BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
2 | * @file |
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3 | * SNMP server MIB API to implement thread synchronization |
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4 | */ |
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5 | |||
6 | /* |
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7 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
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8 | * All rights reserved. |
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9 | * |
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10 | * Redistribution and use in source and binary forms, with or without modification, |
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11 | * are permitted provided that the following conditions are met: |
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12 | * |
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13 | * 1. Redistributions of source code must retain the above copyright notice, |
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14 | * this list of conditions and the following disclaimer. |
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15 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
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16 | * this list of conditions and the following disclaimer in the documentation |
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17 | * and/or other materials provided with the distribution. |
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18 | * 3. The name of the author may not be used to endorse or promote products |
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19 | * derived from this software without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
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24 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
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26 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
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30 | * OF SUCH DAMAGE. |
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31 | * |
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32 | * This file is part of the lwIP TCP/IP stack. |
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33 | * |
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34 | * Author: Dirk Ziegelmeier <dziegel@gmx.de> |
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35 | * |
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36 | */ |
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37 | |||
38 | #ifndef LWIP_HDR_APPS_SNMP_THREADSYNC_H |
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39 | #define LWIP_HDR_APPS_SNMP_THREADSYNC_H |
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40 | |||
41 | #include "lwip/apps/snmp_opts.h" |
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42 | |||
43 | #ifdef __cplusplus |
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44 | extern "C" { |
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45 | #endif |
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46 | |||
47 | #if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ |
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48 | |||
49 | #include "lwip/apps/snmp_core.h" |
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50 | #include "lwip/sys.h" |
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51 | |||
52 | typedef void (*snmp_threadsync_called_fn)(void* arg); |
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53 | typedef void (*snmp_threadsync_synchronizer_fn)(snmp_threadsync_called_fn fn, void* arg); |
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54 | |||
55 | |||
56 | /** Thread sync runtime data. For internal usage only. */ |
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57 | struct threadsync_data |
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58 | { |
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59 | union { |
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60 | snmp_err_t err; |
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61 | s16_t s16; |
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62 | } retval; |
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63 | union { |
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64 | const u32_t *root_oid; |
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65 | void *value; |
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66 | } arg1; |
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67 | union { |
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68 | u8_t root_oid_len; |
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69 | u16_t len; |
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70 | } arg2; |
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71 | const struct snmp_threadsync_node *threadsync_node; |
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72 | struct snmp_node_instance proxy_instance; |
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73 | }; |
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74 | |||
75 | /** Thread sync instance. Needed EXCATLY once for every thread to be synced into. */ |
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76 | struct snmp_threadsync_instance |
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77 | { |
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78 | sys_sem_t sem; |
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79 | sys_mutex_t sem_usage_mutex; |
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80 | snmp_threadsync_synchronizer_fn sync_fn; |
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81 | struct threadsync_data data; |
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82 | }; |
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83 | |||
84 | /** SNMP thread sync proxy leaf node */ |
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85 | struct snmp_threadsync_node |
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86 | { |
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87 | /* inherited "base class" members */ |
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88 | struct snmp_leaf_node node; |
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89 | |||
90 | const struct snmp_leaf_node *target; |
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91 | struct snmp_threadsync_instance *instance; |
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92 | }; |
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93 | |||
94 | snmp_err_t snmp_threadsync_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); |
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95 | snmp_err_t snmp_threadsync_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); |
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96 | |||
97 | /** Create thread sync proxy node */ |
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98 | #define SNMP_CREATE_THREAD_SYNC_NODE(oid, target_leaf_node, threadsync_instance) \ |
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99 | {{{ SNMP_NODE_THREADSYNC, (oid) }, \ |
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100 | snmp_threadsync_get_instance, \ |
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101 | snmp_threadsync_get_next_instance }, \ |
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102 | (target_leaf_node), \ |
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103 | (threadsync_instance) } |
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104 | |||
105 | /** Create thread sync instance data */ |
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106 | void snmp_threadsync_init(struct snmp_threadsync_instance *instance, snmp_threadsync_synchronizer_fn sync_fn); |
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107 | |||
108 | #endif /* LWIP_SNMP */ |
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109 | |||
110 | #ifdef __cplusplus |
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111 | } |
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112 | #endif |
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113 | |||
114 | #endif /* LWIP_HDR_APPS_SNMP_THREADSYNC_H */ |