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115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/**
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* @file
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* SNMP server MIB API to implement thread synchronization
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*/
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/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Dirk Ziegelmeier <dziegel@gmx.de>
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*
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*/
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#ifndef LWIP_HDR_APPS_SNMP_THREADSYNC_H
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#define LWIP_HDR_APPS_SNMP_THREADSYNC_H
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#include "lwip/apps/snmp_opts.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
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#include "lwip/apps/snmp_core.h"
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#include "lwip/sys.h"
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typedef void (*snmp_threadsync_called_fn)(void* arg);
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typedef void (*snmp_threadsync_synchronizer_fn)(snmp_threadsync_called_fn fn, void* arg);
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/** Thread sync runtime data. For internal usage only. */
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struct threadsync_data
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{
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union {
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snmp_err_t err;
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s16_t s16;
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} retval;
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union {
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const u32_t *root_oid;
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void *value;
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} arg1;
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union {
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u8_t root_oid_len;
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u16_t len;
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} arg2;
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const struct snmp_threadsync_node *threadsync_node;
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struct snmp_node_instance proxy_instance;
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};
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/** Thread sync instance. Needed EXCATLY once for every thread to be synced into. */
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struct snmp_threadsync_instance
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{
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sys_sem_t sem;
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sys_mutex_t sem_usage_mutex;
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snmp_threadsync_synchronizer_fn sync_fn;
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struct threadsync_data data;
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};
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/** SNMP thread sync proxy leaf node */
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struct snmp_threadsync_node
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{
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/* inherited "base class" members */
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struct snmp_leaf_node node;
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const struct snmp_leaf_node *target;
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struct snmp_threadsync_instance *instance;
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};
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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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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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/** Create thread sync proxy node */
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#define SNMP_CREATE_THREAD_SYNC_NODE(oid, target_leaf_node, threadsync_instance) \
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{{{ SNMP_NODE_THREADSYNC, (oid) }, \
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snmp_threadsync_get_instance, \
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snmp_threadsync_get_next_instance }, \
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(target_leaf_node), \
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(threadsync_instance) }
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/** Create thread sync instance data */
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void snmp_threadsync_init(struct snmp_threadsync_instance *instance, snmp_threadsync_synchronizer_fn sync_fn);
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#endif /* LWIP_SNMP */
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#ifdef __cplusplus
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}
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#endif
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#endif /* LWIP_HDR_APPS_SNMP_THREADSYNC_H */
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