more socket cleanup to allow using wxSocket from both wxBase and wxCore (replaces patch 1756260)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50831 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/apptbase.h

@@ -45,10 +45,32 @@ public:
     // the GUI code, WAIT_OBJECT_0 + 1 if a Windows message arrived
     virtual WXDWORD WaitForThread(WXHANDLE hThread) = 0;
 
+
+    // wxSocket support
+    // ----------------
+
+#if wxUSE_SOCKETS
+    // this function is used by wxNet library to set the default socket manager
+    // to use: doing it like this allows us to keep all socket-related code in
+    // wxNet instead of having to pull it in wxBase itself as we'd have to do
+    // if we really implemented GSocketManager here
+    //
+    // we don't take ownership of this pointer, it should have a lifetime
+    // greater than that of any socket (e.g. be a pointer to a static object)
+    static void SetDefaultSocketManager(GSocketManager *manager)
+    {
+        ms_manager = manager;
+    }
+
+    virtual GSocketManager *GetSocketManager() { return ms_manager; }
+#endif // wxUSE_SOCKETS
+
 protected:
     // implementation of WaitForThread() for the console applications which is
     // also used by the GUI code if it doesn't [yet|already} dispatch events
     WXDWORD DoSimpleWaitForThread(WXHANDLE hThread);
+
+    static GSocketManager *ms_manager;
 };
 
 #endif // _WX_MSW_APPTBASE_H_