core_logging.cpp

static void AtExitWrapper()
{
    spdlog::info("Terminated");
    spdlog::shutdown();
}

void SetupAsyncDiskLog(const std::string& filename)
{
    spdlog::init_thread_pool(8192, 1);
    auto stdout_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt>();
    auto rotating_sink = std::make_shared<spdlog::sinks::rotating_file_sink_mt>(
        filename,
        4*1024*1024,
        3);
    std::vector<spdlog::sink_ptr> sinks {
        stdout_sink,
        rotating_sink
    };
    auto logger = std::make_shared<spdlog::async_logger>(
        filename,
        sinks.begin(), sinks.end(),
        spdlog::thread_pool(),
        spdlog::async_overflow_policy::overrun_oldest);
        //spdlog::async_overflow_policy::block);
    spdlog::register_logger(logger);

    spdlog::set_default_logger(logger);

    spdlog::set_pattern("[%H:%M:%S %z] [%^%L%$] %v");

    spdlog::set_level(spdlog::level::debug); // Set global log level to debug

    // Register an atexit() callback so we do not need manual shutdown in app code
    std::atexit(AtExitWrapper);
}