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counted_base.hpp - Hosted on DriveHQ Cloud IT Platform
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Ruta de la carpeta: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\statechart\detail\counted_base.hpp
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#ifndef BOOST_STATECHART_DETAIL_COUNTED_BASE_HPP_INCLUDED #define BOOST_STATECHART_DETAIL_COUNTED_BASE_HPP_INCLUDED ////////////////////////////////////////////////////////////////////////////// // Copyright 2002-2006 Andreas Huber Doenni // Distributed under the Boost Software License, Version 1.0. (See accompany- // ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) ////////////////////////////////////////////////////////////////////////////// #include
#include
// BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP namespace boost { namespace statechart { namespace detail { template< bool NeedsLocking > struct count_base { count_base() : count_( 0 ) {} mutable boost::detail::atomic_count count_; }; template<> struct count_base< false > { count_base() : count_( 0 ) {} mutable long count_; }; ////////////////////////////////////////////////////////////////////////////// template< bool NeedsLocking = true > class counted_base : private count_base< NeedsLocking > { typedef count_base< NeedsLocking > base_type; public: ////////////////////////////////////////////////////////////////////////// bool ref_counted() const { return base_type::count_ != 0; } long ref_count() const { return base_type::count_; } protected: ////////////////////////////////////////////////////////////////////////// counted_base() {} ~counted_base() {} // do nothing copy implementation is intentional (the number of // referencing pointers of the source and the destination is not changed // through the copy operation) counted_base( const counted_base & ) {} counted_base & operator=( const counted_base & ) { return *this; } public: ////////////////////////////////////////////////////////////////////////// // The following declarations should be private. // They are only public because many compilers lack template friends. ////////////////////////////////////////////////////////////////////////// void add_ref() const { ++base_type::count_; } bool release() const { BOOST_ASSERT( base_type::count_ > 0 ); return --base_type::count_ == 0; } }; } // namespace detail } // namespace statechart } // namespace boost #endif
counted_base.hpp
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