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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: futurequeue.hxx,v $
* $Revision: 1.3 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef _SALHELPER_FUTUREQUEUE_HXX_
#define _SALHELPER_FUTUREQUEUE_HXX_
#include <sal/types.h>
#include <rtl/ref.hxx>
#include <osl/mutex.hxx>
#include <salhelper/future.hxx>
#include <salhelper/queue.hxx>
namespace salhelper
{
//----------------------------------------------------------------------------
#ifndef SALHELPER_COPYCTOR_API
#define SALHELPER_COPYCTOR_API(C) C (const C&); C& operator= (const C&)
#endif
//----------------------------------------------------------------------------
template<class element_type>
class FutureQueue : protected osl::Mutex
{
/** Representation.
*/
typedef salhelper::Future<element_type> future_type;
salhelper::QueueBase< rtl::Reference<future_type> > m_aDelayed;
salhelper::QueueBase< rtl::Reference<future_type> > m_aPresent;
/** Not implemented.
*/
SALHELPER_COPYCTOR_API(FutureQueue<element_type>);
public:
/** Construction.
*/
inline FutureQueue()
{}
/** Destruction.
*/
inline ~FutureQueue()
{}
/** Enqueue element at queue tail.
*/
inline void put (const element_type& element)
{
osl::MutexGuard aGuard (*this);
rtl::Reference<future_type> xFuture (m_aDelayed.get());
if (!xFuture.is())
{
xFuture = new future_type();
m_aPresent.put (xFuture);
}
xFuture->set (element);
}
/** Dequeue a future to element at queue head.
*/
inline rtl::Reference< salhelper::Future<element_type> > get()
{
osl::MutexGuard aGuard (*this);
rtl::Reference<future_type> xFuture (m_aPresent.get());
if (!xFuture.is())
{
xFuture = new future_type();
m_aDelayed.put (xFuture);
}
return (xFuture);
}
};
//----------------------------------------------------------------------------
} // namespace salhelper
#endif /* !_SALHELPER_FUTUREQUEUE */
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