source: source/ariba/utility/transport/asio/unique_io_service.h@ 12774

// [License]

// The Ariba-Underlay Copyright

//

// Copyright (c) 2008-2012, Institute of Telematics, UniversitÀt Karlsruhe (TH)

//

// Institute of Telematics

// UniversitÀt Karlsruhe (TH)

// Zirkel 2, 76128 Karlsruhe

// Germany

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

//

// 1. Redistributions of source code must retain the above copyright

// notice, this list of conditions and the following disclaimer.

// 2. Redistributions in binary form must reproduce the above copyright

// notice, this list of conditions and the following disclaimer in the

// documentation and/or other materials provided with the distribution.

//

// THIS SOFTWARE IS PROVIDED BY THE INSTITUTE OF TELEMATICS ``AS IS'' AND

// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ARIBA PROJECT OR

// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

// The views and conclusions contained in the software and documentation

// are those of the authors and should not be interpreted as representing

// official policies, either expressed or implied, of the Institute of

// Telematics.

// [License]





#ifndef UNIQUE_IO_SERVICE_H_

#define UNIQUE_IO_SERVICE_H_



#include <boost/thread.hpp>

#include <boost/asio.hpp>

#include <boost/noncopyable.hpp>



namespace ariba {

namespace transport {

namespace detail {



/**

 * Multiplexes an asio_io_service so it can be used by multiple components.

 * This class is _not_ threadsafe (use only from ariba thread/system queue)

 *

 * @author Mario Hock <mario@omnifile.org>, Michael TÀnzer <neo@nhng.de>

 */

class unique_io_service : public boost::noncopyable

{

public:

    unique_io_service();

    ~unique_io_service();

    

    /**

     * Returned io_service is only valid during the lifetime of the

     * unique_io_service object. 

     */

    boost::asio::io_service& get_asio_io_service();

    

    /**

     * Executes the io_service::run() method in a parallel thread.

     * Multiple calls don't lead to multiple threads.

     */

    void start();

    

    /**

     * Make the io_service::run() method return and stop thread if this is the

     * last stop() call (number of start() calls == number of stop() calls)

     */

    void stop();



private:

    static void thread_function();

    

    

private:

    static boost::asio::io_service* asio_io_service;

    static int asio_io_service_ref_count;

    

    static boost::thread* thread;

    static int run_count;

    

    static boost::mutex thread_stopped_mutex;

    static boost::condition_variable thread_stopped_cond;

    static bool thread_stopped;

    

    bool running;

};



}}} // namespace ariba::transport::detail



#endif /* UNIQUE_IO_SERVICE_H_ */