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// A model of the Lockable concept from Boost.Thread which
// does nothing.  It can be passed as the Mutex template parameter
// for a signal, if the user wishes to disable thread-safety
// (presumably for performance reasons).

// Copyright Frank Mori Hess 2008.
// Distributed under the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at

// See for library home page.


namespace boost {
  namespace signals2 {
    class dummy_mutex
      void lock() {}
      bool try_lock() {return true;}
      void unlock() {}
  } // end namespace signals2
} // end namespace boost