message was already sent, but
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// there are following parts still waiting.
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bool _more_send;
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// If true, part of a multipart message was already received, but
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// there are following parts still waiting.
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bool _more_recv;
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// If true, subscribe and cancel messages are processed for the rest
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// of multipart message.
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bool _process_subscribe;
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// This option is enabled with ZMQ_ONLY_FIRST_SUBSCRIBE.
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// If true, messages following subscribe/unsubscribe in a multipart
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// message are treated as user data regardless of the first byte.
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bool _only_first_subscribe;
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ZMQ_NON_COPYABLE_NOR_MOVABLE (xsub_t)
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};
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}
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#endif
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