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 */ 94