1 /* Priority queue functions.
2 Copyright (C) 2003 Yasuhiro Ohara
4 This file is part of GNU Zebra.
6 GNU Zebra is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published
8 by the Free Software Foundation; either version 2, or (at your
9 option) any later version.
11 GNU Zebra is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Zebra; see the file COPYING. If not, write to the
18 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 #ifndef _ZEBRA_PQUEUE_H
22 #define _ZEBRA_PQUEUE_H
30 int (*cmp) (void *, void *);
31 void (*update) (void * node, int actual_position);
34 #define PQUEUE_INIT_ARRAYSIZE 32
36 extern struct pqueue *pqueue_create (void);
37 extern void pqueue_delete (struct pqueue *queue);
39 extern void pqueue_enqueue (void *data, struct pqueue *queue);
40 extern void *pqueue_dequeue (struct pqueue *queue);
41 extern void pqueue_remove_at (int index, struct pqueue *queue);
43 extern void trickle_down (int index, struct pqueue *queue);
44 extern void trickle_up (int index, struct pqueue *queue);
46 #endif /* _ZEBRA_PQUEUE_H */