CLogManager

A lightweight and easy-to-use C++ logging class that supports multi-threaded environments.

✨ Features

• C++-17 Standard, unicode character set
• Thread-safe class (Singleton access)
• Easy to use with macro function
• Various Log levels (TRACE, DEBUG, INFO, WARN, ERROR, FATAL)
• Automatic log file rotation (100 MB max per file)
• Logs stored in per-day folders (e.g., C:\MyLog\20250612)
• Configurable log level via log_conf.ini
• Only tested in Windows

📁 File Structure

• CLogManager.h – Header file for the logging manager
• CLogManager.cpp – Implementation file

🔧 Configuration

Write C:/MyLog/log_conf.ini with the following content:

[LOG_SETTING]
log_level = 1
# 0: trace, 1: debug, 2: info, 3: warn, 4: error, 5: fatal

🛠️ Usage

Include the header and Log a message

#include "CLogManager.h"

void callbackFuncB(const double& data)
{
    LOG_DEBUG("this is callback B");
    LOG_WARN("received data is : %f", data);
}

void callbackFuncA()
{
    LOG_INFO("this is callback A");

    // Possible Execption..
    LOG_ERROR("Error occured :(");
}

📂 Example Log Output

Logged path : C:\MyLog\20250612\20250612_134508.txt

[2025-06-12 13:45:30.112] [INFO] callbackFuncA (Line : 5) -> this is callback A
[2025-06-12 13:45:30.114] [DEBUG] callbackFuncB (Line : 2) -> this is callback B
[2025-06-12 13:45:30.113] [ERROR] callbackFuncA (Line : 8) -> Error occured :(
[2025-06-12 13:45:31.116] [WARN] callbackFuncB (Line : 3) -> received data is 123.45

📌 Notes

• Log files are automatically created inside daily folders C:\MyLog\YYYYMMDD.
• If a log file exceeds 100 MB, a new file with timestamp is created.
• Log output is buffered via an internal queue and flushed by a worker thread.
• Uses standard C++17 (<thread>, <mutex>, <chrono>, <filesystem>).

📄 License

This project is licensed under the MIT License – see the LICENSE file for details.

🧑‍💻 Author

• Name: Seongchang Park
• Email: scsc1125@gmail.com