| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #pragma once |
| |
| #include <sys/types.h> |
| |
| #include <functional> |
| |
| #include <log/log.h> |
| #include <sysutils/SocketClient.h> |
| |
| #include "LogBufferElement.h" |
| |
| class LogWriter; |
| |
| enum class FlushToResult { |
| kSkip, |
| kStop, |
| kWrite, |
| }; |
| |
| class LogBuffer { |
| public: |
| virtual ~LogBuffer() {} |
| |
| virtual void Init() = 0; |
| |
| virtual int Log(log_id_t log_id, log_time realtime, uid_t uid, pid_t pid, pid_t tid, |
| const char* msg, uint16_t len) = 0; |
| // lastTid is an optional context to help detect if the last previous |
| // valid message was from the same source so we can differentiate chatty |
| // filter types (identical or expired) |
| static const uint64_t FLUSH_ERROR = 0; |
| virtual uint64_t FlushTo( |
| LogWriter* writer, uint64_t start, |
| pid_t* last_tid, // nullable |
| const std::function<FlushToResult(const LogBufferElement* element)>& filter) = 0; |
| |
| virtual bool Clear(log_id_t id, uid_t uid) = 0; |
| virtual unsigned long GetSize(log_id_t id) = 0; |
| virtual int SetSize(log_id_t id, unsigned long size) = 0; |
| |
| virtual uint64_t sequence() const = 0; |
| }; |