spdlog封装使用

使用spdlog:

拉取官网spdlog代码，在项目中引入include路径（仅头文件，编译器需要支持C++11）
spdlog地址：https://github.com/gabime/spdlog
官方详细文档：https://github.com/gabime/spdlog/wiki

简单封装：

// Log.h

#pragma once

#include "spdlog/spdlog.h"
#include "spdlog/async.h"
#include "spdlog/sinks/daily_file_sink.h"


#ifdef _WIN32
#define __FILENAME__ (strrchr(__FILE__, '\\') ? (strrchr(__FILE__, '\\') + 1):__FILE__)
#else
#define __FILENAME__ (strrchr(__FILE__, '/') ? (strrchr(__FILE__, '/') + 1):__FILE__)
#endif

#define SPDLOG_LOGGER_CALL_(LV, ...) if (auto logger = SpdLog::Instance().logger[LV]) logger->log(spdlog::source_loc{__FILENAME__, __LINE__, SPDLOG_FUNCTION}, LV, __VA_ARGS__)
#define LogTrace(...)  SPDLOG_LOGGER_CALL_(spdlog::level::trace,__VA_ARGS__)
#define LogDebug(...)  SPDLOG_LOGGER_CALL_(spdlog::level::debug,__VA_ARGS__)
#define LogInfo(...)   SPDLOG_LOGGER_CALL_(spdlog::level::info,__VA_ARGS__)
#define LogWarn(...)   SPDLOG_LOGGER_CALL_(spdlog::level::warn,__VA_ARGS__)
#define LogError(...)  SPDLOG_LOGGER_CALL_(spdlog::level::err,__VA_ARGS__)
#define LogCritical(...) SPDLOG_LOGGER_CALL_(spdlog::level::critical,__VA_ARGS__)

class SpdLog {

public:
    std::shared_ptr<spdlog::logger> logger[spdlog::level::n_levels]{ nullptr };
    static SpdLog& Instance() {
        static SpdLog log;
        return log;
    }
	// Windows + async日志记录，确保在main()函数退出时调用spdlog::shutdown()函数
    static void Clear() {
        spdlog::drop_all();
        spdlog::shutdown();
    }
private:

    SpdLog() {
        // 初始化log等级
        InitSpdLog(spdlog::level::debug);
    }
    ~SpdLog() {
        Clear();
    }
    SpdLog(const SpdLog& other) = delete;
    SpdLog& operator=(const SpdLog& other) = delete;

    void InitSpdLog(spdlog::level::level_enum level = spdlog::level::trace, const char* logDir = "./log/") {
        const char* levelStr;
        char        fileName[255];
        // 设置当出发 warn 或更严重的错误时立刻刷新日志
        spdlog::flush_on(spdlog::level::warn);
        // 设置刷新间隔
        spdlog::flush_every(std::chrono::seconds(2));
        // 设置日志记录级别
        spdlog::set_level(static_cast<spdlog::level::level_enum>(level));
        // 设置日志格式
        spdlog::set_pattern("[%Y-%m-%d %H:%M:%S.%e][%P:%t] %v [%@:%!]");

        // 创建异步日志，
#define CraeteLogger(LV)\
    levelStr = spdlog::level::to_string_view((spdlog::level::level_enum)LV).data();\
    fmt::format_to(fileName, "{}{}.log{}", logDir, levelStr,'\0');\
    logger[LV] = spdlog::daily_logger_mt<spdlog::async_factory>(levelStr, fileName, 23, 58);\

        switch (level) {
        case spdlog::level::trace:
            CraeteLogger(spdlog::level::trace);
            [[fallthrough]];
        case spdlog::level::debug:
            CraeteLogger(spdlog::level::debug);
            [[fallthrough]];
        case spdlog::level::info:
            CraeteLogger(spdlog::level::info);
            [[fallthrough]];
        case spdlog::level::warn:
            CraeteLogger(spdlog::level::warn);
            [[fallthrough]];
        case spdlog::level::err:
            CraeteLogger(spdlog::level::err);
            [[fallthrough]];
        case spdlog::level::critical:
            CraeteLogger(spdlog::level::critical);
            [[fallthrough]];
        case spdlog::level::off:
            break;
        case spdlog::level::n_levels:
            break;
        default:
            break;
        }
    };
};

注意：

Windows + async日志记录，一定要确保在main()函数退出时调用spdlog::shutdown()函数
否则退出时会导致应用程序死锁