add compile flag to disable managed IO on !windows

Author: myeisha

.gitignore

@@ -32,3 +32,4 @@ libtool
 configure
 *.pc
 missing
+.*.swp

Makefile.am

@@ -1,4 +1,6 @@
 
+export IO_COMPILE_FLAGS:=@IO_COMPILE_FLAGS@
+
 ACLOCAL_AMFLAGS = -I m4
 
 SUBDIRS = man src scripts docs data

configure.ac

@@ -50,6 +50,14 @@ AS_IF([test "x$with_gnutls" = xyes],
 		 fi],
 		[])])
 
+AC_ARG_ENABLE([native-io],
+	[AS_HELP_STRING([--disable-native-io],
+		[disable support for native IO backends in Manos.IO])],
+	[IO_COMPILE_FLAGS=FORCE_MANAGED_IO],
+	[IO_COMPILE_FLAGS=])
+
+AC_SUBST(IO_COMPILE_FLAGS)
+
 
 
 	dnl ******************************************************************

src/Manos.IO/Manos.IO.csproj

@@ -29,6 +29,9 @@
     <WarningLevel>4</WarningLevel>
     <ConsolePause>false</ConsolePause>
   </PropertyGroup>
+  <PropertyGroup Condition=" '$(IO_COMPILE_FLAGS)' == 'FORCE_MANAGED_IO' ">
+	  <DefineConstants>ALWAYS_USE_MANAGED_IO</DefineConstants>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Core" />

src/Manos.IO/Manos.IO/Context.cs

@@ -15,19 +15,23 @@ protected Context ()
 			Dispose (false);
 		}
 
-		private static readonly bool isWindows;
+		private static readonly bool useManagedImpl;
 
 		static Context ()
 		{
-			isWindows = Environment.OSVersion.Platform == PlatformID.Win32NT
+#if ALWAYS_USE_MANAGED_IO
+			useManagedImpl = true;
+#else
+			useManagedImpl = Environment.OSVersion.Platform == PlatformID.Win32NT
 				|| Environment.OSVersion.Platform == PlatformID.Win32S
 				|| Environment.OSVersion.Platform == PlatformID.Win32Windows
 				|| Environment.OSVersion.Platform == PlatformID.WinCE;
+#endif
 		}
 
 		public static Context Create ()
 		{
-			if (isWindows) {
+			if (useManagedImpl) {
 				return new Manos.IO.Managed.Context ();
 			} else {
 				return new Manos.IO.Libev.Context ();