Merge pull request #600 from tr8dr/master
[mono.git] / 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 #if MONOTOUCH
32                 public static bool IsMacOS {
33                         get { return true; }
34                 }
35 #else
36                 [DllImport ("libc")]
37                 static extern int uname (IntPtr buf);
38                 
39                 static bool checkedIsMacOS;
40                 static bool isMacOS;
41                 
42                 public static bool IsMacOS {
43                         get {
44                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
45                                         return false;
46
47                                 if (!checkedIsMacOS) {
48                                         IntPtr buf = Marshal.AllocHGlobal (8192);
49                                         if (uname (buf) == 0) {
50                                                 string os = Marshal.PtrToStringAnsi (buf);
51                                                 if (os == "Darwin")
52                                                         isMacOS = true;
53                                         }
54                                         Marshal.FreeHGlobal (buf);
55                                         checkedIsMacOS = true;
56                                 }
57                                 
58                                 return isMacOS;
59                         }
60                 }
61 #endif
62         }
63 }