libzmq/src/rep.cpp

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/*
Copyright (c) 2007-2011 iMatix Corporation
Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
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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
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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.
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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/>.
*/
#include "rep.hpp"
#include "err.hpp"
#include "msg.hpp"
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zmq::rep_t::rep_t (class ctx_t *parent_, uint32_t tid_) :
xrep_t (parent_, tid_),
sending_reply (false),
request_begins (true)
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{
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options.type = ZMQ_REP;
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}
zmq::rep_t::~rep_t ()
{
}
int zmq::rep_t::xsend (msg_t *msg_, int flags_)
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{
// If we are in the middle of receiving a request, we cannot send reply.
if (!sending_reply) {
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errno = EFSM;
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return -1;
}
bool more = msg_->flags () & (msg_t::more | msg_t::label) ? true : false;
// Push message to the reply pipe.
int rc = xrep_t::xsend (msg_, flags_);
if (rc != 0)
return rc;
// If the reply is complete flip the FSM back to request receiving state.
if (!more)
sending_reply = false;
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return 0;
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}
int zmq::rep_t::xrecv (msg_t *msg_, int flags_)
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{
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// If we are in middle of sending a reply, we cannot receive next request.
if (sending_reply) {
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errno = EFSM;
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return -1;
}
// First thing to do when receiving a request is to copy all the labels
// to the reply pipe.
if (request_begins) {
while (true) {
int rc = xrep_t::xrecv (msg_, flags_);
if (rc != 0)
return rc;
if (!(msg_->flags () & msg_t::label))
break;
rc = xrep_t::xsend (msg_, flags_);
errno_assert (rc == 0);
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}
request_begins = false;
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}
else {
int rc = xrep_t::xrecv (msg_, flags_);
if (rc != 0)
return rc;
}
zmq_assert (!(msg_->flags () & msg_t::label));
// If whole request is read, flip the FSM to reply-sending state.
if (!(msg_->flags () & msg_t::more)) {
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sending_reply = true;
request_begins = true;
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}
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return 0;
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}
bool zmq::rep_t::xhas_in ()
{
if (sending_reply)
return false;
return xrep_t::xhas_in ();
}
bool zmq::rep_t::xhas_out ()
{
if (!sending_reply)
return false;
return xrep_t::xhas_out ();
}
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zmq::rep_session_t::rep_session_t (io_thread_t *io_thread_, bool connect_,
socket_base_t *socket_, const options_t &options_,
const char *protocol_, const char *address_) :
xrep_session_t (io_thread_, connect_, socket_, options_, protocol_,
address_)
{
}
zmq::rep_session_t::~rep_session_t ()
{
}