Template class salhelper::FutureQueue<T>.

1 files changed, 154 insertions, 0 deletions

diff --git a/salhelper/inc/salhelper/futurequeue.hxx b/salhelper/inc/salhelper/futurequeue.hxx
new file mode 100644
index 000000000000..97b97878cd60
--- /dev/null
+++ b/salhelper/inc/salhelper/futurequeue.hxx
@@ -0,0 +1,154 @@
+/*************************************************************************
+ *
+ *  $RCSfile: futurequeue.hxx,v $
+ *
+ *  $Revision: 1.1 $
+ *
+ *  last change: $Author: mhu $ $Date: 2001-05-14 11:53:07 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library 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 for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (the "License"); You may not use this file
+ *  except in compliance with the License. You may obtain a copy of the
+ *  License at http://www.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+#ifndef _SALHELPER_FUTUREQUEUE_HXX_
+#define _SALHELPER_FUTUREQUEUE_HXX_
+
+#ifndef _SAL_TYPES_H_
+#include <sal/types.h>
+#endif
+
+#ifndef _RTL_REF_HXX_
+#include <rtl/ref.hxx>
+#endif
+#ifndef _OSL_MUTEX_HXX_
+#include <osl/mutex.hxx>
+#endif
+
+#ifndef _SALHELPER_FUTURE_HXX_
+#include <salhelper/future.hxx>
+#endif
+#ifndef _SALHELPER_QUEUE_HXX_
+#include <salhelper/queue.hxx>
+#endif
+
+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 */