1 /* 2 * Copyright (C) 2013 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 ANDROID_MEDIA_LOG_SERVICE_H 18 #define ANDROID_MEDIA_LOG_SERVICE_H 19 20 #include <binder/BinderService.h> 21 #include <media/IMediaLogService.h> 22 #include <media/nbaio/NBLog.h> 23 24 namespace android { 25 26 class MediaLogService : public BinderService<MediaLogService>, public BnMediaLogService 27 { 28 friend class BinderService<MediaLogService>; // for MediaLogService() 29 public: 30 MediaLogService(); 31 virtual ~MediaLogService() override; onFirstRef()32 virtual void onFirstRef() { } 33 getServiceName()34 static const char* getServiceName() { return "media.log"; } 35 36 static const size_t kMinSize = 0x100; 37 static const size_t kMaxSize = 0x10000; 38 virtual void registerWriter(const sp<IMemory>& shared, size_t size, const char *name); 39 virtual void unregisterWriter(const sp<IMemory>& shared); 40 41 virtual status_t dump(int fd, const Vector<String16>& args); 42 virtual status_t onTransact(uint32_t code, const Parcel& data, Parcel* reply, 43 uint32_t flags); 44 45 virtual void requestMergeWakeup() override; 46 47 private: 48 49 // Internal dump 50 static const int kDumpLockRetries = 50; 51 static const int kDumpLockSleepUs = 20000; 52 // Size of merge buffer, in bytes 53 static const size_t kMergeBufferSize = 64 * 1024; // TODO determine good value for this 54 static bool dumpTryLock(Mutex& mutex); 55 56 Mutex mLock; 57 58 Vector<NBLog::NamedReader> mNamedReaders; // protected by mLock 59 60 // FIXME Need comments on all of these, especially about locking 61 NBLog::Shared *mMergerShared; 62 NBLog::Merger mMerger; 63 NBLog::MergeReader mMergeReader; 64 const sp<NBLog::MergeThread> mMergeThread; 65 }; 66 67 } // namespace android 68 69 #endif // ANDROID_MEDIA_LOG_SERVICE_H 70