1 /* 2 * Copyright (c) Huawei Technologies Co., Ltd. 2021. All rights reserved. 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 17 #ifndef STACK_WRITER_H 18 #define STACK_WRITER_H 19 20 #include <atomic> 21 #include <chrono> 22 #include <memory> 23 #include <string> 24 #include "event_notifier.h" 25 #include "share_memory_block.h" 26 #include "writer.h" 27 #include <mutex> 28 29 class StackWriter : public Writer { 30 public: 31 StackWriter(std::string name, 32 uint32_t size, 33 int smbFd, 34 int eventFd, 35 bool blocked = false, 36 bool isSaMode = false); 37 ~StackWriter(); 38 long Write(const void* data, size_t size) override; 39 long WriteTimeout(const void* data, size_t size); 40 long WriteWithPayloadTimeout(const void* data, size_t size, const void* payload, size_t payloadSize, 41 const std::function<bool()>& callback); 42 bool Flush() override; 43 bool PrepareFlush(); 44 45 private: 46 void DoStats(long bytes); 47 void Report() const; 48 49 private: 50 std::string pluginName_; 51 bool blocked_ = false; 52 std::shared_ptr<ShareMemoryBlock> shareMemoryBlock_; 53 EventNotifierPtr eventNotifier_ = nullptr; 54 std::chrono::steady_clock::time_point lastFlushTime_; 55 std::atomic<uint64_t> bytesCount_ = 0; 56 std::atomic<uint32_t> bytesPending_ = 0; 57 std::atomic<uint64_t> writeCount_ = 0; 58 std::atomic<uint32_t> flushCount_ = 0; 59 std::atomic<uint64_t> dataCount_ = 0; 60 std::mutex flushMutex_; 61 }; 62 63 64 #endif // STACK_WRITER_H