1 /* 2 * Copyright (C) 2010 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 A_HANDLER_H_ 18 19 #define A_HANDLER_H_ 20 21 #include <media/stagefright/foundation/ALooper.h> 22 #include <utils/KeyedVector.h> 23 #include <utils/RefBase.h> 24 25 namespace android { 26 27 struct AMessage; 28 29 struct AHandler : public RefBase { AHandlerAHandler30 AHandler() 31 : mID(0), 32 mVerboseStats(false), 33 mMessageCounter(0) { 34 } 35 idAHandler36 ALooper::handler_id id() const { 37 return mID; 38 } 39 looperAHandler40 sp<ALooper> looper() const { 41 return mLooper.promote(); 42 } 43 getLooperAHandler44 wp<ALooper> getLooper() const { 45 return mLooper; 46 } 47 getHandlerAHandler48 wp<AHandler> getHandler() const { 49 // allow getting a weak reference to a const handler 50 return const_cast<AHandler *>(this); 51 } 52 53 protected: 54 virtual void onMessageReceived(const sp<AMessage> &msg) = 0; 55 56 private: 57 friend struct AMessage; // deliverMessage() 58 friend struct ALooperRoster; // setID() 59 60 ALooper::handler_id mID; 61 wp<ALooper> mLooper; 62 setIDAHandler63 inline void setID(ALooper::handler_id id, wp<ALooper> looper) { 64 mID = id; 65 mLooper = looper; 66 } 67 68 bool mVerboseStats; 69 uint32_t mMessageCounter; 70 KeyedVector<uint32_t, uint32_t> mMessages; 71 72 void deliverMessage(const sp<AMessage> &msg); 73 74 DISALLOW_EVIL_CONSTRUCTORS(AHandler); 75 }; 76 77 } // namespace android 78 79 #endif // A_HANDLER_H_ 80