diff options
Diffstat (limited to 'src/corelib/tools/qsharedpointer.cpp')
| -rw-r--r-- | src/corelib/tools/qsharedpointer.cpp | 188 |
1 files changed, 123 insertions, 65 deletions
diff --git a/src/corelib/tools/qsharedpointer.cpp b/src/corelib/tools/qsharedpointer.cpp index bd4d6c906b..217a3a4ff4 100644 --- a/src/corelib/tools/qsharedpointer.cpp +++ b/src/corelib/tools/qsharedpointer.cpp @@ -1,43 +1,7 @@ -/**************************************************************************** -** -** Copyright (C) 2020 The Qt Company Ltd. -** Copyright (C) 2020 Intel Corporation. -** Copyright (C) 2019 Klarälvdalens Datakonsult AB. -** Contact: https://www.qt.io/licensing/ -** -** 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 The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/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 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2020 The Qt Company Ltd. +// Copyright (C) 2020 Intel Corporation. +// Copyright (C) 2019 Klarälvdalens Datakonsult AB. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only #include "qsharedpointer.h" @@ -175,8 +139,7 @@ can also exceptionally be -1, indicating that there are no QSharedPointers attached to an object, which is tracked too. The only case where this is possible is that of QWeakPointers and QPointers tracking a QObject. Note - that QWeakPointers tracking a QObject is a deprecated feature as of Qt 5.0, - kept only for compatibility with Qt 4.x. + that QWeakPointers tracking a QObject is deprecated. The weak reference count controls the lifetime of the d-pointer itself. It can be thought of as an internal/intrusive reference count for @@ -211,7 +174,7 @@ last QSharedPointer instance had. This class is never instantiated directly: the constructors and - destructor are private and, in C++11, deleted. Only the create() function + destructor are deleted. Only the create() function may be called to return an object of this type. See below for construction details. @@ -250,8 +213,7 @@ Like ExternalRefCountWithCustomDeleter, this class is never instantiated directly. This class also provides a create() member that returns the - pointer, and hides its constructors and destructor. With C++11, they're - deleted. + pointer, and deletes its constructors and destructor. The size of this class depends on the size of \tt T. @@ -479,6 +441,46 @@ */ /*! + \fn template <class T> QSharedPointer<T>::QSharedPointer(QSharedPointer &&other) + + Move-constructs a QSharedPointer instance, making it point at the same + object that \a other was pointing to. + + \since 5.4 +*/ + +/*! + \fn template <class T> QSharedPointer<T>::operator=(QSharedPointer &&other) + + Move-assigns \a other to this QSharedPointer instance. + + \since 5.0 +*/ + +/*! + \fn template <class T> template <class X> QSharedPointer<T>::QSharedPointer(QSharedPointer<X> &&other) + + Move-constructs a QSharedPointer instance, making it point at the same + object that \a other was pointing to. + + This constructor participates in overload resolution only if \c{X*} + implicitly converts to \c{T*}. + + \since 5.6 +*/ + +/*! + \fn template <class T> template <class X> QSharedPointer<T>::operator=(QSharedPointer<X> &&other) + + Move-assigns \a other to this QSharedPointer instance. + + This assignment operator participates in overload resolution only if \c{X*} + implicitly converts to \c{T*}. + + \since 5.6 +*/ + +/*! \fn template <class T> QSharedPointer<T>::QSharedPointer(const QWeakPointer<T> &other) Creates a QSharedPointer by promoting the weak reference \a other @@ -707,6 +709,49 @@ */ /*! + \fn template <class T> template <class X> bool QSharedPointer<T>::owner_before(const QSharedPointer<X> &other) const noexcept + \fn template <class T> template <class X> bool QSharedPointer<T>::owner_before(const QWeakPointer<X> &other) const noexcept + \fn template <class T> template <class X> bool QWeakPointer<T>::owner_before(const QSharedPointer<X> &other) const