lib/libssl/pqueue.h

   1 /* $OpenBSD: pqueue.h,v 1.4 2016/11/04 18:28:58 guenther Exp $ */
   2
   3 /*
   4  * DTLS implementation written by Nagendra Modadugu
   5  * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
   6  */
   7 /* ====================================================================
   8  * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  *
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in
  19  *    the documentation and/or other materials provided with the
  20  *    distribution.
  21  *
  22  * 3. All advertising materials mentioning features or use of this
  23  *    software must display the following acknowledgment:
  24  *    "This product includes software developed by the OpenSSL Project
  25  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  26  *
  27  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  28  *    endorse or promote products derived from this software without
  29  *    prior written permission. For written permission, please contact
  30  *    openssl-core@OpenSSL.org.
  31  *
  32  * 5. Products derived from this software may not be called "OpenSSL"
  33  *    nor may "OpenSSL" appear in their names without prior written
  34  *    permission of the OpenSSL Project.
  35  *
  36  * 6. Redistributions of any form whatsoever must retain the following
  37  *    acknowledgment:
  38  *    "This product includes software developed by the OpenSSL Project
  39  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  42  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  44  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  45  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  46  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  47  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  48  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  50  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  51  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  52  * OF THE POSSIBILITY OF SUCH DAMAGE.
  53  * ====================================================================
  54  *
  55  * This product includes cryptographic software written by Eric Young
  56  * (eay@cryptsoft.com).  This product includes software written by Tim
  57  * Hudson (tjh@cryptsoft.com).
  58  *
  59  */
  60
  61 #ifndef HEADER_PQUEUE_H
  62 #define HEADER_PQUEUE_H
  63
  64 __BEGIN_HIDDEN_DECLS
  65
  66 typedef struct _pqueue *pqueue;
  67
  68 typedef struct _pitem {
  69         unsigned char priority[8]; /* 64-bit value in big-endian encoding */
  70         void *data;
  71         struct _pitem *next;
  72 } pitem;
  73
  74 typedef struct _pitem *piterator;
  75
  76 pitem *pitem_new(unsigned char *prio64be, void *data);
  77 void   pitem_free(pitem *item);
  78
  79 pqueue pqueue_new(void);
  80 void   pqueue_free(pqueue pq);
  81
  82 pitem *pqueue_insert(pqueue pq, pitem *item);
  83 pitem *pqueue_peek(pqueue pq);
  84 pitem *pqueue_pop(pqueue pq);
  85 pitem *pqueue_find(pqueue pq, unsigned char *prio64be);
  86 pitem *pqueue_iterator(pqueue pq);
  87 pitem *pqueue_next(piterator *iter);
  88
  89 int    pqueue_size(pqueue pq);
  90
  91 __END_HIDDEN_DECLS
  92
  93 #endif /* ! HEADER_PQUEUE_H */