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/*
* Timer Wheel
* Copyright (C) 2016 Cumulus Networks, Inc.
* Donald Sharp
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#ifndef __WHEEL_H__
#define __WHEEL_H__
struct timer_wheel
{
struct thread_master *master;
int slots;
long long curr_slot;
unsigned int period;
unsigned int nexttime;
unsigned int slots_to_skip;
struct list **wheel_slot_lists;
struct thread *timer;
/*
* Key to determine what slot the item belongs in
*/
unsigned int (*slot_key) (void *);
void (*slot_run) (void *);
};
struct timer_wheel *wheel_init (struct thread_master *master, int period, size_t slots,
unsigned int (*slot_key) (void *),
void (*slot_run) (void *));
void wheel_delete (struct timer_wheel *);
/*
* Pause the Wheel from running
*/
int wheel_stop (struct timer_wheel *wheel);
/*
* Start the wheel from running again
*/
int wheel_start (struct timer_wheel *wheel);
/*
* Add item to a slot setup by the slot_key,
* possibly change next time pop.
*/
int wheel_add_item (struct timer_wheel *wheel, void *item);
/*
* Remove a item to a slot setup by the slot_key,
* possibly change next time pop.
*/
int wheel_remove_item (struct timer_wheel *wheel, void *item);
#endif
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