105 lines
4.5 KiB
C++
105 lines
4.5 KiB
C++
// Copyright (c) 2014-2015, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef INCLUDED_p2p_data_logger_hpp
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#define INCLUDED_p2p_data_logger_hpp
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#include <string>
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#include <map>
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#include <fstream>
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#include <memory>
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#include <thread>
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#include <mutex>
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#include <atomic>
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namespace epee
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{
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namespace net_utils
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{
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enum class data_logger_state { state_before_init, state_during_init, state_ready_to_use, state_dying };
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/***
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@note: use it ONLY via singleton! It will be spawned then, and will auto destruct on program exit.
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@note: do call ::kill_instance() before exiting main, at end of main. But before make sure no one else (e.g. no other threads) will try to use this/singleton
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@note: it is not allowed to use this class from code "runnig before or after main", e.g. from ctors of static objects, because of static-creation-order races
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@note: on creation (e.g. from singleton), it spawns a thread that saves all data in background
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*/
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class data_logger {
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public:
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static data_logger &get_instance(); ///< singleton
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static void kill_instance(); ///< call this before ending main to allow more gracefull shutdown of the main singleton and it's background thread
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~data_logger(); ///< destr, will be called when singleton is killed when global m_obj dies. will kill theads etc
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private:
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data_logger(); ///< constructor is private, use only via singleton get_instance
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public:
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data_logger(const data_logger &ob) = delete; // use only one per program
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data_logger(data_logger &&ob) = delete;
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data_logger & operator=(const data_logger&) = delete;
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data_logger & operator=(data_logger&&) = delete;
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void add_data(std::string filename, unsigned int data); ///< use this to append data here. Use it only the singleton. It locks itself.
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static std::atomic<bool> m_save_graph; ///< global setting flag, should we save all the data or not (can disable logging graphs data)
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static bool is_dying();
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private:
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static std::once_flag m_singleton; ///< to guarantee singleton creates the object exactly once
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static data_logger_state m_state; ///< state of the singleton object
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static std::atomic<bool> m_thread_maybe_running; ///< is the background thread (more or less) running, or is it fully finished
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static std::unique_ptr<data_logger> m_obj; ///< the singleton object. Only use it via get_instance(). Can be killed by kill_instance()
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/***
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* one graph/file with data
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*/
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class fileData {
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public:
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fileData() = default;
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fileData(const fileData &ob) = delete;
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fileData(std::string pFile);
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std::shared_ptr<std::ofstream> mFile;
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long int mDataToSave = 0; ///< sum of the data (in current interval, will be counted from 0 on next interval)
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static double get_current_time();
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void save();
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std::string mPath;
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bool mLimitFile = false; ///< this holds a number (that is not additive) - e.g. the limit setting
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};
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std::map<std::string, fileData> mFilesMap;
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std::mutex mMutex;
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void saveToFile(); ///< write data to the target files. do not use this directly
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};
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} // namespace
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} // namespace
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#endif
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