--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/corelib/tools/qscopedpointer.h Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,307 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QSCOPEDPOINTER_H
+#define QSCOPEDPOINTER_H
+
+#include <QtCore/qglobal.h>
+
+QT_BEGIN_HEADER
+QT_BEGIN_NAMESPACE
+QT_MODULE(Core)
+
+template <typename T>
+struct QScopedPointerDeleter
+{
+ static inline void cleanup(T *pointer)
+ {
+ // Enforce a complete type.
+ // If you get a compile error here, read the secion on forward declared
+ // classes in the QScopedPointer documentation.
+ typedef char IsIncompleteType[ sizeof(T) ? 1 : -1 ];
+ (void) sizeof(IsIncompleteType);
+
+ delete pointer;
+ }
+};
+
+template <typename T>
+struct QScopedPointerArrayDeleter
+{
+ static inline void cleanup(T *pointer)
+ {
+ // Enforce a complete type.
+ // If you get a compile error here, read the secion on forward declared
+ // classes in the QScopedPointer documentation.
+ typedef char IsIncompleteType[ sizeof(T) ? 1 : -1 ];
+ (void) sizeof(IsIncompleteType);
+
+ delete [] pointer;
+ }
+};
+
+struct QScopedPointerPodDeleter
+{
+ static inline void cleanup(void *pointer) { if (pointer) qFree(pointer); }
+};
+
+template <typename T, typename Cleanup = QScopedPointerDeleter<T> >
+class QScopedPointer
+{
+#ifndef Q_CC_NOKIAX86
+ typedef T *QScopedPointer:: *RestrictedBool;
+#endif
+public:
+ explicit inline QScopedPointer(T *p = 0) : d(p)
+ {
+ }
+
+ inline ~QScopedPointer()
+ {
+ T *oldD = this->d;
+ Cleanup::cleanup(oldD);
+ this->d = 0;
+ }
+
+ inline T &operator*() const
+ {
+ Q_ASSERT(d);
+ return *d;
+ }
+
+ inline T *operator->() const
+ {
+ Q_ASSERT(d);
+ return d;
+ }
+
+ inline bool operator==(const QScopedPointer<T, Cleanup> &other) const
+ {
+ return d == other.d;
+ }
+
+ inline bool operator!=(const QScopedPointer<T, Cleanup> &other) const
+ {
+ return d != other.d;
+ }
+
+ inline bool operator!() const
+ {
+ return !d;
+ }
+
+#if defined(Q_CC_NOKIAX86) || defined(Q_QDOC)
+ inline operator bool() const
+ {
+ return isNull() ? 0 : &QScopedPointer::d;
+ }
+#else
+ inline operator RestrictedBool() const
+ {
+ return isNull() ? 0 : &QScopedPointer::d;
+ }
+#endif
+
+ inline T *data() const
+ {
+ return d;
+ }
+
+ inline bool isNull() const
+ {
+ return !d;
+ }
+
+ inline void reset(T *other = 0)
+ {
+ if (d == other)
+ return;
+ T *oldD = d;
+ d = other;
+ Cleanup::cleanup(oldD);
+ }
+
+ inline T *take()
+ {
+ T *oldD = d;
+ d = 0;
+ return oldD;
+ }
+
+ inline void swap(QScopedPointer<T, Cleanup> &other)
+ {
+ qSwap(d, other.d);
+ }
+
+ typedef T *pointer;
+
+protected:
+ T *d;
+
+private:
+ Q_DISABLE_COPY(QScopedPointer)
+};
+
+template <class T, class Cleanup>
+Q_INLINE_TEMPLATE void qSwap(QScopedPointer<T, Cleanup> &p1, QScopedPointer<T, Cleanup> &p2)
+{ p1.swap(p2); }
+
+template <typename T, typename Cleanup = QScopedPointerArrayDeleter<T> >
+class QScopedArrayPointer : public QScopedPointer<T, Cleanup>
+{
+public:
+ explicit inline QScopedArrayPointer(T *p = 0)
+ : QScopedPointer<T, Cleanup>(p)
+ {
+ }
+
+ inline T &operator[](int i)
+ {
+ return this->d[i];
+ }
+
+ inline const T &operator[](int i) const
+ {
+ return this->d[i];
+ }
+
+ inline bool operator==(const QScopedArrayPointer<T, Cleanup> &other) const
+ {
+ return this->d == other.d;
+ }
+
+ inline bool operator!=(const QScopedArrayPointer<T, Cleanup> &other) const
+ {
+ return this->d != other.d;
+ }
+
+private:
+ Q_DISABLE_COPY(QScopedArrayPointer)
+};
+
+/* Internal helper class - exposes the data through data_ptr (legacy from QShared).
+ Required for some internal Qt classes, do not use otherwise. */
+template <typename T, typename Cleanup = QScopedPointerDeleter<T> >
+class QCustomScopedPointer : public QScopedPointer<T, Cleanup>
+{
+public:
+ explicit inline QCustomScopedPointer(T *p = 0)
+ : QScopedPointer<T, Cleanup>(p)
+ {
+ }
+
+ inline T *&data_ptr()
+ {
+ return this->d;
+ }
+
+ inline bool operator==(const QCustomScopedPointer<T, Cleanup> &other) const
+ {
+ return this->d == other.d;
+ }
+
+ inline bool operator!=(const QCustomScopedPointer<T, Cleanup> &other) const
+ {
+ return this->d != other.d;
+ }
+
+private:
+ Q_DISABLE_COPY(QCustomScopedPointer)
+};
+
+/* Internal helper class - a handler for QShared* classes, to be used in QCustomScopedPointer */
+template <typename T>
+class QScopedPointerSharedDeleter
+{
+public:
+ static inline void cleanup(T *d)
+ {
+ if (d && !d->ref.deref())
+ delete d;
+ }
+};
+
+/* Internal.
+ This class is basically a scoped pointer pointing to a ref-counted object
+ */
+template <typename T>
+class QScopedSharedPointer : public QCustomScopedPointer<T, QScopedPointerSharedDeleter<T> >
+{
+public:
+ explicit inline QScopedSharedPointer(T *p = 0)
+ : QCustomScopedPointer<T, QScopedPointerSharedDeleter<T> >(p)
+ {
+ }
+
+ inline void detach()
+ {
+ qAtomicDetach(this->d);
+ }
+
+ inline void assign(T *other)
+ {
+ if (this->d == other)
+ return;
+ if (other)
+ other->ref.ref();
+ T *oldD = this->d;
+ this->d = other;
+ QScopedPointerSharedDeleter<T>::cleanup(oldD);
+ }
+
+ inline bool operator==(const QScopedSharedPointer<T> &other) const
+ {
+ return this->d == other.d;
+ }
+
+ inline bool operator!=(const QScopedSharedPointer<T> &other) const
+ {
+ return this->d != other.d;
+ }
+
+private:
+ Q_DISABLE_COPY(QScopedSharedPointer)
+};
+
+QT_END_NAMESPACE
+QT_END_HEADER
+
+#endif // QSCOPEDPOINTER_H