snmp->notify_register

根据提供的引用内容，snmp->notify_register是一个函数调用，它的参数包括trapids、targets和my_trap_callback。这个函数的作用是向SNMP代理注册一个或多个陷阱ID，以及一个或多个接收陷阱的目标。当代理接收到一个陷阱时，它将调用my_trap_callback函数。具体实现可能需要查看更多的代码和文档。

下面是一个示例代码，展示了如何使用snmp->notify_register函数：

// 定义陷阱ID和目标
oid trap_oid[] = { 1, 3, 6, 1, 4, 1, 12345, 0, 1 };
SnmpTarget target("udp:192.168.1.1");

// 注册陷阱和目标
int status = snmp->notify_register(trap_oid, &target, &my_trap_callback);
if (status != SNMP_CLASS_SUCCESS) {
    cerr << "Failed to register trap: " << snmp->error_msg(status) << endl;
}

相关问题

/* * Copyright (C) 2011-2014 MediaTek Inc. * * This program is free software: you can redistribute it and/or modify it under the terms of the * GNU General Public License version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along with this program. * If not, see <http://www.gnu.org/licenses/>. */ #include <linux/module.h> #include <linux/list.h> #include <linux/spinlock.h> #include "SCP_power_monitor.h" #include "scp_helper.h" static LIST_HEAD(power_monitor_list); static DEFINE_SPINLOCK(pm_lock); static atomic_t power_status = ATOMIC_INIT(SENSOR_POWER_DOWN); void scp_power_monitor_notify(uint8_t action, void *data) { struct scp_power_monitor *c; unsigned long flags; spin_lock_irqsave(&pm_lock, flags); list_for_each_entry(c, &power_monitor_list, list) { WARN_ON(c->notifier_call == NULL); c->notifier_call(action, data); pr_debug("scp_power_monitor_notify, module name:%s notify\n", c->name); } switch (action) { case SENSOR_POWER_DOWN: atomic_set(&power_status, SENSOR_POWER_DOWN); break; case SENSOR_POWER_UP: atomic_set(&power_status, SENSOR_POWER_UP); break; } spin_unlock_irqrestore(&pm_lock, flags); } int scp_power_monitor_register(struct scp_power_monitor *monitor) { int err = 0; struct scp_power_monitor *c; WARN_ON(monitor->name == NULL || monitor->notifier_call == NULL); spin_lock_irq(&pm_lock); list_for_each_entry(c, &power_monitor_list, list) { if (!strcmp(c->name, monitor->name)) { err = -1; goto out; } } list_add(&monitor->list, &power_monitor_list); if (atomic_read(&power_status) == SENSOR_POWER_UP) { pr_debug("scp_power_monitor_notify, module name:%s notify\n", monitor->name); monitor->notifier_call(SENSOR_POWER_UP, NULL); } spin_unlock_irq(&pm_lock); return err; out: pr_err("%s scp_power_monitor_register fail\n", monitor->name); spin_unlock_irq(&pm_lock); return err; } int scp_power_monitor_deregister(struct scp_power_monitor *monitor) { if (WARN_ON(list_empty(&monitor->list))) return -1; spin_lock_irq(&pm_lock); list_del(&monitor->list); spin_unlock_irq(&pm_lock); return 0; }分析代码

这段代码是一个基于 Linux 内核的电源监控模块，主要包含以下几个部分：

1. 头文件引入和宏定义：包括了一些必要的头文件和宏定义，如模块、链表、自旋锁等。

2. 结构体定义：定义了一个名为 scp_power_monitor 的结构体，包含了模块名称、通知回调函数等信息。

3. 全局变量定义：定义了一个名为 power_monitor_list 的链表和一个名为 power_status 的原子变量，分别用于存储已注册的电源监控模块和当前电源状态。

4. scp_power_monitor_notify 函数：用于通知所有已注册的电源监控模块有关电源状态的改变，通过遍历链表来调用每个模块的通知回调函数来实现。同时，根据 action 参数来更新 power_status 变量的值。

5. scp_power_monitor_register 函数：用于注册电源监控模块，将其添加到 power_monitor_list 链表中。如果已经存在同名模块，则返回错误；否则添加到链表中，并且如果当前电源状态为 SENSOR_POWER_UP，则调用该模块的通知回调函数来提醒其电源已经打开。

6. scp_power_monitor_deregister 函数：用于注销电源监控模块，从 power_monitor_list 链表中删除该模块的信息。

总体来说，这段代码实现了一个简单的电源监控模块，在需要监控电源状态的场景下可以作为一个可靠的工具使用。

unsigned char os_timer_start_periodic (unsigned char os_timer_id, unsigned short notify_event, unsigned short period) { OS_TMR_T *ptimer; if ((os_timer_id >= MAX_TIMER_NUMBER) || (notify_event == 0) || (period == 0)) { return ERROR_TIMER_GENERAL; } CPU_ENTER_CRITICAL(); ptimer = &os_timer[os_timer_id]; ptimer->notify_task_id = os_timer_notify_task_id_table[os_timer_id][1]; ptimer->notify_event = notify_event; ptimer->period = period; ptimer->count = period; ptimer->status = 0x81; /* set the PERIODIC & START bit */ CPU_EXIT_CRITICAL(); return ERROR_NONE; }

Sorry, it seems like you pasted an incomplete code snippet. Could you please provide me with the complete code and context so that I can understand what you're trying to achieve and help you better?