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/nblog/Merger.h> 23 #include <media/nblog/NBLog.h> 24 25 namespace android { 26 27 class MediaLogService : public BinderService<MediaLogService>, public BnMediaLogService 28 { 29 friend class BinderService<MediaLogService>; // for MediaLogService() 30 public: 31 MediaLogService(); 32 virtual ~MediaLogService() override; 33 virtual void onFirstRef() { } 34 35 static const char* getServiceName() { return "media.log"; } 36 37 static const size_t kMinSize = 0x100; 38 static const size_t kMaxSize = 0x10000; 39 virtual void registerWriter(const sp<IMemory>& shared, size_t size, const char *name); 40 virtual void unregisterWriter(const sp<IMemory>& shared); 41 42 virtual status_t dump(int fd, const Vector<String16>& args); 43 virtual status_t onTransact(uint32_t code, const Parcel& data, Parcel* reply, 44 uint32_t flags); 45 46 virtual void requestMergeWakeup() override; 47 48 private: 49 50 // Internal dump 51 static const int kDumpLockRetries = 50; 52 static const int kDumpLockSleepUs = 20000; 53 // Size of merge buffer, in bytes 54 static const size_t kMergeBufferSize = 64 * 1024; // TODO determine good value for this 55 static bool dumpTryLock(Mutex& mutex); 56 57 Mutex mLock; 58 59 Vector<sp<NBLog::DumpReader>> mDumpReaders; // protected by mLock 60 61 // FIXME Need comments on all of these, especially about locking 62 NBLog::Shared *mMergerShared; 63 NBLog::Merger mMerger; 64 NBLog::MergeReader mMergeReader; 65 const sp<NBLog::MergeThread> mMergeThread; 66 }; 67 68 } // namespace android 69 70 #endif // ANDROID_MEDIA_LOG_SERVICE_H 71
