1 /* 2 * Copyright 2021 Google, Inc 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <atomic> 20 #include <signal.h> 21 #include <time.h> 22 23 class Watchdog { 24 private: 25 int timeout_; 26 timer_t timer_; 27 std::atomic<bool> timer_created_; 28 void (*callback_)(); 29 public: Watchdog(int timeout,void (* callback)())30 Watchdog(int timeout, void (*callback)()) : 31 timeout_(timeout), timer_created_(false), callback_(callback) {} 32 33 bool init(); 34 bool start(); 35 bool stop(); 36 // used by the watchdog_main 37 bool create_timer(sigset_t &sigset); bite()38 void bite() const { if (callback_) callback_(); } 39 }; 40