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/*
Copyright (c) 2009-2012 250bpm s.r.o.
Copyright (c) 2007-2009 iMatix Corporation
Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
This file is part of Crossroads project.
Crossroads is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
Crossroads 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.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __XS_IO_THREAD_HPP_INCLUDED__
#define __XS_IO_THREAD_HPP_INCLUDED__
#include <vector>
#include "stdint.hpp"
#include "object.hpp"
#include "poller_base.hpp"
#include "mailbox.hpp"
namespace xs
{
class ctx_t;
// Generic part of the I/O thread. Polling-mechanism-specific features
// are implemented in separate "polling objects".
class io_thread_t : public object_t, public i_poll_events
{
public:
io_thread_t (xs::ctx_t *ctx_, uint32_t tid_);
// Clean-up. If the thread was started, it's neccessary to call 'stop'
// before invoking destructor. Otherwise the destructor would hang up.
~io_thread_t ();
// Launch the physical thread.
void start ();
// Ask underlying thread to stop.
void stop ();
// Returns mailbox associated with this I/O thread.
mailbox_t *get_mailbox ();
// i_poll_events implementation.
void in_event (fd_t fd_);
void out_event (fd_t fd_);
void timer_event (int id_);
// Used by io_objects to retrieve the assciated poller object.
poller_base_t *get_poller ();
// Command handlers.
void process_stop ();
// Returns load experienced by the I/O thread.
int get_load ();
private:
// I/O thread accesses incoming commands via this mailbox.
mailbox_t mailbox;
// Handle associated with mailbox' file descriptor.
handle_t mailbox_handle;
// I/O multiplexing is performed using a poller object.
poller_base_t *poller;
io_thread_t (const io_thread_t&);
const io_thread_t &operator = (const io_thread_t&);
};
}
#endif
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