noexcept + \fn template <class T> template <class X> bool QWeakPointer<T>::owner_before(const QWeakPointer<X> &other) const noexcept + \since 6.7 + + Returns \c true if and only if this smart pointer precedes \a other + in an implementation-defined owner-based ordering. The ordering is such + that two smart pointers are considered equivalent if they are both + empty or if they both own the same object (even if their apparent type + and pointer are different). + + \sa owner_equal +*/ + +/*! + \fn template <class T> template <class X> bool QSharedPointer<T>::owner_equal(const QSharedPointer<X> &other) const noexcept + \fn template <class T> template <class X> bool QSharedPointer<T>::owner_equal(const QWeakPointer<X> &other) const noexcept + \fn template <class T> template <class X> bool QWeakPointer<T>::owner_equal(const QSharedPointer<X> &other) const noexcept + \fn template <class T> template <class X> bool QWeakPointer<T>::owner_equal(const QWeakPointer<X> &other) const noexcept + + \since 6.7 + + Returns \c true if and only if this smart pointer and \a other + share ownership. + + \sa owner_before, owner_hash +*/ + +/*! + \fn template <class T> size_t QSharedPointer<T>::owner_hash() const noexcept + \fn template <class T> size_t QWeakPointer<T>::owner_hash() const noexcept + + \since 6.7 + + Returns a owner-based hash value for this smart pointer object. + Smart pointers that compare equal (as per \c{owner_equal}) will + have an identical owner-based hash. + + \sa owner_equal +*/ + +/*! \fn template <class T> QWeakPointer<T>::QWeakPointer() Creates a QWeakPointer that points to nothing. @@ -932,7 +977,16 @@ */ /*! - \fn template <class T> template <class X> bool operator==(const QSharedPointer<T> &ptr1, const QSharedPointer<X> &ptr2) + \fn template <class T> qHash(const QSharedPointer<T> &key, size_t seed) + \relates QSharedPointer + + Returns the hash value for \a key, using \a seed to seed the calculation. + + \since 5.0 +*/ + +/*! + \fn template<class T, class X> bool operator==(const QSharedPointer<T> &ptr1, const QSharedPointer<X> &ptr2) \relates QSharedPointer Returns \c true if \a ptr1 and \a ptr2 refer to the same pointer. @@ -945,7 +999,7 @@ */ /*! - \fn template <class T> template <class X> bool operator!=(const QSharedPointer<T> &ptr1, const QSharedPointer<X> &ptr2) + \fn template<class T, class X> bool operator!=(const QSharedPointer<T> &ptr1, const QSharedPointer<X> &ptr2) \relates QSharedPointer Returns \c true if \a ptr1 and \a ptr2 refer to distinct pointers. @@ -958,7 +1012,7 @@ */ /*! - \fn template <class T> template <class X> bool operator==(const QSharedPointer<T> &ptr1, const X *ptr2) + \fn template<class T, class X> bool operator==(const QSharedPointer<T> &ptr1, const X *ptr2) \relates QSharedPointer Returns \c true if \a ptr1 and \a ptr2 refer to the same pointer. @@ -971,7 +1025,7 @@ */ /*! - \fn template <class T> template <class X> bool operator!=(const QSharedPointer<T> &ptr1, const X *ptr2) + \fn template<class T, class X> bool operator!=(const QSharedPointer<T> &ptr1, const X *ptr2) \relates QSharedPointer Returns \c true if \a ptr1 and \a ptr2 refer to distinct pointers. @@ -984,7 +1038,7 @@ */ /*! - \fn template <class T> template <class X> bool operator==(const T *ptr1, const QSharedPointer<X> &ptr2) + \fn template<class T, class X> bool operator==(const T *ptr1, const QSharedPointer<X> &ptr2) \relates QSharedPointer Returns \c true if the pointer \a ptr1 is the @@ -998,7 +1052,7 @@ */ /*! - \fn template <class T> template <class X> bool operator!=(const T *ptr1, const QSharedPointer<X> &ptr2) + \fn template<class T, class X> bool operator!=(const T *ptr1, const QSharedPointer<X> &ptr2) \relates QSharedPointer Returns \c true if the pointer \a ptr1 is not the @@ -1012,7 +1066,7 @@ */ /*! - \fn template <class T> template <class X> bool operator==(const QSharedPointer<T> &ptr1, const QWeakPointer<X> &ptr2) + \fn template<class T, class X> bool operator==(const QSharedPointer<T> &ptr1, const QWeakPointer<X> &ptr2) \relates QWeakPointer Returns \c true if \a ptr1 and \a ptr2 refer to the same pointer. @@ -1025,7 +1079,7 @@ */ /*! - \fn template <class T> template <class X> bool operator!