/***
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*
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* ipv4/tcp/timerwheel.h - timerwheel interface for RTnet
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*
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* Copyright (C) 2009 Vladimir Zapolskiy <vladimir.zapolskiy@siemens.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifndef __TIMERWHEEL_H_
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#define __TIMERWHEEL_H_
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#include <linux/list.h>
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#include <rtdm/net.h>
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#define TIMERWHEEL_TIMER_UNUSED -1
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typedef void (*timerwheel_timer_handler)(void *);
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struct timerwheel_timer {
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struct list_head link;
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timerwheel_timer_handler handler;
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void *data;
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int slot;
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volatile int refcount; /* only written by wheel task */
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};
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static inline void timerwheel_init_timer(struct timerwheel_timer *timer,
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timerwheel_timer_handler handler,
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void *data)
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{
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timer->slot = TIMERWHEEL_TIMER_UNUSED;
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timer->handler = handler;
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timer->data = data;
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timer->refcount = 0;
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}
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/* passed data must remain valid till a timer fireup */
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int timerwheel_add_timer(struct timerwheel_timer *timer,
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nanosecs_rel_t expires);
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int timerwheel_remove_timer(struct timerwheel_timer *timer);
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void timerwheel_remove_timer_sync(struct timerwheel_timer *timer);
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int timerwheel_init(nanosecs_rel_t timeout, unsigned int granularity);
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void timerwheel_cleanup(void);
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#endif
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