C++ glog demo

#include "CustomLogSink.h" #include <sstream> #include <iostream> #include <chrono> #include <iomanip> #include <string> #include <codecvt> CustomLogSink::CustomLogSink(const std::string& base_filename) : base_filename_(base_filename) { UpdateLogFile(); } void CustomLogSink::send(google::LogSeverity severity, const char* full_filename, const char* base_filename, int line, const struct ::tm* tm_time, const char* message, size_t message_len) { std::lock_guard<std::mutex> lock(mutex_); // 检查是否需要更新日志文件 UpdateLogFile(); // 写入日志消息 log_file_ << "[" << google::GetLogSeverityName(severity) << "] " << GetCurrentTimeWithMilliseconds() << ": " << message; } void CustomLogSink::UpdateLogFile() { time_t now = time(nullptr); struct tm now_tm; localtime_s(&now_tm, &now); if (now_tm.tm_mday != last_day_) { if (log_file_.is_open()) { log_file_.close(); } std::string log_filename = base_filename_; log_file_.open(log_filename, std::ios_base::app); last_day_ = now_tm.tm_mday; } } std::string CustomLogSink::GetCurrentTimeWithMilliseconds() { // 获取当前系统时间点 auto now = std::chrono::system_clock::now(); // 转换为time_t时间类型 auto now_as_time_t = std::chrono::system_clock::to_time_t(now); // 转换为tm结构 struct tm timeinfo; localtime_s(&timeinfo, &now_as_time_t); // 使用localtime_s为了线程安全 // 获取当前时间的毫秒部分 auto milliseconds = std::chrono::duration_cast<std::chrono::milliseconds>( now.time_since_epoch()) % 1000; // 使用wstringstream进行格式化 std::wstringstream wss; wss << std::put_time(&timeinfo, L"%Y-%m-%d %H:%M:%S") << L'.' << std::setfill(L'0') << std::setw(3) << milliseconds.count(); std::wstring wstr = wss.str(); std::wstring_convert<std::codecvt_utf8<wchar_t>> converter; return converter.to_bytes(wstr); }