1 /* 2 * Copyright (C) 2016 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 WIFICOND_EVENT_LOOP_H_ 18 #define WIFICOND_EVENT_LOOP_H_ 19 20 #include <functional> 21 22 namespace android { 23 namespace wificond { 24 25 // Abstract class for dispatching tasks. 26 class EventLoop { 27 public: 28 enum ReadyMode { 29 kModeInput, 30 kModeOutput 31 }; 32 33 virtual ~EventLoop() {} 34 35 // Enqueues a callback. 36 // This function can be called on any thread. 37 virtual void PostTask(const std::function<void()>& callback) = 0; 38 39 // Enqueues a callback to be processed after a specified period of time. 40 // |delay_ms| is delay time in milliseconds. It should not be negative. 41 // This function can be called on any thread. 42 virtual void PostDelayedTask(const std::function<void()>& callback, 43 int64_t delay_ms) = 0; 44 45 // Monitoring file descriptor for data. 46 // Callback will be executed when specific file descriptor is ready. 47 // File descriptor is provided as a parameter to this callback: 48 // This function can be called on any thread. 49 // This returns true upon success and returns false when it failed. 50 virtual bool WatchFileDescriptor( 51 int fd, 52 ReadyMode mode, 53 const std::function<void(int)>& callback_) = 0; 54 55 // Stop monitoring file descriptor |fd|. 56 // This function can be called on any thread. 57 // This returns true upon success and returns false when it failed to 58 // remove the file descriptor, or this file descriptor was not registered 59 // for watching. 60 virtual bool StopWatchFileDescriptor(int fd); 61 }; 62 63 } // namespace wificond 64 } // namespace android 65 66 #endif // WIFICOND_EVENT_LOOP_H_ 67
