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8620c3e032
Of course people still "can" distributed the sources under the LGPLv3. However we provide COPYING.LESSER with additional grants. Solution: specify these grants in the header of each source file.
134 lines
3.8 KiB
C++
134 lines
3.8 KiB
C++
/*
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Copyright (c) 2007-2015 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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#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_, int sid_) :
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router_t (parent_, tid_, sid_),
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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_)
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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 ? true : false;
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// Push message to the reply pipe.
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int rc = router_t::xsend (msg_);
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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_)
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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 = router_t::xrecv (msg_);
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if (rc != 0)
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return rc;
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if ((msg_->flags () & msg_t::more)) {
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// Empty message part delimits the traceback stack.
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bool bottom = (msg_->size () == 0);
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// Push it to the reply pipe.
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rc = router_t::xsend (msg_);
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errno_assert (rc == 0);
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if (bottom)
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break;
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}
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else {
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// If the traceback stack is malformed, discard anything
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// already sent to pipe (we're at end of invalid message).
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rc = router_t::rollback ();
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errno_assert (rc == 0);
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}
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}
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request_begins = false;
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}
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// Get next message part to return to the user.
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int rc = router_t::xrecv (msg_);
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if (rc != 0)
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return rc;
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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 router_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 router_t::xhas_out ();
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}
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