1 /* 2 // Copyright (c) 2014 Intel Corporation 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 #ifndef UEVENT_OBSERVER_H 17 #define UEVENT_OBSERVER_H 18 19 #include <utils/KeyedVector.h> 20 #include <utils/String8.h> 21 #include <common/base/SimpleThread.h> 22 23 namespace android { 24 namespace intel { 25 26 typedef void (*UeventListenerFunc)(void *data); 27 28 class UeventObserver 29 { 30 public: 31 UeventObserver(); 32 virtual ~UeventObserver(); 33 34 public: 35 bool initialize(); 36 void deinitialize(); 37 void start(); 38 void registerListener(const char *event, UeventListenerFunc func, void *data); 39 40 private: 41 DECLARE_THREAD(UeventObserverThread, UeventObserver); 42 void onUevent(); 43 44 private: 45 enum { 46 UEVENT_MSG_LEN = 4096, 47 }; 48 49 char mUeventMessage[UEVENT_MSG_LEN]; 50 int mUeventFd; 51 int mExitRDFd; 52 int mExitWDFd; 53 struct UeventListener { 54 UeventListenerFunc func; 55 void *data; 56 }; 57 KeyedVector<String8, UeventListener*> mListeners; 58 }; 59 60 } // namespace intel 61 } // namespace android 62 63 #endif 64 65