/* crypto/pqueue/pqueue.h */
/*
* DTLS implementation written by Nagendra Modadugu
* ([email protected]) for the OpenSSL project 2005.
*/
/* ====================================================================
* Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* [email protected].
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/

#ifndef HEADER_PQUEUE_H
# define HEADER_PQUEUE_H

# include <stdio.h>
# include <stdlib.h>
# include <string.h>

#ifdef __cplusplus
extern "C" {
#endif
typedef struct _pqueue *pqueue;

typedef struct _pitem {
unsigned char priority[8]; /* 64-bit value in big-endian encoding */
void *data;
struct _pitem *next;
} pitem;

typedef struct _pitem *piterator;

pitem *pitem_new(unsigned char *prio64be, void *data);
void pitem_free(pitem *item);

pqueue pqueue_new(void);
void pqueue_free(pqueue pq);

pitem *pqueue_insert(pqueue pq, pitem *item);
pitem *pqueue_peek(pqueue pq);
pitem *pqueue_pop(pqueue pq);
pitem *pqueue_find(pqueue pq, unsigned char *prio64be);
pitem *pqueue_iterator(pqueue pq);
pitem *pqueue_next(piterator *iter);

void pqueue_print(pqueue pq);
int pqueue_size(pqueue pq);

#ifdef __cplusplus
}
#endif
#endif /* ! HEADER_PQUEUE_H */