1 /* 2 * Copyright (C) 2018 The Android Open Source Project 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 #ifndef _INIT_EPOLL_H 18 #define _INIT_EPOLL_H 19 20 #include <stdint.h> 21 #include <sys/epoll.h> 22 23 #include <chrono> 24 #include <functional> 25 #include <map> 26 #include <optional> 27 28 #include <android-base/unique_fd.h> 29 30 #include "result.h" 31 32 namespace android { 33 namespace init { 34 35 class Epoll { 36 public: 37 Epoll(); 38 39 Result<Success> Open(); 40 Result<Success> RegisterHandler(int fd, std::function<void()> handler, 41 uint32_t events = EPOLLIN); 42 Result<Success> UnregisterHandler(int fd); 43 Result<Success> Wait(std::optional<std::chrono::milliseconds> timeout); 44 45 private: 46 android::base::unique_fd epoll_fd_; 47 std::map<int, std::function<void()>> epoll_handlers_; 48 }; 49 50 } // namespace init 51 } // namespace android 52 53 #endif 54