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/*
Copyright (c) 2007-2009 FastMQ Inc.
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 <http://www.gnu.org/licenses/>.
*/
#ifndef __ZMQ_REQ_INCLUDED__
#define __ZMQ_REQ_INCLUDED__
#include "socket_base.hpp"
#include "yarray.hpp"
namespace zmq
{
class req_t : public socket_base_t
{
public:
req_t (class app_thread_t *parent_);
~req_t ();
// Overloads of functions from socket_base_t.
void xattach_pipes (class reader_t *inpipe_, class writer_t *outpipe_);
void xdetach_inpipe (class reader_t *pipe_);
void xdetach_outpipe (class writer_t *pipe_);
void xkill (class reader_t *pipe_);
void xrevive (class reader_t *pipe_);
int xsetsockopt (int option_, const void *optval_, size_t optvallen_);
int xsend (zmq_msg_t *msg_, int flags_);
int xflush ();
int xrecv (zmq_msg_t *msg_, int flags_);
private:
// List in outbound and inbound pipes. Note that the two lists are
// always in sync. I.e. outpipe with index N communicates with the
// same session as inpipe with index N.
//
// TODO: Once we have queue limits in place, list of active outpipes
// is to be held (presumably by stacking active outpipes at
// the beginning of the array). We don't have to do the same thing for
// inpipes, because we know which pipe we want to read the
// reply from.
typedef yarray_t <class writer_t> out_pipes_t;
out_pipes_t out_pipes;
typedef yarray_t <class reader_t> in_pipes_t;
in_pipes_t in_pipes;
// Req_t load-balances the requests - 'current' points to the session
// that's processing the request at the moment.
out_pipes_t::size_type current;
// If true, request was already sent and reply wasn't received yet.
bool waiting_for_reply;
// True, if read can be attempted from the reply pipe.
bool reply_pipe_active;
// Pipe we are awaiting the reply from.
class reader_t *reply_pipe;
req_t (const req_t&);
void operator = (const req_t&);
};
}
#endif
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