ceph/src/boost/boost/signals2/dummy_mutex.hpp

   1 // A model of the Lockable concept from Boost.Thread which
   2 // does nothing.  It can be passed as the Mutex template parameter
   3 // for a signal, if the user wishes to disable thread-safety
   4 // (presumably for performance reasons).
   5
   6 // Copyright Frank Mori Hess 2008.
   7 // Distributed under the Boost Software License, Version
   8 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10
  11 // See http://www.boost.org/libs/signals2 for library home page.
  12
  13 #ifndef BOOST_SIGNALS2_DUMMY_MUTEX_HPP
  14 #define BOOST_SIGNALS2_DUMMY_MUTEX_HPP
  15
  16 namespace boost {
  17   namespace signals2 {
  18     class dummy_mutex
  19     {
  20     public:
  21       void lock() {}
  22       bool try_lock() {return true;}
  23       void unlock() {}
  24     };
  25   } // end namespace signals2
  26 } // end namespace boost
  27
  28 #endif // BOOST_SIGNALS2_DUMMY_MUTEX_HPP