ceph/src/boost/libs/pool/include/boost/pool/detail/mutex.hpp

   1 // Copyright (C) 2000 Stephen Cleary
   2 //
   3 // Distributed under the Boost Software License, Version 1.0. (See
   4 // accompanying file LICENSE_1_0.txt or copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // See http://www.boost.org for updates, documentation, and revision history.
   8
   9 #ifndef BOOST_POOL_MUTEX_HPP
  10 #define BOOST_POOL_MUTEX_HPP
  11
  12 #include <boost/config.hpp>  // for workarounds
  13 #if defined (BOOST_HAS_THREADS) && !defined(BOOST_POOL_NO_MT)
  14 #if defined (BOOST_NO_CXX11_HDR_MUTEX)
  15 #include <boost/thread/mutex.hpp>
  16 #else
  17 #include <mutex>
  18 #endif
  19 #endif
  20
  21 namespace boost{ namespace details{ namespace pool{
  22
  23 class null_mutex
  24 {
  25   private:
  26     null_mutex(const null_mutex &);
  27     void operator=(const null_mutex &);
  28
  29   public:
  30     null_mutex() { }
  31
  32     static void lock() { }
  33     static void unlock() { }
  34 };
  35
  36 #if !defined(BOOST_HAS_THREADS) || defined(BOOST_NO_MT) || defined(BOOST_POOL_NO_MT)
  37   typedef null_mutex default_mutex;
  38 #else
  39 #if defined (BOOST_NO_CXX11_HDR_MUTEX)
  40   typedef boost::mutex default_mutex;
  41 #else
  42   typedef std::mutex default_mutex;
  43 #endif
  44 #endif
  45
  46 } // namespace pool
  47 } // namespace details
  48 } // namespace boost
  49
  50 #endif