| [c69d327] | 1 | /*
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| 2 | * Copyright (c) 2009 Lukas Mejdrech
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libc
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | /** @file
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| 34 | * Packet map and queue.
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| 35 | */
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| 36 |
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| 37 | #ifndef LIBC_PACKET_H_
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| 38 | #define LIBC_PACKET_H_
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| 39 |
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| [49bd793b] | 40 | #include <sys/types.h>
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| 41 |
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| [c69d327] | 42 | /** Packet identifier type.
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| 43 | * Value zero is used as an invalid identifier.
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| 44 | */
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| [49bd793b] | 45 | typedef sysarg_t packet_id_t;
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| [c69d327] | 46 |
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| 47 | /** Type definition of the packet.
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| 48 | * @see packet
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| 49 | */
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| [46d4d9f] | 50 | typedef struct packet packet_t;
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| [c69d327] | 51 |
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| 52 | /** Type definition of the packet dimension.
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| 53 | * @see packet_dimension
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| 54 | */
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| [49bd793b] | 55 | typedef struct packet_dimension packet_dimension_t;
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| [c69d327] | 56 |
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| 57 | /** Packet dimension. */
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| 58 | struct packet_dimension {
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| 59 | /** Reserved packet prefix length. */
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| 60 | size_t prefix;
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| 61 | /** Maximal packet content length. */
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| 62 | size_t content;
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| 63 | /** Reserved packet suffix length. */
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| 64 | size_t suffix;
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| 65 | /** Maximal packet address length. */
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| 66 | size_t addr_len;
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| 67 | };
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| 68 |
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| 69 | /** @name Packet management system interface
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| 70 | */
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| 71 | /*@{*/
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| 72 |
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| [46d4d9f] | 73 | extern packet_t *pm_find(packet_id_t);
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| 74 | extern int pm_add(packet_t *);
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| [609243f4] | 75 | extern void pm_remove(packet_t *);
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| [c69d327] | 76 | extern int pm_init(void);
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| 77 | extern void pm_destroy(void);
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| 78 |
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| [46d4d9f] | 79 | extern int pq_add(packet_t **, packet_t *, size_t, size_t);
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| 80 | extern packet_t *pq_find(packet_t *, size_t);
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| 81 | extern int pq_insert_after(packet_t *, packet_t *);
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| 82 | extern packet_t *pq_detach(packet_t *);
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| 83 | extern int pq_set_order(packet_t *, size_t, size_t);
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| 84 | extern int pq_get_order(packet_t *, size_t *, size_t *);
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| 85 | extern void pq_destroy(packet_t *, void (*)(packet_t *));
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| 86 | extern packet_t *pq_next(packet_t *);
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| 87 | extern packet_t *pq_previous(packet_t *);
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| [c69d327] | 88 |
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| 89 | /*@}*/
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| 90 |
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| 91 | #endif
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| 92 |
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| 93 | /** @}
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| 94 | */
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