ceph/src/boost/boost/test/utils/trivial_singleton.hpp

   1 //  (C) Copyright Gennadiy Rozental 2001.
   2 //  Distributed under the Boost Software License, Version 1.0.
   3 //  (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See http://www.boost.org/libs/test for the library home page.
   7 //
   8 //  File        : $RCSfile$
   9 //
  10 //  Version     : $Revision$
  11 //
  12 //  Description : simple helpers for creating cusom output manipulators
  13 // ***************************************************************************
  14
  15 #ifndef BOOST_TEST_UTILS_TRIVIAL_SIGNLETON_HPP
  16 #define BOOST_TEST_UTILS_TRIVIAL_SIGNLETON_HPP
  17
  18 // Boost.Test
  19 #include <boost/config.hpp>
  20 #include <boost/detail/workaround.hpp>
  21
  22 // Boost
  23 #include <boost/test/detail/suppress_warnings.hpp>
  24
  25 //____________________________________________________________________________//
  26
  27 namespace boost {
  28 namespace unit_test {
  29
  30 // ************************************************************************** //
  31 // **************                   singleton                  ************** //
  32 // ************************************************************************** //
  33
  34 template<typename Derived>
  35 class singleton {
  36 public:
  37     static Derived& instance() { static Derived the_inst; return the_inst; }
  38
  39     BOOST_DELETED_FUNCTION(singleton(singleton const&))
  40     BOOST_DELETED_FUNCTION(singleton& operator=(singleton const&))
  41
  42 protected:
  43     BOOST_DEFAULTED_FUNCTION(singleton(), {})
  44     BOOST_DEFAULTED_FUNCTION(~singleton(), {})
  45 };
  46
  47 //____________________________________________________________________________//
  48
  49 #define BOOST_TEST_SINGLETON_CONS( type )       \
  50 friend class boost::unit_test::singleton<type>; \
  51 type() {}                                       \
  52 /**/
  53
  54 #if BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042))
  55
  56 #define BOOST_TEST_SINGLETON_INST( inst ) \
  57 template class unit_test::singleton< BOOST_JOIN( inst, _t ) > ; \
  58 namespace { BOOST_JOIN( inst, _t)& inst = BOOST_JOIN( inst, _t)::instance(); }
  59
  60 #elif defined(__APPLE_CC__) && defined(__GNUC__) && __GNUC__ < 4
  61 #define BOOST_TEST_SINGLETON_INST( inst ) \
  62 static BOOST_JOIN( inst, _t)& inst = BOOST_JOIN (inst, _t)::instance();
  63
  64 #else
  65
  66 #define BOOST_TEST_SINGLETON_INST( inst ) \
  67 namespace { BOOST_JOIN( inst, _t)& inst = BOOST_JOIN( inst, _t)::instance(); }
  68
  69 #endif
  70
  71 //____________________________________________________________________________//
  72
  73 } // namespace unit_test
  74 } // namespace boost
  75
  76
  77 #include <boost/test/detail/enable_warnings.hpp>
  78
  79 #endif // BOOST_TEST_UTILS_TRIVIAL_SIGNLETON_HPP