ch4_14.cs

《c#技术内幕代码》

using System;
using System.Runtime.InteropServices;


class CH4_14
{
   [System.Runtime.InteropServices.StructLayoutAttribute (LayoutKind.Sequential, CharSet=CharSet.Auto)]
   public struct _SYSTEM_INFO
   { 
      public int dwOemID; 
      public int dwPageSize;
      public int lpMinimumApplicationAddress; 
      public int lpMaximumApplicationAddress; 
      public int dwActiveProcessorMask; 
      public int dwNumberOfProcessors;
      public int dwProcessorType;
      public int dwAllocationGranularity;
      public short wProcessorLevel;
      public short wProcessorRevision;
   }

   [sysimport(dll="Kernel32.dll")]
      unsafe private static extern void GetSystemInfo([marshal(UnmanagedType.LPVoid)]uint* bufptr);
   
   public static unsafe void Main()
   {
       try
       {
          _SYSTEM_INFO si = new _SYSTEM_INFO();
          GetSystemInfo( (uint *)&si );
          Console.WriteLine("Processor Type = {0}", si.dwProcessorType );
          Console.WriteLine("Number of Processors = {0}", si.dwNumberOfProcessors );
          Console.WriteLine("Processor Level = {0}", si.wProcessorLevel );
          Console.WriteLine("Processor Revision = {0}", si.wProcessorRevision );
       }
       catch ( Exception e )
       {
          Console.WriteLine("Exception Caught! {0}", e );
       }
   }
   
}