adaptor_data.hpp

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//  Copyright (c) 2005-2009 Hartmut Kaiser
//  Copyright (c) 2005 Stephan Hirmer (stephan.hirmer@gmail.com)
// 
//  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)

#ifndef SAGA_SAGA_ADAPTORS_ADAPTOR_DATA_HPP
#define SAGA_SAGA_ADAPTORS_ADAPTOR_DATA_HPP

#include <boost/noncopyable.hpp>

#include <saga/saga/adaptors/config.hpp>
#include <saga/impl/engine/cpi.hpp>

namespace saga { namespace adaptors {
 
    template <typename Adaptor>
    class adaptor_data
    :   public boost::noncopyable
    {
    private:
        typedef saga::impl::v1_0::cpi cpi;

        // this holds the locked data
        TR1::shared_ptr <Adaptor> adaptor_;
        
    public:
        typedef Adaptor adaptor_type;

        template <typename Cpi>
        adaptor_data(Cpi *cpi_instance)
            : adaptor_ (TR1::static_pointer_cast<Adaptor>(
                cpi_instance->get_adaptor())) 
        {
            adaptor_->lock_data();
        }
        
        ~adaptor_data (void)
        {
            if (adaptor_) 
                adaptor_->unlock_data();
        }

        // automatic conversion to the actual adaptor data type is provided
        Adaptor * operator->() const
        {
            return boost::get_pointer(adaptor_);
        }
    };

}} // namespace saga::adaptors

#endif  // SAGA_SAGA_ADAPTORS_ADAPTOR_DATA_HPP