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118 lines
3.6 KiB
C++
118 lines
3.6 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_REQ_HPP_INCLUDED__
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#define __ZMQ_REQ_HPP_INCLUDED__
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#include "dealer.hpp"
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#include "stdint.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 io_thread_t;
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class socket_base_t;
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class req_t : public dealer_t
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{
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public:
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req_t (zmq::ctx_t *parent_, uint32_t tid_, int sid_);
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~req_t ();
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// Overrides of functions from socket_base_t.
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int xsend (zmq::msg_t *msg_);
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int xrecv (zmq::msg_t *msg_);
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bool xhas_in ();
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bool xhas_out ();
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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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protected:
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// Receive only from the pipe the request was sent to, discarding
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// frames from other pipes.
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int recv_reply_pipe (zmq::msg_t *msg_);
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private:
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// If true, request was already sent and reply wasn't received yet or
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// was received partially.
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bool _receiving_reply;
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// If true, we are starting to send/recv a message. The first part
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// of the message must be empty message part (backtrace stack bottom).
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bool _message_begins;
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// The pipe the request was sent to and where the reply is expected.
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zmq::pipe_t *_reply_pipe;
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// Whether request id frames shall be sent and expected.
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bool _request_id_frames_enabled;
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// The current request id. It is incremented every time before a new
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// request is sent.
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uint32_t _request_id;
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// If false, send() will reset its internal state and terminate the
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// reply_pipe's connection instead of failing if a previous request is
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// still pending.
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bool _strict;
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req_t (const req_t &);
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const req_t &operator= (const req_t &);
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};
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class req_session_t : public session_base_t
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{
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public:
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req_session_t (zmq::io_thread_t *io_thread_,
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bool connect_,
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zmq::socket_base_t *socket_,
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const options_t &options_,
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address_t *addr_);
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~req_session_t ();
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// Overrides of the functions from session_base_t.
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int push_msg (msg_t *msg_);
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void reset ();
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private:
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enum
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{
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bottom,
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request_id,
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body
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} _state;
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req_session_t (const req_session_t &);
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const req_session_t &operator= (const req_session_t &);
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};
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}
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#endif
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