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-/****************************************************************************
-**
-** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of the QtCore module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and Digia. For licensing terms and
-** conditions see http://qt.digia.com/licensing. For further information
-** use the contact form at http://qt.digia.com/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, 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, Digia gives you certain additional
-** rights. These rights are described in the Digia 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.
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QFUTUREINTERFACE_H
-#define QFUTUREINTERFACE_H
-
-#include <QtConcurrent/qtconcurrent_global.h>
-
-#include <QtCore/qrunnable.h>
-
-#ifndef QT_NO_QFUTURE
-
-#include <QtCore/qmutex.h>
-#include <QtCore/qexception.h>
-#include <QtCore/qresultstore.h>
-
-QT_BEGIN_HEADER
-QT_BEGIN_NAMESPACE
-
-
-template <typename T> class QFuture;
-class QFutureInterfaceBasePrivate;
-class QFutureWatcherBase;
-class QFutureWatcherBasePrivate;
-
-class Q_CONCURRENT_EXPORT QFutureInterfaceBase
-{
-public:
- enum State {
- NoState = 0x00,
- Running = 0x01,
- Started = 0x02,
- Finished = 0x04,
- Canceled = 0x08,
- Paused = 0x10,
- Throttled = 0x20
- };
-
- QFutureInterfaceBase(State initialState = NoState);
- QFutureInterfaceBase(const QFutureInterfaceBase &other);
- virtual ~QFutureInterfaceBase();
-
- // reporting functions available to the engine author:
- void reportStarted();
- void reportFinished();
- void reportCanceled();
-#ifndef QT_NO_EXCEPTIONS
- void reportException(const QException &e);
-#endif
- void reportResultsReady(int beginIndex, int endIndex);
-
- void setRunnable(QRunnable *runnable);
- void setFilterMode(bool enable);
- void setProgressRange(int minimum, int maximum);
- int progressMinimum() const;
- int progressMaximum() const;
- bool isProgressUpdateNeeded() const;
- void setProgressValue(int progressValue);
- int progressValue() const;
- void setProgressValueAndText(int progressValue, const QString &progressText);
- QString progressText() const;
-
- void setExpectedResultCount(int resultCount);
- int expectedResultCount();
- int resultCount() const;
-
- bool queryState(State state) const;
- bool isRunning() const;
- bool isStarted() const;
- bool isCanceled() const;
- bool isFinished() const;
- bool isPaused() const;
- bool isThrottled() const;
- bool isResultReadyAt(int index) const;
-
- void cancel();
- void setPaused(bool paused);
- void togglePaused();
- void setThrottled(bool enable);
-
- void waitForFinished();
- bool waitForNextResult();
- void waitForResult(int resultIndex);
- void waitForResume();
-
- QMutex *mutex() const;
- QtPrivate::ExceptionStore &exceptionStore();
- QtPrivate::ResultStoreBase &resultStoreBase();
- const QtPrivate::ResultStoreBase &resultStoreBase() const;
-
- inline bool operator==(const QFutureInterfaceBase &other) const { return d == other.d; }
- inline bool operator!=(const QFutureInterfaceBase &other) const { return d != other.d; }
- QFutureInterfaceBase &operator=(const QFutureInterfaceBase &other);
-
-protected:
- bool referenceCountIsOne() const;
-public:
-
-#ifndef QFUTURE_TEST
-private:
-#endif
- QFutureInterfaceBasePrivate *d;
-
-private:
- friend class QFutureWatcherBase;
- friend class QFutureWatcherBasePrivate;
-};
-
-template <typename T>
-class QFutureInterface : public QFutureInterfaceBase
-{
-public:
- QFutureInterface(State initialState = NoState)
- : QFutureInterfaceBase(initialState)
- { }
- QFutureInterface(const QFutureInterface &other)
- : QFutureInterfaceBase(other)
- { }
- ~QFutureInterface()
- {
- if (referenceCountIsOne())
- resultStore().clear();
- }
-
- static QFutureInterface canceledResult()
- { return QFutureInterface(State(Started | Finished | Canceled)); }
-
- QFutureInterface &operator=(const QFutureInterface &other)
- {
- if (referenceCountIsOne())
- resultStore().clear();
- QFutureInterfaceBase::operator=(other);
