Oops, we need Platform.cs too

diff --git a/mcs/class/System/System/Platform.cs b/mcs/class/System/System/Platform.cs
new file mode 100644 (file)
index 0000000..4e71154
--- /dev/null
+++ b/mcs/class/System/System/Platform.cs
@@ -0,0 +1,53 @@
+//
+// System.Platform
+//
+// Copyright (C) 2011 Xamarin, Inc. (www.xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System.Runtime.InteropServices;
+
+namespace System {
+       internal class Platform {
+               [DllImport ("libc")]
+               static extern int uname (IntPtr buf);
+               
+               static bool checkedIsMacOS;
+               static bool isMacOS;
+               
+               public static bool IsMacOS {
+                       get {
+                               if (!checkedIsMacOS) {
+                                       IntPtr buf = Marshal.AllocHGlobal (8192);
+                                       if (uname (buf) == 0) {
+                                               string os = Marshal.PtrToStringAnsi (buf);
+                                               if (os == "Darwin")
+                                                       isMacOS = true;
+                                       }
+                                       Marshal.FreeHGlobal (buf);
+                                       checkedIsMacOS = true;
+                               }
+                               
+                               return isMacOS;
+                       }
+               }
+       }
+}