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/* Priority queue functions.
* Copyright (C) 2003 Yasuhiro Ohara
*
* This file is part of GNU Zebra.
*
* GNU Zebra 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, or (at your
* option) any later version.
*
* GNU Zebra 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 _ZEBRA_PQUEUE_H
#define _ZEBRA_PQUEUE_H
struct pqueue
{
void **array;
int array_size;
int size;
int (*cmp) (void *, void *);
void (*update) (void * node, int actual_position);
};
#define PQUEUE_INIT_ARRAYSIZE 32
extern struct pqueue *pqueue_create (void);
extern void pqueue_delete (struct pqueue *queue);
extern void pqueue_enqueue (void *data, struct pqueue *queue);
extern void *pqueue_dequeue (struct pqueue *queue);
extern void pqueue_remove_at (int index, struct pqueue *queue);
extern void pqueue_remove (void *data, struct pqueue *queue);
extern void trickle_down (int index, struct pqueue *queue);
extern void trickle_up (int index, struct pqueue *queue);
#endif /* _ZEBRA_PQUEUE_H */
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