- return *this;
- }
-
- inline QFuture<T> future(); // implemented in qfuture.h
-
- inline void reportResult(const T *result, int index = -1);
- inline void reportResult(const T &result, int index = -1);
- inline void reportResults(const QVector<T> &results, int beginIndex = -1, int count = -1);
- inline void reportFinished(const T *result = 0);
-
- inline const T &resultReference(int index) const;
- inline const T *resultPointer(int index) const;
- inline QList<T> results();
-private:
- QtPrivate::ResultStore<T> &resultStore()
- { return static_cast<QtPrivate::ResultStore<T> &>(resultStoreBase()); }
- const QtPrivate::ResultStore<T> &resultStore() const
- { return static_cast<const QtPrivate::ResultStore<T> &>(resultStoreBase()); }
-};
-
-template <typename T>
-inline void QFutureInterface<T>::reportResult(const T *result, int index)
-{
- QMutexLocker locker(mutex());
- if (this->queryState(Canceled) || this->queryState(Finished)) {
- return;
- }
-
- QtPrivate::ResultStore<T> &store = resultStore();
-
-
- if (store.filterMode()) {
- const int resultCountBefore = store.count();
- store.addResult(index, result);
- this->reportResultsReady(resultCountBefore, resultCountBefore + store.count());
- } else {
- const int insertIndex = store.addResult(index, result);
- this->reportResultsReady(insertIndex, insertIndex + 1);
- }
-}
-
-template <typename T>
-inline void QFutureInterface<T>::reportResult(const T &result, int index)
-{
- reportResult(&result, index);
-}
-
-template <typename T>
-inline void QFutureInterface<T>::reportResults(const QVector<T> &_results, int beginIndex, int count)
-{
- QMutexLocker locker(mutex());
- if (this->queryState(Canceled) || this->queryState(Finished)) {
- return;
- }
-
- QtPrivate::ResultStore<T> &store = resultStore();
-
- if (store.filterMode()) {
- const int resultCountBefore = store.count();
- store.addResults(beginIndex, &_results, count);
- this->reportResultsReady(resultCountBefore, store.count());
- } else {
- const int insertIndex = store.addResults(beginIndex, &_results, count);
- this->reportResultsReady(insertIndex, insertIndex + _results.count());
- }
-}
-
-template <typename T>
-inline void QFutureInterface<T>::reportFinished(const T *result)
-{
- if (result)
- reportResult(result);
- QFutureInterfaceBase::reportFinished();
-}
-
-template <typename T>
-inline const T &QFutureInterface<T>::resultReference(int index) const
-{
- QMutexLocker lock(mutex());
- return resultStore().resultAt(index).value();
-}
-
-template <typename T>
-inline const T *QFutureInterface<T>::resultPointer(int index) const
-{
- QMutexLocker lock(mutex());
- return resultStore().resultAt(index).pointer();
-}
-
-template <typename T>
-inline QList<T> QFutureInterface<T>::results()
-{
- if (this->isCanceled()) {
- exceptionStore().throwPossibleException();
- return QList<T>();
- }
- QFutureInterfaceBase::waitForResult(-1);
-
- QList<T> res;
- QMutexLocker lock(mutex());
-
- QtPrivate::ResultIterator<T> it = resultStore().begin();
- while (it != resultStore().end()) {
- res.append(it.value());
- ++it;
- }
-
- return res;
-}
-
-template <>
-class QFutureInterface<void> : public QFutureInterfaceBase
-{
-public:
- QFutureInterface<void>(State initialState = NoState)
- : QFutureInterfaceBase(initialState)
- { }
- QFutureInterface<void>(const QFutureInterface<void> &other)
- : QFutureInterfaceBase(other)
- { }
-
- static QFutureInterface<void> canceledResult()
- { return QFutureInterface(State(Started | Finished | Canceled)); }
-
- QFutureInterface<void> &operator=(const QFutureInterface<void> &other)
- {
- QFutureInterfaceBase::operator=(other);
- return *this;
- }
-
- inline QFuture<void> future(); // implemented in qfuture.h
-
- void reportResult(const void *, int) { }
- void reportResults(const QVector<void> &, int) { }
- void reportFinished(const void * = 0) { QFutureInterfaceBase::reportFinished(); }
-};
-
-QT_END_NAMESPACE
-QT_END_HEADER
-
-#endif // QT_NO_CONCURRENT
-
-#endif // QFUTUREINTERFACE_H
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