#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_NT_HPP_INCLUDED
|
#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_NT_HPP_INCLUDED
|
|
// MS compatible compilers support #pragma once
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
|
# pragma once
|
#endif
|
|
//
|
// detail/sp_counted_base_nt.hpp
|
//
|
// Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
|
// Copyright 2004-2005 Peter Dimov
|
//
|
// 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)
|
//
|
|
#include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
|
#include <boost/smart_ptr/detail/sp_noexcept.hpp>
|
#include <boost/config.hpp>
|
#include <boost/cstdint.hpp>
|
|
#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
|
|
#include <boost/config/pragma_message.hpp>
|
BOOST_PRAGMA_MESSAGE("Using single-threaded, non-atomic sp_counted_base")
|
|
#endif
|
|
namespace boost
|
{
|
|
namespace detail
|
{
|
|
class BOOST_SYMBOL_VISIBLE sp_counted_base
|
{
|
private:
|
|
sp_counted_base( sp_counted_base const & );
|
sp_counted_base & operator= ( sp_counted_base const & );
|
|
boost::int_least32_t use_count_; // #shared
|
boost::int_least32_t weak_count_; // #weak + (#shared != 0)
|
|
public:
|
|
sp_counted_base() BOOST_SP_NOEXCEPT: use_count_( 1 ), weak_count_( 1 )
|
{
|
}
|
|
virtual ~sp_counted_base() /*BOOST_SP_NOEXCEPT*/
|
{
|
}
|
|
// dispose() is called when use_count_ drops to zero, to release
|
// the resources managed by *this.
|
|
virtual void dispose() BOOST_SP_NOEXCEPT = 0; // nothrow
|
|
// destroy() is called when weak_count_ drops to zero.
|
|
virtual void destroy() BOOST_SP_NOEXCEPT // nothrow
|
{
|
delete this;
|
}
|
|
virtual void * get_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT = 0;
|
virtual void * get_local_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT = 0;
|
virtual void * get_untyped_deleter() BOOST_SP_NOEXCEPT = 0;
|
|
void add_ref_copy() BOOST_SP_NOEXCEPT
|
{
|
++use_count_;
|
}
|
|
bool add_ref_lock() BOOST_SP_NOEXCEPT // true on success
|
{
|
if( use_count_ == 0 ) return false;
|
++use_count_;
|
return true;
|
}
|
|
void release() BOOST_SP_NOEXCEPT
|
{
|
if( --use_count_ == 0 )
|
{
|
dispose();
|
weak_release();
|
}
|
}
|
|
void weak_add_ref() BOOST_SP_NOEXCEPT
|
{
|
++weak_count_;
|
}
|
|
void weak_release() BOOST_SP_NOEXCEPT
|
{
|
if( --weak_count_ == 0 )
|
{
|
destroy();
|
}
|
}
|
|
long use_count() const BOOST_SP_NOEXCEPT
|
{
|
return use_count_;
|
}
|
};
|
|
} // namespace detail
|
|
} // namespace boost
|
|
#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_NT_HPP_INCLUDED
|
