//build 20240425
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//看门狗组件，用于监控应用是否卡死，设置一个超时时间，如果超过这个时间没有喂狗，会自动触发设备重启
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//注意使用看门狗之前可能需要先初始化gpio
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//依赖组件 dxDriver,dxLogger,dxCommon,dxMap,dxGpio
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import { watchdogClass } from './libvbar-b-dxwatchdog.so'
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import dxMap from './dxMap.js'
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import logger from './dxLogger.js'
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import dxCommon from './dxCommon.js'
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const map = dxMap.get("___watchdog")
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const watchdogObj = new watchdogClass();
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const watchdog = {}
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watchdog.last = new Date().getTime()
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/**
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* 打开看门狗设备
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* @param {number} type 必填
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* @param {string} id 句柄id，非必填（若初始化多个实例需要传入唯一id）
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*/
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watchdog.open = function (type, id) {
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let pointer = watchdogObj.open(type)
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if (pointer === undefined || pointer === null) {
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throw new Error("watchdog.open: open failed")
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}
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dxCommon.handleId("watchdog", id, pointer)
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}
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/**
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* 控制指定通道开关
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* @param {number} chan 通道id,必填
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* @param {string} id 句柄id，非必填（需保持和init中的id一致）
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* @returns true/false
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*/
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watchdog.enable = function (chan, id) {
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let pointer = dxCommon.handleId("watchdog", id)
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return watchdogObj.enable(pointer, chan)
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}
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/**
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* 开启看门狗总定时器
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* @param {*} timeout 必填
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* @param {string} id 句柄id，非必填（需保持和init中的id一致）
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* @returns true/false
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*/
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watchdog.start = function (timeout, id) {
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let pointer = dxCommon.handleId("watchdog", id)
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return watchdogObj.start(pointer, timeout)
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}
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/**
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* 判断是否是上电复位，看门狗是否已经启动
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* @param {string} id 句柄id，非必填（需保持和init中的id一致）
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* @returns true/false
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*/
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watchdog.isPoweron = function (id) {
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let pointer = dxCommon.handleId("watchdog", id)
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return watchdogObj.isPoweron(pointer)
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}
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/**
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* 喂狗指定通道
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* @param {*} chan 通道id，必填
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* @param {string} id 句柄id，非必填（需保持和init中的id一致）
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* @returns true/false
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*/
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watchdog.restart = function (chan, id) {
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let pointer = dxCommon.handleId("watchdog", id)
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return watchdogObj.restart(pointer, chan)
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}
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/**
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* 关闭看门狗总定时器
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* @param {string} id 句柄id，非必填（需保持和init中的id一致）
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* @returns true/false
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*/
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watchdog.stop = function (id) {
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let pointer = dxCommon.handleId("watchdog", id)
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return watchdogObj.stop(pointer)
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}
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/**
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* 关闭看门狗设备
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* @param {string} id 句柄id，非必填（需保持和init中的id一致）
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* @returns true/false
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*/
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watchdog.close = function (id) {
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let pointer = dxCommon.handleId("watchdog", id)
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return watchdogObj.close(pointer)
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}
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/**
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* 循环检查每个线程的喂狗情况，任何一个线程没有喂狗，则不启动restart
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* @param {number} chan 通道id，必填
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* @param {string} id 句柄id，非必填（需保持和init中的id一致）
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*/
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watchdog.loop = function (chan, id) {
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const now = new Date().getTime()
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const minus = now - watchdog.last
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if (minus > 3000 || minus < 0) {//每3秒检查一次或者小于0代表操作了往前改时间
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watchdog.last = now
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let keys = map.keys()
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let check = true
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for (let i = 0; i < keys.length; i++) {
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let key = keys[i]
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let value = map.get(key)
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const temp = now - value.now
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if (temp > value.timeout * 1000 && temp < 1700000000) {
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logger.error(`The worker ${key} did not feed the dog in time.`, temp)
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check = false
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break
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}
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}
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if (check) {
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this.restart(chan, id)
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}
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}
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}
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/**
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* 不同的线程喂狗
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* @param {string} flag 线程的标识,必填不能为空
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* @param {number} timeout 线程可以多长时间不喂狗（秒），缺省是10秒
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*/
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watchdog.feed = function (flag, timeout = 10) {
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if (!flag || flag.length <= 0) {
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return
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}
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map.put(flag, { now: new Date().getTime(), timeout: timeout })
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}
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export default watchdog;
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