thread updates

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4648 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/os2/thread.cpp

@@ -239,6 +239,28 @@ void wxCondition::Broadcast()
     }
 }
 
+// ----------------------------------------------------------------------------
+// wxCriticalSection implementation
+// ----------------------------------------------------------------------------
+
+wxCriticalSection::wxCriticalSection()
+{
+}
+
+wxCriticalSection::~wxCriticalSection()
+{
+}
+
+void wxCriticalSection::Enter()
+{
+    ::DosEnterCritSec();
+}
+
+void wxCriticalSection::Leave()
+{
+    ::DosExitCritSec();
+}
+
 // ----------------------------------------------------------------------------
 // wxThread implementation
 // ----------------------------------------------------------------------------