เข้ากันได้กับ. Net และ Mono (ทดสอบด้วย Win10 / FreeBSD / CentOS)
การใช้ComputerInfo
ซอร์สโค้ดและPerformanceCounter
s สำหรับ Mono และเป็นข้อมูลสำรองสำหรับ. Net:
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Security;
public class SystemMemoryInfo
{
private readonly PerformanceCounter _monoAvailableMemoryCounter;
private readonly PerformanceCounter _monoTotalMemoryCounter;
private readonly PerformanceCounter _netAvailableMemoryCounter;
private ulong _availablePhysicalMemory;
private ulong _totalPhysicalMemory;
public SystemMemoryInfo()
{
try
{
if (PerformanceCounterCategory.Exists("Mono Memory"))
{
_monoAvailableMemoryCounter = new PerformanceCounter("Mono Memory", "Available Physical Memory");
_monoTotalMemoryCounter = new PerformanceCounter("Mono Memory", "Total Physical Memory");
}
else if (PerformanceCounterCategory.Exists("Memory"))
{
_netAvailableMemoryCounter = new PerformanceCounter("Memory", "Available Bytes");
}
}
catch
{
}
}
public ulong AvailablePhysicalMemory
{
[SecurityCritical]
get
{
Refresh();
return _availablePhysicalMemory;
}
}
public ulong TotalPhysicalMemory
{
[SecurityCritical]
get
{
Refresh();
return _totalPhysicalMemory;
}
}
[SecurityCritical]
[DllImport("Kernel32", CharSet = CharSet.Auto, SetLastError = true)]
private static extern void GlobalMemoryStatus(ref MEMORYSTATUS lpBuffer);
[SecurityCritical]
[DllImport("Kernel32", CharSet = CharSet.Auto, SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool GlobalMemoryStatusEx(ref MEMORYSTATUSEX lpBuffer);
[SecurityCritical]
private void Refresh()
{
try
{
if (_monoTotalMemoryCounter != null && _monoAvailableMemoryCounter != null)
{
_totalPhysicalMemory = (ulong) _monoTotalMemoryCounter.NextValue();
_availablePhysicalMemory = (ulong) _monoAvailableMemoryCounter.NextValue();
}
else if (Environment.OSVersion.Version.Major < 5)
{
var memoryStatus = MEMORYSTATUS.Init();
GlobalMemoryStatus(ref memoryStatus);
if (memoryStatus.dwTotalPhys > 0)
{
_availablePhysicalMemory = memoryStatus.dwAvailPhys;
_totalPhysicalMemory = memoryStatus.dwTotalPhys;
}
else if (_netAvailableMemoryCounter != null)
{
_availablePhysicalMemory = (ulong) _netAvailableMemoryCounter.NextValue();
}
}
else
{
var memoryStatusEx = MEMORYSTATUSEX.Init();
if (GlobalMemoryStatusEx(ref memoryStatusEx))
{
_availablePhysicalMemory = memoryStatusEx.ullAvailPhys;
_totalPhysicalMemory = memoryStatusEx.ullTotalPhys;
}
else if (_netAvailableMemoryCounter != null)
{
_availablePhysicalMemory = (ulong) _netAvailableMemoryCounter.NextValue();
}
}
}
catch
{
}
}
private struct MEMORYSTATUS
{
private uint dwLength;
internal uint dwMemoryLoad;
internal uint dwTotalPhys;
internal uint dwAvailPhys;
internal uint dwTotalPageFile;
internal uint dwAvailPageFile;
internal uint dwTotalVirtual;
internal uint dwAvailVirtual;
public static MEMORYSTATUS Init()
{
return new MEMORYSTATUS
{
dwLength = checked((uint) Marshal.SizeOf(typeof(MEMORYSTATUS)))
};
}
}
private struct MEMORYSTATUSEX
{
private uint dwLength;
internal uint dwMemoryLoad;
internal ulong ullTotalPhys;
internal ulong ullAvailPhys;
internal ulong ullTotalPageFile;
internal ulong ullAvailPageFile;
internal ulong ullTotalVirtual;
internal ulong ullAvailVirtual;
internal ulong ullAvailExtendedVirtual;
public static MEMORYSTATUSEX Init()
{
return new MEMORYSTATUSEX
{
dwLength = checked((uint) Marshal.SizeOf(typeof(MEMORYSTATUSEX)))
};
}
}
}