mcs/class/System/System/Platform.cs

   1 //
   2 // System.Platform
   3 //
   4 // Copyright (C) 2011-2013 Xamarin Inc. (www.xamarin.com)
   5 //
   6 // Permission is hereby granted, free of charge, to any person obtaining
   7 // a copy of this software and associated documentation files (the
   8 // "Software"), to deal in the Software without restriction, including
   9 // without limitation the rights to use, copy, modify, merge, publish,
  10 // distribute, sublicense, and/or sell copies of the Software, and to
  11 // permit persons to whom the Software is furnished to do so, subject to
  12 // the following conditions:
  13 //
  14 // The above copyright notice and this permission notice shall be
  15 // included in all copies or substantial portions of the Software.
  16 //
  17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  21 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24 //
  25
  26 using System;
  27 using System.Runtime.InteropServices;
  28
  29 namespace System {
  30         internal static class Platform {
  31                 static bool checkedOS;
  32                 static bool isMacOS;
  33                 static bool isFreeBSD;
  34
  35 #if MONOTOUCH || XAMMAC
  36                 private static void CheckOS() {
  37                         isMacOS = true;
  38                         checkedOS = true;
  39                 }
  40 #else
  41                 [DllImport ("libc")]
  42                 static extern int uname (IntPtr buf);
  43
  44                 private static void CheckOS() {
  45                         if (Environment.OSVersion.Platform != PlatformID.Unix) {
  46                                 checkedOS = true;
  47                                 return;
  48                         }
  49
  50                         IntPtr buf = Marshal.AllocHGlobal (8192);
  51                         if (uname (buf) == 0) {
  52                                 string os = Marshal.PtrToStringAnsi (buf);
  53                                 switch (os) {
  54                                 case "Darwin":
  55                                         isMacOS = true;
  56                                         break;
  57                                 case "FreeBSD":
  58                                         isFreeBSD = true;
  59                                         break;
  60                                 }
  61                         }
  62                         Marshal.FreeHGlobal (buf);
  63                         checkedOS = true;
  64                 }
  65 #endif
  66
  67                 public static bool IsMacOS {
  68                         get {
  69                                 if (!checkedOS)
  70                                         CheckOS();
  71                                 return isMacOS;
  72                         }
  73                 }
  74
  75                 public static bool IsFreeBSD {
  76                         get {
  77                                 if (!checkedOS)
  78                                         CheckOS();
  79                                 return isFreeBSD;
  80                         }
  81                 }
  82         }
  83 }