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sp_counted_base_solaris.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\detail\sp_counted_base_solaris.hpp
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#ifndef BOOST_DETAIL_SP_COUNTED_BASE_SOLARIS_HPP_INCLUDED #define BOOST_DETAIL_SP_COUNTED_BASE_SOLARIS_HPP_INCLUDED // // detail/sp_counted_base_solaris.hpp // based on: detail/sp_counted_base_w32.hpp // // Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd. // Copyright 2004-2005 Peter Dimov // Copyright 2006 Michael van der Westhuizen // // 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) // // // Lock-free algorithm by Alexander Terekhov // // Thanks to Ben Hitchings for the #weak + (#shared != 0) // formulation // #include "sp_typeinfo.hpp" #include
namespace boost { namespace detail { class sp_counted_base { private: sp_counted_base( sp_counted_base const & ); sp_counted_base & operator= ( sp_counted_base const & ); uint32_t use_count_; // #shared uint32_t weak_count_; // #weak + (#shared != 0) public: sp_counted_base(): use_count_( 1 ), weak_count_( 1 ) { } virtual ~sp_counted_base() // nothrow { } // dispose() is called when use_count_ drops to zero, to release // the resources managed by *this. virtual void dispose() = 0; // nothrow // destroy() is called when weak_count_ drops to zero. virtual void destroy() // nothrow { delete this; } virtual void * get_deleter( sp_typeinfo const & ti ) = 0; void add_ref_copy() { atomic_inc_32( &use_count_ ); } bool add_ref_lock() // true on success { for( ;; ) { uint32_t tmp = static_cast< uint32_t const volatile& >( use_count_ ); if( tmp == 0 ) return false; if( atomic_cas_32( &use_count_, tmp, tmp + 1 ) == tmp ) return true; } } void release() // nothrow { if( atomic_dec_32_nv( &use_count_ ) == 0 ) { dispose(); weak_release(); } } void weak_add_ref() // nothrow { atomic_inc_32( &weak_count_ ); } void weak_release() // nothrow { if( atomic_dec_32_nv( &weak_count_ ) == 0 ) { destroy(); } } long use_count() const // nothrow { return static_cast
( use_count_ ); } }; } // namespace detail } // namespace boost #endif // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_SOLARIS_HPP_INCLUDED
sp_counted_base_solaris.hpp
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