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