1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef LOG_BUFFER_H 17 #define LOG_BUFFER_H 18 19 #include <cstdint> 20 #include <functional> 21 #include <list> 22 #include <map> 23 #include <memory> 24 #include <shared_mutex> 25 26 #include "log_data.h" 27 #include "log_filter.h" 28 29 namespace OHOS { 30 namespace HiviewDFX { 31 class HilogBuffer { 32 public: 33 using LogMsgContainer = std::list<HilogData>; 34 using ReaderId = uintptr_t; 35 using OnFound = std::function<void(const HilogData&)>; 36 37 HilogBuffer(); 38 ~HilogBuffer(); 39 40 size_t Insert(const HilogMsg& msg); 41 bool Query(const LogFilterExt& filter, const ReaderId& id, OnFound onFound); 42 43 ReaderId CreateBufReader(std::function<void()> onNewDataCallback); 44 void RemoveBufReader(const ReaderId& id); 45 46 int32_t Delete(uint16_t logType); 47 int64_t GetBuffLen(uint16_t logType); 48 int32_t SetBuffLen(uint16_t logType, uint64_t buffSize); 49 int32_t GetStatisticInfoByLog(uint16_t logType, uint64_t& printLen, uint64_t& cacheLen, int32_t& dropped); 50 int32_t GetStatisticInfoByDomain(uint32_t domain, uint64_t& printLen, uint64_t& cacheLen, int32_t& dropped); 51 int32_t ClearStatisticInfoByLog(uint16_t logType); 52 int32_t ClearStatisticInfoByDomain(uint32_t domain); 53 54 static bool LogMatchFilter(const LogFilterExt& filter, const HilogData& logData); 55 private: 56 struct BufferReader { 57 LogMsgContainer::iterator m_pos; 58 LogMsgContainer* m_msgList = nullptr; 59 std::function<void()> m_onNewDataCallback; 60 }; 61 62 void UpdateStatistics(const HilogData& logData); 63 void OnDeleteItem(LogMsgContainer::iterator itemPos); 64 void OnPushBackedItem(LogMsgContainer& msgList); 65 void OnNewItem(LogMsgContainer& msgList); 66 std::shared_ptr<BufferReader> GetReader(const ReaderId& id); 67 68 size_t size; 69 size_t sizeByType[LOG_TYPE_MAX]; 70 LogMsgContainer hilogDataList; 71 LogMsgContainer hilogKlogList; 72 std::shared_mutex hilogBufferMutex; 73 std::map<uint32_t, uint64_t> cacheLenByDomain; 74 std::map<uint32_t, uint64_t> printLenByDomain; 75 std::map<uint32_t, uint64_t> droppedByDomain; 76 uint64_t cacheLenByType[LOG_TYPE_MAX]; 77 uint64_t droppedByType[LOG_TYPE_MAX]; 78 uint64_t printLenByType[LOG_TYPE_MAX]; 79 80 std::map<ReaderId, std::shared_ptr<BufferReader>> m_logReaders; 81 std::shared_mutex m_logReaderMtx; 82 }; 83 } // namespace HiviewDFX 84 } // namespace OHOS 85 #endif 86