Function shared_count

extern/boost/boost/smart_ptr/detail/shared_count.hpp:141–169

    }

    template<class Y> explicit shared_count( Y * p ): pi_( 0 )
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
        , id_(shared_count_id)
#endif
    {
#ifndef BOOST_NO_EXCEPTIONS

        try
        {
            pi_ = new sp_counted_impl_p<Y>( p );
        }
        catch(...)
        {
            boost::checked_delete( p );
            throw;
        }

#else

        pi_ = new sp_counted_impl_p<Y>( p );

        if( pi_ == 0 )
        {
            boost::checked_delete( p );
            boost::throw_exception( std::bad_alloc() );
        }

#endif
    }

#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1200 )
    template<class Y, class D> shared_count( Y * p, D d ): pi_(0)