netcore/System.Private.CoreLib/shared/Interop/Windows/Kernel32/Interop.GetEnvironmentVariable.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 using System;
   6 using System.Runtime.InteropServices;
   7
   8 internal static partial class Interop
   9 {
  10     internal static partial class Kernel32
  11     {
  12         internal static unsafe int GetEnvironmentVariable(string lpName, Span<char> buffer)
  13         {
  14             fixed (char* bufferPtr = &MemoryMarshal.GetReference(buffer))
  15             {
  16                 return GetEnvironmentVariable(lpName, bufferPtr, buffer.Length);
  17             }
  18         }
  19
  20         [DllImport(Libraries.Kernel32, EntryPoint = "GetEnvironmentVariableW", SetLastError = true, CharSet = CharSet.Unicode)]
  21         private static extern unsafe int GetEnvironmentVariable(string lpName, char* lpBuffer, int nSize);
  22     }
  23 }