Added tests for Task.WhenAll w/ empty list
[mono.git] / mcs / class / System / System / Platform.cs
1 //
2 // System.Platform
3 //
4 // Copyright (C) 2011 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                 [DllImport ("libc")]
32                 static extern int uname (IntPtr buf);
33                 
34                 static bool checkedIsMacOS;
35                 static bool isMacOS;
36                 
37                 public static bool IsMacOS {
38                         get {
39                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
40                                         return false;
41
42                                 if (!checkedIsMacOS) {
43                                         IntPtr buf = Marshal.AllocHGlobal (8192);
44                                         if (uname (buf) == 0) {
45                                                 string os = Marshal.PtrToStringAnsi (buf);
46                                                 if (os == "Darwin")
47                                                         isMacOS = true;
48                                         }
49                                         Marshal.FreeHGlobal (buf);
50                                         checkedIsMacOS = true;
51                                 }
52                                 
53                                 return isMacOS;
54                         }
55                 }
56         }
57 }