// Copyright (C) 2001-2003 | |
// Mac Murrett | |
// | |
// Distributed under the Boost Software License, Version 1.0. (See | |
// accompanying file LICENSE_1_0.txt or copy at | |
// http://www.boost.org/LICENSE_1_0.txt) | |
// | |
// See http://www.boost.org for most recent version including documentation. | |
#ifndef BOOST_SINGLETON_MJM012402_HPP | |
#define BOOST_SINGLETON_MJM012402_HPP | |
#include <boost/thread/detail/config.hpp> | |
namespace boost { | |
namespace detail { | |
namespace thread { | |
// class singleton has the same goal as all singletons: create one instance of | |
// a class on demand, then dish it out as requested. | |
template <class T> | |
class singleton : private T | |
{ | |
private: | |
singleton(); | |
~singleton(); | |
public: | |
static T &instance(); | |
}; | |
template <class T> | |
inline singleton<T>::singleton() | |
{ | |
/* no-op */ | |
} | |
template <class T> | |
inline singleton<T>::~singleton() | |
{ | |
/* no-op */ | |
} | |
template <class T> | |
/*static*/ T &singleton<T>::instance() | |
{ | |
// function-local static to force this to work correctly at static | |
// initialization time. | |
static singleton<T> s_oT; | |
return(s_oT); | |
} | |
} // namespace thread | |
} // namespace detail | |
} // namespace boost | |
#endif // BOOST_SINGLETON_MJM012402_HPP |