--- /dev/null
+/*
+ * Porting wine comtrl32 to ReactOS comctrl32 support functions
+ *
+ * Copyright 2002 Robert Dickenson
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <windows.h>
+#include "porting.h"
+
+
+static int interlocked_mutex;
+void _lwp_mutex_lock(int* interlocked_mutex) {}
+void _lwp_mutex_unlock(int* interlocked_mutex) {}
+
+long interlocked_xchg_add( long *dest, long incr )
+{
+ long retv;
+ _lwp_mutex_lock( &interlocked_mutex );
+ retv = *dest;
+ *dest += incr;
+ _lwp_mutex_unlock( &interlocked_mutex );
+ return retv;
+}
+