Move QtConcurrent into its own module

Task-number: QTBUG-20892

Change-Id: I614500aafb6428915509983608bbb0ade4e4f016
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 0 insertions, 254 deletions

diff --git a/src/corelib/concurrent/qtconcurrentreducekernel.h b/src/corelib/concurrent/qtconcurrentreducekernel.h
deleted file mode 100644
index ddf56298ad..0000000000
--- a/src/corelib/concurrent/qtconcurrentreducekernel.h
+++ /dev/null
@@ -1,254 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/
-**
-** This file is part of the QtCore module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** GNU Lesser General Public License Usage
-** This file may be used under the terms of the GNU Lesser General Public
-** License version 2.1 as published by the Free Software Foundation and
-** appearing in the file LICENSE.LGPL included in the packaging of this
-** file. Please review the following information to ensure the GNU Lesser
-** General Public License version 2.1 requirements will be met:
-** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Nokia gives you certain additional
-** rights. These rights are described in the Nokia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU General
-** Public License version 3.0 as published by the Free Software Foundation
-** and appearing in the file LICENSE.GPL included in the packaging of this
-** file. Please review the following information to ensure the GNU General
-** Public License version 3.0 requirements will be met:
-** http://www.gnu.org/copyleft/gpl.html.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QTCONCURRENT_REDUCEKERNEL_H
-#define QTCONCURRENT_REDUCEKERNEL_H
-
-#include <QtCore/qglobal.h>
-
-#ifndef QT_NO_CONCURRENT
-
-#include <QtCore/qatomic.h>
-#include <QtCore/qlist.h>
-#include <QtCore/qmap.h>
-#include <QtCore/qmutex.h>
-#include <QtCore/qthread.h>
-#include <QtCore/qthreadpool.h>
-#include <QtCore/qvector.h>
-
-QT_BEGIN_HEADER
-QT_BEGIN_NAMESPACE
-
-
-namespace QtConcurrent {
-
-#ifndef qdoc
-
-/*
-    The ReduceQueueStartLimit and ReduceQueueThrottleLimit constants
-    limit the reduce queue size for MapReduce. When the number of
-    reduce blocks in the queue exceeds ReduceQueueStartLimit,
-    MapReduce won't start any new threads, and when it exceeds
-    ReduceQueueThrottleLimit running threads will be stopped.
-*/
-enum {
-    ReduceQueueStartLimit = 20,
-    ReduceQueueThrottleLimit = 30
-};
-
-// IntermediateResults holds a block of intermediate results from a
-// map or filter functor. The begin/end offsets indicates the origin
-// and range of the block.
-template <typename T>
-class IntermediateResults
-{
-public:
-    int begin, end;
-    QVector<T> vector;
-};
-
-#endif // qdoc
-
-enum ReduceOption {
-    UnorderedReduce = 0x1,
-    OrderedReduce = 0x2,
-    SequentialReduce = 0x4
-    // ParallelReduce = 0x8
-};
-Q_DECLARE_FLAGS(ReduceOptions, ReduceOption)
-Q_DECLARE_OPERATORS_FOR_FLAGS(ReduceOptions)
-
-#ifndef qdoc
-
-// supports both ordered and out-of-order reduction
-template <typename ReduceFunctor, typename ReduceResultType, typename T>
-class ReduceKernel
-{
-    typedef QMap<int, IntermediateResults<T> > ResultsMap;
-
-    const ReduceOptions reduceOptions;
-
-    QMutex mutex;
-    int progress, resultsMapSize, threadCount;
-    ResultsMap resultsMap;
-
-    bool canReduce(int begin) const
-    {
-        return (((reduceOptions & UnorderedReduce)
-                 && progress == 0)
-                || ((reduceOptions & OrderedReduce)
-                    && progress == begin));
-    }
-
-    void reduceResult(ReduceFunctor &reduce,
-                      ReduceResultType &r,
-                      const IntermediateResults<T> &result)
-    {
-        for (int i = 0; i < result.vector.size(); ++i) {
-            reduce(r, result.vector.at(i));
-        }
-    }
-
-    void reduceResults(ReduceFunctor &reduce,
-                       ReduceResultType &r,
-                       ResultsMap &map)
-    {
-        typename ResultsMap::iterator it = map.begin();
-        while (it != map.end()) {
-            reduceResult(reduce, r, it.value());
-            ++it;
-        }
-    }
-
-public:
-    ReduceKernel(ReduceOptions _reduceOptions)
-        : reduceOptions(_reduceOptions), progress(0), resultsMapSize(0), 
-          threadCount(QThreadPool::globalInstance()->maxThreadCount())
-    { }
-
-    void runReduce(ReduceFunctor &reduce,
-                   ReduceResultType &r,
-                   const IntermediateResults<T> &result)
-    {
-        QMutexLocker locker(&mutex);
-        if (!canReduce(result.begin)) {
-            ++resultsMapSize;
-            resultsMap.insert(result.begin, result);
-            return;
-        }
-
-        if (reduceOptions & UnorderedReduce) {
-            // UnorderedReduce
-            progress = -1;
-
-            // reduce this result
-            locker.unlock();
-            reduceResult(reduce, r, result);
-            locker.relock();
-
-            // reduce all stored results as well
-            while (!resultsMap.isEmpty()) {
-                ResultsMap resultsMapCopy = resultsMap;
-                resultsMap.clear();
-
-                locker.unlock();
-                reduceResults(reduce, r, resultsMapCopy);
-                locker.relock();
-
-                resultsMapSize -= resultsMapCopy.size();
-            }
-
-            progress = 0;
-        } else {
-            // reduce this result
-            locker.unlock();
-            reduceResult(reduce, r, result);
-            locker.relock();
-
-            // OrderedReduce
-            progress += result.end - result.begin;
-
-            // reduce as many other results as possible
-            typename ResultsMap::iterator it = resultsMap.begin();
-            while (it != resultsMap.end()) {
-                if (it.value().begin != progress)
-                    break;
-
-                locker.unlock();
-                reduceResult(reduce, r, it.value());
-                locker.relock();
-
-                --resultsMapSize;
-                progress += it.value().end - it.value().begin;
-                it = resultsMap.erase(it);
-            }
-        }
-    }
-
-    // final reduction
-    void finish(ReduceFunctor &reduce, ReduceResultType &r)
-    {
-        reduceResults(reduce, r, resultsMap);
-    }
-
-    inline bool shouldThrottle()
-    {
-        return (resultsMapSize > (ReduceQueueThrottleLimit * threadCount));
-    }
-
-    inline bool shouldStartThread()
-    {
-        return (resultsMapSize <= (ReduceQueueStartLimit * threadCount));
-    }
-};
-
-template <typename Sequence, typename Base, typename Functor1, typename Functor2>
-struct SequenceHolder2 : public Base
-{
-    SequenceHolder2(const Sequence &_sequence,
-                    Functor1 functor1,
-                    Functor2 functor2,
-                    ReduceOptions reduceOptions)
-        : Base(_sequence.begin(), _sequence.end(), functor1, functor2, reduceOptions),
-          sequence(_sequence)
-    { }
-
-    Sequence sequence;
-
-    void finish()
-    {
-        Base::finish();
-        // Clear the sequence to make sure all temporaries are destroyed
-        // before finished is signaled.
-        sequence = Sequence();
-    }
-};
-
-#endif //qdoc
-
-} // namespace QtConcurrent
-
-QT_END_NAMESPACE
-QT_END_HEADER
-
-#endif // QT_NO_CONCURRENT
-
-#endif