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145 lines
3.9 KiB
C++
145 lines
3.9 KiB
C++
/*
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Copyright (c) 2007-2010 iMatix Corporation
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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 <new>
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#include "platform.hpp"
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#if defined ZMQ_HAVE_WINDOWS
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#include "windows.hpp"
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#else
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#include <sys/types.h>
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#include <unistd.h>
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#endif
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#include "zmq_connecter.hpp"
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#include "zmq_engine.hpp"
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#include "zmq_init.hpp"
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#include "io_thread.hpp"
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#include "err.hpp"
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zmq::zmq_connecter_t::zmq_connecter_t (class io_thread_t *io_thread_,
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class session_t *session_, const options_t &options_,
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const char *protocol_, const char *address_) :
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own_t (io_thread_, options_),
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io_object_t (io_thread_),
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handle_valid (false),
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wait (wait_before_connect),
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session (session_)
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{
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int rc = tcp_connecter.set_address (protocol_, address_);
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zmq_assert (rc == 0);
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}
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zmq::zmq_connecter_t::~zmq_connecter_t ()
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{
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if (wait)
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cancel_timer (reconnect_timer_id);
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if (handle_valid)
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rm_fd (handle);
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}
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int zmq::zmq_connecter_t::get_reconnect_ivl ()
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{
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#if defined ZMQ_HAVE_WINDOWS
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return (options.reconnect_ivl + (((int) GetCurrentProcessId () * 13)
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% options.reconnect_ivl));
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#else
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return (options.reconnect_ivl + (((int) getpid () * 13)
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% options.reconnect_ivl));
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#endif
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}
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void zmq::zmq_connecter_t::process_plug ()
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{
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if (wait)
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add_timer (get_reconnect_ivl (), reconnect_timer_id);
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else
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start_connecting ();
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}
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void zmq::zmq_connecter_t::in_event ()
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{
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// We are not polling for incomming data, so we are actually called
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// because of error here. However, we can get error on out event as well
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// on some platforms, so we'll simply handle both events in the same way.
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out_event ();
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}
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void zmq::zmq_connecter_t::out_event ()
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{
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fd_t fd = tcp_connecter.connect ();
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rm_fd (handle);
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handle_valid = false;
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// Handle the error condition by attempt to reconnect.
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if (fd == retired_fd) {
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tcp_connecter.close ();
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wait = true;
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add_timer (get_reconnect_ivl (), reconnect_timer_id);
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return;
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}
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// Choose I/O thread to run connecter in. Given that we are already
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// running in an I/O thread, there must be at least one available.
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io_thread_t *io_thread = choose_io_thread (options.affinity);
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zmq_assert (io_thread);
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// Create an init object.
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zmq_init_t *init = new (std::nothrow) zmq_init_t (io_thread, NULL,
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session, fd, options);
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zmq_assert (init);
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launch_sibling (init);
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// Shut the connecter down.
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terminate ();
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}
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void zmq::zmq_connecter_t::timer_event (int id_)
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{
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zmq_assert (id_ == reconnect_timer_id);
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wait = false;
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start_connecting ();
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}
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void zmq::zmq_connecter_t::start_connecting ()
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{
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// Open the connecting socket.
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int rc = tcp_connecter.open ();
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// Connect may succeed in synchronous manner.
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if (rc == 0) {
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handle = add_fd (tcp_connecter.get_fd ());
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handle_valid = true;
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out_event ();
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return;
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}
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// Connection establishment may be dealyed. Poll for its completion.
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else if (rc == -1 && errno == EAGAIN) {
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handle = add_fd (tcp_connecter.get_fd ());
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handle_valid = true;
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set_pollout (handle);
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return;
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}
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// Handle any other error condition by eventual reconnect.
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wait = true;
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add_timer (get_reconnect_ivl (), reconnect_timer_id);
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}
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