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 mDeliveringMessage(false), 35 mCurrentMessageWhat(0), 36 mCurrentMessageStartTimeUs(0){ 37 } 38 idAHandler39 ALooper::handler_id id() const { 40 return mID; 41 } 42 looperAHandler43 sp<ALooper> looper() const { 44 return mLooper.promote(); 45 } 46 getLooperAHandler47 wp<ALooper> getLooper() const { 48 return mLooper; 49 } 50 getHandlerAHandler51 wp<AHandler> getHandler() const { 52 // allow getting a weak reference to a const handler 53 return const_cast<AHandler *>(this); 54 } 55 56 protected: 57 virtual void onMessageReceived(const sp<AMessage> &msg) = 0; 58 59 private: 60 friend struct AMessage; // deliverMessage() 61 friend struct ALooperRoster; // setID() 62 63 ALooper::handler_id mID; 64 wp<ALooper> mLooper; 65 setIDAHandler66 inline void setID(ALooper::handler_id id, const wp<ALooper> &looper) { 67 mID = id; 68 mLooper = looper; 69 } 70 71 bool mVerboseStats; 72 uint64_t mMessageCounter; 73 KeyedVector<uint32_t, uint32_t> mMessages; 74 75 Mutex mLock; 76 bool mDeliveringMessage; 77 uint32_t mCurrentMessageWhat; 78 int64_t mCurrentMessageStartTimeUs; 79 80 void deliverMessage(const sp<AMessage> &msg); 81 82 void setDeliveryStatus(bool, uint32_t, int64_t); 83 void getDeliveryStatus(bool&, uint32_t&, int64_t&); 84 85 86 DISALLOW_EVIL_CONSTRUCTORS(AHandler); 87 }; 88 89 } // namespace android 90 91 #endif // A_HANDLER_H_ 92