5.3

1 files changed, 9 insertions, 15 deletions

diff --git a/zen/win_ver.h b/zen/win_ver.h
index 464b7264..c2162c61 100644
--- a/zen/win_ver.h
+++ b/zen/win_ver.h
@@ -27,35 +27,29 @@ bool win7OrLater();
 
 
 
+//######################### implementation #########################
+//version overview: http://msdn.microsoft.com/en-us/library/ms724834(VS.85).aspx
 
+//2000        is version 5.0
+//XP          is version 5.1
+//Server 2003 is version 5.2
+//Vista       is version 6.0
+//Seven       is version 6.1
 
-
-
-
-
-//######################### implementation #########################
 namespace impl
 {
 inline
-bool winXyOrLater(DWORD major, DWORD minor) //migrate: hold version data as static variable, as soon as C++11 thread safe statics are available in VS
+bool winXyOrLater(DWORD major, DWORD minor)
 {
     OSVERSIONINFO osvi = {};
     osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
-    if (::GetVersionEx(&osvi))
+    if (::GetVersionEx(&osvi)) //38 ns per call! (yes, that's nano!) -> we do NOT miss C++11 thread safe statics right now...
         return osvi.dwMajorVersion > major ||
                (osvi.dwMajorVersion == major && osvi.dwMinorVersion >= minor);
     return false;
 }
 }
 
-//version overview: http://msdn.microsoft.com/en-us/library/ms724834(VS.85).aspx
-
-//2000        is version 5.0
-//XP          is version 5.1
-//Server 2003 is version 5.2
-//Vista       is version 6.0
-//Seven       is version 6.1
-
 inline
 bool winXpOrLater() { return impl::winXyOrLater(5, 1); }