Mistake on this page?
Report an issue in GitHub or email us
snmp_threadsync.h
Go to the documentation of this file.
1 /**
2  * @file
3  * SNMP server MIB API to implement thread synchronization
4  */
5 
6 /*
7  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
8  * All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without modification,
11  * are permitted provided that the following conditions are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright notice,
14  * this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright notice,
16  * this list of conditions and the following disclaimer in the documentation
17  * and/or other materials provided with the distribution.
18  * 3. The name of the author may not be used to endorse or promote products
19  * derived from this software without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
22  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
24  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
30  * OF SUCH DAMAGE.
31  *
32  * This file is part of the lwIP TCP/IP stack.
33  *
34  * Author: Dirk Ziegelmeier <dziegel@gmx.de>
35  *
36  */
37 
38 #ifndef LWIP_HDR_APPS_SNMP_THREADSYNC_H
39 #define LWIP_HDR_APPS_SNMP_THREADSYNC_H
40 
41 #include "lwip/apps/snmp_opts.h"
42 
43 #ifdef __cplusplus
44 extern "C" {
45 #endif
46 
47 #if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
48 
49 #include "lwip/apps/snmp_core.h"
50 #include "lwip/sys.h"
51 
52 typedef void (*snmp_threadsync_called_fn)(void* arg);
53 typedef void (*snmp_threadsync_synchronizer_fn)(snmp_threadsync_called_fn fn, void* arg);
54 
55 
56 /** Thread sync runtime data. For internal usage only. */
57 struct threadsync_data
58 {
59  union {
60  snmp_err_t err;
61  s16_t s16;
62  } retval;
63  union {
64  const u32_t *root_oid;
65  void *value;
66  } arg1;
67  union {
68  u8_t root_oid_len;
69  u16_t len;
70  } arg2;
71  const struct snmp_threadsync_node *threadsync_node;
72  struct snmp_node_instance proxy_instance;
73 };
74 
75 /** Thread sync instance. Needed EXCATLY once for every thread to be synced into. */
76 struct snmp_threadsync_instance
77 {
78  sys_sem_t sem;
79  sys_mutex_t sem_usage_mutex;
80  snmp_threadsync_synchronizer_fn sync_fn;
81  struct threadsync_data data;
82 };
83 
84 /** SNMP thread sync proxy leaf node */
85 struct snmp_threadsync_node
86 {
87  /* inherited "base class" members */
88  struct snmp_leaf_node node;
89 
90  const struct snmp_leaf_node *target;
91  struct snmp_threadsync_instance *instance;
92 };
93 
94 snmp_err_t snmp_threadsync_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
95 snmp_err_t snmp_threadsync_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
96 
97 /** Create thread sync proxy node */
98 #define SNMP_CREATE_THREAD_SYNC_NODE(oid, target_leaf_node, threadsync_instance) \
99  {{{ SNMP_NODE_THREADSYNC, (oid) }, \
100  snmp_threadsync_get_instance, \
101  snmp_threadsync_get_next_instance }, \
102  (target_leaf_node), \
103  (threadsync_instance) }
104 
105 /** Create thread sync instance data */
106 void snmp_threadsync_init(struct snmp_threadsync_instance *instance, snmp_threadsync_synchronizer_fn sync_fn);
107 
108 #endif /* LWIP_SNMP */
109 
110 #ifdef __cplusplus
111 }
112 #endif
113 
114 #endif /* LWIP_HDR_APPS_SNMP_THREADSYNC_H */
Connected isochronous stream node.
Definition: lctr_int_cis.h:299
SNMP core API for implementing MIBs.
OS abstraction layer.
SNMP server options list.
Important Information for this Arm website

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies. If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled. By disabling cookies, some features of the site will not work.