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