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diff --git a/include/ki_mutex.h b/include/ki_mutex.h
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+++ b/include/ki_mutex.h
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+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2013-2014 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
+ * Copyright (C) 1992-2014 KiCad Developers, see CHANGELOG.TXT for contributors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#ifndef KI_MUTEX_H_
+#define KI_MUTEX_H_
+
+
+/// Establish KiCad MUTEX choices here in this file:
+///    typedef MUTEX and typedef MUTLOCK.
+///
+/// Using an unnamed resource is easier, providing a textual name for a
+/// constructor is cumbersome, so we make choice on that criteria mostly:
+
+#if 1
+
+// This is a fine choice between the two, but requires linking to ${Boost_LIBRARIES}
+
+#include <boost/interprocess/sync/interprocess_mutex.hpp>
+#include <boost/interprocess/sync/scoped_lock.hpp>
+
+typedef boost::interprocess::interprocess_mutex     MUTEX;
+typedef boost::interprocess::scoped_lock<MUTEX>     MUTLOCK;
+
+#else
+
+// This choice also works.
+
+#include <wx/thread.h>
+
+typedef wxMutex             MUTEX;
+typedef wxMutexLocker       MUTLOCK;
+
+#endif
+
+#endif  // KI_MUTEX_H_