+/*! ========================================================================
+** Extended Template and Library
+** NULL Mutex Abstraction Class Implementation
+** $Id$
+**
+** Copyright (c) 2002 Robert B. Quattlebaum Jr.
+**
+** This package 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 package 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.
+**
+** === N O T E S ===========================================================
+**
+** This is an internal header file, included by other ETL headers.
+** You should not attempt to use it directly.
+**
+** ========================================================================= */
+
+/* === S T A R T =========================================================== */
+
+#ifndef __ETL__MUTEX_NULL_H_
+#define __ETL__MUTEX_NULL_H_
+
+/* === H E A D E R S ======================================================= */
+/* === M A C R O S ========================================================= */
+
+/* === C L A S S E S & S T R U C T S ======================================= */
+
+_ETL_BEGIN_NAMESPACE
+
+class mutex_null
+{
+public:
+
+ mutex_null(){}
+ ~mutex_null(){}
+ //! Exception-safe mutex lock class
+/*
+ class lock
+ {
+ mutex *_mtx;
+ public:
+ lock(mutex &x):_mtx(&x) { _mtx->lock_mutex(); }
+ ~lock() { _mtx->unlock_mutex(); }
+ mutex &get() { return *_mtx; }
+ };
+*/
+ class lock
+ {
+ public:
+ lock(mutex_null &/*x*/) { }
+ };
+
+ void lock_mutex(){}
+ bool try_lock_mutex(){return true;}
+ void unlock_mutex(){}
+};
+
+_ETL_END_NAMESPACE
+
+/* === E X T E R N S ======================================================= */
+
+/* === E N D =============================================================== */
+
+#endif