netcore/System.Private.CoreLib/shared/System/HighPerformanceCounter.Windows.cs

   1 // Licensed to the .NET Foundation under one or more agreements.
   2 // The .NET Foundation licenses this file to you under the MIT license.
   3 // See the LICENSE file in the project root for more information.
   4
   5 namespace System
   6 {
   7     internal static unsafe class HighPerformanceCounter
   8     {
   9         public static ulong TickCount
  10         {
  11             get
  12             {
  13                 long counter;
  14                 Interop.Kernel32.QueryPerformanceCounter(&counter);
  15                 return (ulong)counter;
  16             }
  17         }
  18
  19         public static ulong Frequency { get; } = GetFrequency();
  20
  21         private static ulong GetFrequency()
  22         {
  23             long frequency;
  24             Interop.Kernel32.QueryPerformanceFrequency(&frequency);
  25             return (ulong)frequency;
  26         }
  27     }
  28 }