spdlog源码解析

基础抽象

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sink

#level_t level_

+void log(const details::log_msg &msg)

+void flush()

+void set_pattern(const std::string &pattern)

+void set_formatter(std::unique_ptr sink_formatter)

+void set_level(level::level_enum log_level)

+level::level_enum level()

+bool should_log(level::level_enum msg_level)

formatter

+void format(const details::log_msg &msg, memory_buf_t &dest)

+std::unique_ptr clone()

其中sink中的log，flush，set_pattern，set_formatter为纯虚函数
formatter为虚类

base_sink

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base_sink

#unique_ptr formatter_

#Mutex mutex_

#void sink_it_(const details::log_msg &msg)

#void flush_()

#void set_pattern_(const std::string &pattern)

#void set_formatter_(std::unique_ptr sink_formatter)

sink

base_sink模板类继承了sink，模板参数提供了同步机制。其实现了基类中的log，flush，set_pattern和set_formatter抽象方法，log方法中会调用抽象方法sink_it_，flush方法调用抽象方法flush_

template <typename Mutex>
void SPDLOG_INLINE spdlog::sinks::base_sink<Mutex>::log(const details::log_msg &msg) {
    std::lock_guard<Mutex> lock(mutex_);
    sink_it_(msg);
}

template <typename Mutex>
void SPDLOG_INLINE spdlog::sinks::base_sink<Mutex>::flush() {
    std::lock_guard<Mutex> lock(mutex_);
    flush_();
}

template <typename Mutex>
void SPDLOG_INLINE spdlog::sinks::base_sink<Mutex>::set_pattern(const std::string &pattern) {
    std::lock_guard<Mutex> lock(mutex_);
    set_pattern_(pattern);
}

template <typename Mutex>
void SPDLOG_INLINE
spdlog::sinks::base_sink<Mutex>::set_formatter(std::unique_ptr<spdlog::formatter> sink_formatter) {
    std::lock_guard<Mutex> lock(mutex_);
    set_formatter_(std::move(sink_formatter));
}