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113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
/*
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Copyright (c) 2007-2011 iMatix Corporation
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Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
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This file is part of 0MQ.
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0MQ 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 as published by
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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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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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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/>.
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*/
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#include "rep.hpp"
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#include "err.hpp"
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#include "msg.hpp"
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zmq::rep_t::rep_t (class ctx_t *parent_, uint32_t tid_) :
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xrep_t (parent_, tid_),
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sending_reply (false),
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request_begins (true)
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{
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options.type = ZMQ_REP;
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}
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zmq::rep_t::~rep_t ()
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{
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}
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int zmq::rep_t::xsend (msg_t *msg_, int flags_)
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{
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// If we are in the middle of receiving a request, we cannot send reply.
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if (!sending_reply) {
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errno = EFSM;
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return -1;
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}
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bool more = msg_->flags () & (msg_t::more | msg_t::label) ? true : false;
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// Push message to the reply pipe.
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int rc = xrep_t::xsend (msg_, flags_);
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if (rc != 0)
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return rc;
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// If the reply is complete flip the FSM back to request receiving state.
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if (!more)
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sending_reply = false;
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return 0;
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}
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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.
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if (sending_reply) {
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errno = EFSM;
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return -1;
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}
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// First thing to do when receiving a request is to copy all the labels
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// to the reply pipe.
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if (request_begins) {
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while (true) {
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int rc = xrep_t::xrecv (msg_, flags_);
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if (rc != 0)
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return rc;
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if (!(msg_->flags () & msg_t::label))
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break;
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rc = xrep_t::xsend (msg_, flags_);
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errno_assert (rc == 0);
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}
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request_begins = false;
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}
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else {
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int rc = xrep_t::xrecv (msg_, flags_);
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if (rc != 0)
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return rc;
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}
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zmq_assert (!(msg_->flags () & msg_t::label));
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// If whole request is read, flip the FSM to reply-sending state.
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if (!(msg_->flags () & msg_t::more)) {
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sending_reply = true;
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request_begins = true;
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}
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return 0;
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}
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bool zmq::rep_t::xhas_in ()
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{
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if (sending_reply)
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return false;
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return xrep_t::xhas_in ();
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}
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bool zmq::rep_t::xhas_out ()
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{
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if (!sending_reply)
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return false;
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return xrep_t::xhas_out ();
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}
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