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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/>.
*/
#include "../include/zmq.h"
#include "io_thread.hpp"
#include "command.hpp"
#include "platform.hpp"
#include "err.hpp"
#include "command.hpp"
#include "epoll.hpp"
#include "poll.hpp"
#include "select.hpp"
#include "devpoll.hpp"
#include "kqueue.hpp"
#include "dispatcher.hpp"
#include "simple_semaphore.hpp"
zmq::io_thread_t::io_thread_t (dispatcher_t *dispatcher_, int thread_slot_) :
object_t (dispatcher_, thread_slot_)
{
#if defined ZMQ_FORCE_SELECT
poller = new select_t;
#elif defined ZMQ_FORCE_POLL
poller = new poll_t;
#elif defined ZMQ_FORCE_EPOLL
poller = new epoll_t;
#elif defined ZMQ_FORCE_DEVPOLL
poller = new devpoll_t;
#elif defined ZMQ_FORCE_KQUEUE
poller = new kqueue_t;
#elif defined ZMQ_HAVE_LINUX
poller = new epoll_t;
#elif defined ZMQ_HAVE_WINDOWS
poller = new select_t;
#elif defined ZMQ_HAVE_FREEBSD
poller = new kqueue_t;
#elif defined ZMQ_HAVE_OPENBSD
poller = new kqueue_t;
#elif defined ZMQ_HAVE_SOLARIS
poller = new devpoll_t;
#elif defined ZMQ_HAVE_OSX
poller = new kqueue_t;
#elif defined ZMQ_HAVE_QNXNTO
poller = new poll_t;
#elif defined ZMQ_HAVE_AIX
poller = new poll_t;
#elif defined ZMQ_HAVE_HPUX
poller = new devpoll_t;
#elif defined ZMQ_HAVE_OPENVMS
poller = new select_t;
#else
#error Unsupported platform
#endif
zmq_assert (poller);
signaler_handle = poller->add_fd (signaler.get_fd (), this);
poller->set_pollin (signaler_handle);
}
zmq::io_thread_t::~io_thread_t ()
{
delete poller;
}
void zmq::io_thread_t::start ()
{
// Start the underlying I/O thread.
poller->start ();
}
void zmq::io_thread_t::stop ()
{
send_stop ();
}
zmq::i_signaler *zmq::io_thread_t::get_signaler ()
{
return &signaler;
}
int zmq::io_thread_t::get_load ()
{
return poller->get_load ();
}
void zmq::io_thread_t::in_event ()
{
// Find out which threads are sending us commands.
fd_signaler_t::signals_t signals = signaler.check ();
zmq_assert (signals);
// Iterate through all the threads in the process and find out
// which of them sent us commands.
int slot_count = thread_slot_count ();
for (int source_thread_slot = 0;
source_thread_slot != slot_count; source_thread_slot++) {
if (signals & (fd_signaler_t::signals_t (1) << source_thread_slot)) {
// Read all the commands from particular thread.
command_t cmd;
while (dispatcher->read (source_thread_slot, thread_slot, &cmd))
cmd.destination->process_command (cmd);
}
}
}
void zmq::io_thread_t::out_event ()
{
// We are never polling for POLLOUT here. This function is never called.
zmq_assert (false);
}
void zmq::io_thread_t::timer_event ()
{
// No timers here. This function is never called.
zmq_assert (false);
}
zmq::i_poller *zmq::io_thread_t::get_poller ()
{
zmq_assert (poller);
return poller;
}
void zmq::io_thread_t::process_stop ()
{
poller->rm_fd (signaler_handle);
poller->stop ();
}
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