update

Logger.cpp

@@ -0,0 +1,5 @@
+//
+// Created by 张衡 on 25-7-8.
+//
+
+#include "Logger.h"

Logger.h

@@ -0,0 +1,93 @@
+//
+// Created by 张衡 on 25-7-8.
+//
+
+#ifndef LOGGER_H
+#define LOGGER_H
+
+#include <queue>
+#include <mutex>
+#include <string>
+#include <condition_variable>
+#include <thread>
+#include <fstream>
+#include <atomic>
+#include <sstream>
+#include <vector>
+#include <stdexcept>
+
+
+
+//辅助函数，多个参数转化字符串
+template <typename T>
+std::string to_string_helper(T&& arg) {
+    std::ostringstream oss;
+    oss << std::forward<T>(arg);
+    return oss.str();
+}
+
+class LogQueue {
+public:
+    void push(const std::string& msg) {
+        std::lock_guard<std::mutex> lock(mutex_);
+        //构造好自动加锁，析构自动解锁
+        cond_var_.notify_one();
+    }; //字符串放队列中
+    bool pop(std::string& msg) {
+        std::unique_lock<std::mutex> lock(mutex_);
+        //条件变量唤醒之后直接加锁
+        cond_var_.wait(lock, [this]() {
+           return !queue_.empty() || is_shutdown_; //返回true就继续往下走
+        });
+        //消费逻辑
+        //队列不为空or已经关闭
+        if (is_shutdown_ && queue_.empty()) {
+            return false;
+        }
+        msg = queue_.front(); //返回消息给msg指针
+        queue_.pop();
+        return true;
+    };
+    void shutdown() {
+        std::lock_guard<std::mutex> lock(mutex_);
+        is_shutdown_ = true;
+        cond_var_.notify_all();
+    };
+private:
+    std::queue<std::string> queue_;
+    std::mutex mutex_;
+    std::condition_variable cond_var_;
+    bool is_shutdown_ = false;
+};
+
+class Logger {
+public:
+    Logger(const std::string& filename) : log_file_(filename, std::ios::out | std::ios::app)
+    , exit_flag_(false) {
+        if (!log_file_.is_open()) {
+            throw std::runtime_error("Failed to open log file");
+        }
+
+        worker_thread_ = std::thread([this]() {
+            std::string msg;
+            while (log_queue_.pop(msg)) {
+                log_file_ << msg << std::endl;
+            }
+        });
+    };
+    ~Logger();
+
+    template<typename ... Args>
+    void log(const std::string& format, Args&& ...args);
+
+private:
+    LogQueue log_queue_;
+    std::thread worker_thread_;
+    std::ofstream log_file_;
+    std::atomic<bool> exit_flag_;
+};
+
+
+
+
+#endif //LOGGER_H

main.cpp

@@ -1,20 +1,8 @@
 #include <iostream>
+#include "Logger.h"
 
-// 函数用于检测字节序
-bool isBigEndian() {
-    // 定义一个 16 位整数，值为 1
-    uint16_t num = 0x0001;
-    // 获取该整数的第一个字节的地址
-    uint8_t* ptr = reinterpret_cast<uint8_t*>(&num);
-    // 大端字节序下，第一个字节是 0
-    return *ptr == 0;
-}
 
 int main() {
-    if (isBigEndian()) {
-        std::cout << "当前系统是大端字节序。" << std::endl;
-    } else {
-        std::cout << "当前系统是小端字节序。" << std::endl;
-    }
+
     return 0;
 }