Move QtConcurrent into its own module

Task-number: QTBUG-20892

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

1 files changed, 221 insertions, 0 deletions

diff --git a/src/concurrent/qfuturewatcher.h b/src/concurrent/qfuturewatcher.h
new file mode 100644
index 0000000000..0e94863d12
--- /dev/null
+++ b/src/concurrent/qfuturewatcher.h
@@ -0,0 +1,221 @@
+/****************************************************************************
+**
+** 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 QFUTUREWATCHER_H
+#define QFUTUREWATCHER_H
+
+#include <QtConcurrent/qfuture.h>
+
+#ifndef QT_NO_QFUTURE
+
+#include <QtCore/qobject.h>
+
+QT_BEGIN_HEADER
+QT_BEGIN_NAMESPACE
+
+
+class QEvent;
+
+class QFutureWatcherBasePrivate;
+class Q_CORE_EXPORT QFutureWatcherBase : public QObject
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QFutureWatcherBase)
+
+public:
+    QFutureWatcherBase(QObject *parent = 0);
+
+    int progressValue() const;
+    int progressMinimum() const;
+    int progressMaximum() const;
+    QString progressText() const;
+
+    bool isStarted() const;
+    bool isFinished() const;
+    bool isRunning() const;
+    bool isCanceled() const;
+    bool isPaused() const;
+
+    void waitForFinished();
+
+    void setPendingResultsLimit(int limit);
+
+    bool event(QEvent *event);
+
+Q_SIGNALS:
+    void started();
+    void finished();
+    void canceled();
+    void paused();
+    void resumed();
+    void resultReadyAt(int resultIndex);
+    void resultsReadyAt(int beginIndex, int endIndex);
+    void progressRangeChanged(int minimum, int maximum);
+    void progressValueChanged(int progressValue);
+    void progressTextChanged(const QString &progressText);
+
+public Q_SLOTS:
+    void cancel();
+    void setPaused(bool paused);
+    void pause();
+    void resume();
+    void togglePaused();
+
+protected:
+    void connectNotify (const char * signal);
+    void disconnectNotify (const char * signal);
+
+    // called from setFuture() implemented in template sub-classes
+    void connectOutputInterface();
+    void disconnectOutputInterface(bool pendingAssignment = false);
+
+private:
+    // implemented in the template sub-classes
+    virtual const QFutureInterfaceBase &futureInterface() const = 0;
+    virtual QFutureInterfaceBase &futureInterface() = 0;
+};
+
+template <typename T>
+class QFutureWatcher : public QFutureWatcherBase
+{
+public:
+    QFutureWatcher(QObject *_parent = 0)
+        : QFutureWatcherBase(_parent)
+    { }
+    ~QFutureWatcher()
+    { disconnectOutputInterface(); }
+
+    void setFuture(const QFuture<T> &future);
+    QFuture<T> future() const
+    { return m_future; }
+
+    T result() const { return m_future.result(); }
+    T resultAt(int index) const { return m_future.resultAt(index); }
+
+#ifdef qdoc
+    int progressValue() const;
+    int progressMinimum() const;
+    int progressMaximum() const;
+    QString progressText() const;
+
+    bool isStarted() const;
+    bool isFinished() const;
+    bool isRunning() const;
+    bool isCanceled() const;
+    bool isPaused() const;
+
+    void waitForFinished();
+
+    void setPendingResultsLimit(int limit);
+
+Q_SIGNALS:
+    void started();
+    void finished();
+    void canceled();
+    void paused();
+    void resumed();
+    void resultReadyAt(int resultIndex);
+    void resultsReadyAt(int beginIndex, int endIndex);
+    void progressRangeChanged(int minimum, int maximum);
+    void progressValueChanged(int progressValue);
+    void progressTextChanged(const QString &progressText);
+
+public Q_SLOTS:
+    void cancel();
+    void setPaused(bool paused);
+    void pause();
+    void resume();
+    void togglePaused();
+#endif
+
+private:
+    QFuture<T> m_future;
+    const QFutureInterfaceBase &futureInterface() const { return m_future.d; }
+    QFutureInterfaceBase &futureInterface() { return m_future.d; }
+};
+
+template <typename T>
+Q_INLINE_TEMPLATE void QFutureWatcher<T>::setFuture(const QFuture<T> &_future)
+{
+    if (_future == m_future)
+        return;
+
+    disconnectOutputInterface(true);
+    m_future = _future;
+    connectOutputInterface();
+}
+
+template <>
+class QFutureWatcher<void> : public QFutureWatcherBase
+{
+public:
+    QFutureWatcher(QObject *_parent = 0)
+        : QFutureWatcherBase(_parent)
+    { }
+    ~QFutureWatcher()
+    { disconnectOutputInterface(); }
+
+    void setFuture(const QFuture<void> &future);
+    QFuture<void> future() const
+    { return m_future; }
+
+private:
+    QFuture<void> m_future;
+    const QFutureInterfaceBase &futureInterface() const { return m_future.d; }
+    QFutureInterfaceBase &futureInterface() { return m_future.d; }
+};
+
+Q_INLINE_TEMPLATE void QFutureWatcher<void>::setFuture(const QFuture<void> &_future)
+{
+    if (_future == m_future)
+        return;
+
+    disconnectOutputInterface(true);
+    m_future = _future;
+    connectOutputInterface();
+}
+
+QT_END_NAMESPACE
+QT_END_HEADER
+
+#endif // QT_NO_CONCURRENT
+
+#endif // QFUTUREWATCHER_H