88 lines
2.7 KiB
C#
88 lines
2.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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namespace Common
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{
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public class CPUData
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{
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public static PerformanceCounter cpuCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total");
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public static double GetCPU()
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{
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try
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{
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cpuCounter.NextValue(); // 初始化计数器，让它开始计数
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System.Threading.Thread.Sleep(1000); // 等待一秒
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double cpuUsage = cpuCounter.NextValue(); // 获取CPU使用率
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return cpuUsage;
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}
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catch (Exception ex)
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{
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throw;
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}
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}
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[DllImport("kernel32.dll")]
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private static extern void GetSystemTimePreciseAsFileTime(out long fileTime);
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// 将 FILETIME (long) 转换为 DateTime
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public static DateTime GetNowPrecise()
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{
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long fileTime;
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GetSystemTimePreciseAsFileTime(out fileTime);
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DateTime localTime = DateTime.FromFileTimeUtc(fileTime).ToLocalTime();
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return localTime;
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}
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}
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public class CpuMonitor
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{
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// 将静态初始化改为延迟加载，并将异常处理移至初始化时
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private static PerformanceCounter _cpuCounter = null;
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private static readonly object _lock = new object();
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private static Exception _initException = null;
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private static void InitializeCounter()
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{
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if (_initException != null) throw _initException;
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if (_cpuCounter != null) return;
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lock (_lock)
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{
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if (_cpuCounter != null) return;
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try
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{
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// 尝试创建计数器
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_cpuCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total");
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// 立即调用一次 NextValue 来初始化
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_cpuCounter.NextValue();
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}
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catch (Exception ex)
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{
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throw _initException;
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}
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}
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}
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public static double GetCurrentCpuUsage()
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{
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try
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{
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CpuMonitor.InitializeCounter(); // 确保计数器已初始化
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_cpuCounter.NextValue(); // 首次调用返回0，用于初始化本次采样
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System.Threading.Thread.Sleep(1000); // 等待采样间隔
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return _cpuCounter.NextValue(); // 返回过去一秒内的平均使用率
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}
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catch
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{
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// 记录日志或返回一个错误标识值，例如 -1
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return -1;
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}
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}
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}
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}
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