=(const QSharedPointer<T> &ptr1, const QWeakPointer<X> &ptr2) + \fn template<class T, class X> bool operator!=(const QSharedPointer<T> &ptr1, const QWeakPointer<X> &ptr2) \relates QWeakPointer Returns \c true if \a ptr1 and \a ptr2 refer to distinct pointers. @@ -1038,7 +1092,7 @@ */ /*! - \fn template <class T> template <class X> bool operator==(const QWeakPointer<T> &ptr1, const QSharedPointer<X> &ptr2) + \fn template<class T, class X> bool operator==(const QWeakPointer<T> &ptr1, const QSharedPointer<X> &ptr2) \relates QWeakPointer Returns \c true if \a ptr1 and \a ptr2 refer to the same pointer. @@ -1131,7 +1185,7 @@ */ /*! - \fn template <class T> template <class X> bool operator!=(const QWeakPointer<T> &ptr1, const QSharedPointer<X> &ptr2) + \fn template<class T, class X> bool operator!=(const QWeakPointer<T> &ptr1, const QSharedPointer<X> &ptr2) \relates QWeakPointer Returns \c true if \a ptr1 and \a ptr2 refer to distinct pointers. @@ -1144,7 +1198,7 @@ */ /*! - \fn template <class X> template <class T> QSharedPointer<X> qSharedPointerCast(const QSharedPointer<T> &other) + \fn template <class X, class T> QSharedPointer<X> qSharedPointerCast(const QSharedPointer<T> &other) \relates QSharedPointer Returns a shared pointer to the pointer held by \a other, cast to @@ -1159,7 +1213,7 @@ */ /*! - \fn template <class X> template <class T> QSharedPointer<X> qSharedPointerCast(const QWeakPointer<T> &other) + \fn template <class X, class T> QSharedPointer<X> qSharedPointerCast(const QWeakPointer<T> &other) \relates QSharedPointer \relates QWeakPointer @@ -1180,7 +1234,7 @@ */ /*! - \fn template <class X> template <class T> QSharedPointer<X> qSharedPointerDynamicCast(const QSharedPointer<T> &src) + \fn template <class X, class T> QSharedPointer<X> qSharedPointerDynamicCast(const QSharedPointer<T> &src) \relates QSharedPointer Returns a shared pointer to the pointer held by \a src, using a @@ -1196,7 +1250,7 @@ */ /*! - \fn template <class X> template <class T> QSharedPointer<X> qSharedPointerDynamicCast(const QWeakPointer<T> &src) + \fn template <class X, class T> QSharedPointer<X> qSharedPointerDynamicCast(const QWeakPointer<T> &src) \relates QSharedPointer \relates QWeakPointer @@ -1218,7 +1272,7 @@ */ /*! - \fn template <class X> template <class T> QSharedPointer<X> qSharedPointerConstCast(const QSharedPointer<T> &src) + \fn template <class X, class T> QSharedPointer<X> qSharedPointerConstCast(const QSharedPointer<T> &src) \relates QSharedPointer Returns a shared pointer to the pointer held by \a src, cast to @@ -1230,7 +1284,7 @@ */ /*! - \fn template <class X> template <class T> QSharedPointer<X> qSharedPointerConstCast(const QWeakPointer<T> &src) + \fn template <class X, class T> QSharedPointer<X> qSharedPointerConstCast(const QWeakPointer<T> &src) \relates QSharedPointer \relates QWeakPointer @@ -1248,7 +1302,7 @@ */ /*! - \fn template <class X> template <class T> QSharedPointer<X> qSharedPointerObjectCast(const QSharedPointer<T> &src) + \fn template <class X, class T> QSharedPointer<X> qSharedPointerObjectCast(const QSharedPointer<T> &src) \relates QSharedPointer \since 4.6 @@ -1320,7 +1374,7 @@ */ /*! - \fn template <class X> template <class T> QSharedPointer<X> qSharedPointerObjectCast(const QWeakPointer<T> &src) + \fn template <class X, class T> QSharedPointer<X> qSharedPointerObjectCast(const QWeakPointer<T> &src) \relates QSharedPointer \relates QWeakPointer \since 4.6 @@ -1346,7 +1400,7 @@ /*! - \fn template <class X> template <class T> QWeakPointer<X> qWeakPointerCast(const QWeakPointer<T> &src) + \fn template <class X, class T> QWeakPointer<X> qWeakPointerCast(const QWeakPointer<T> &src) \relates QWeakPointer Returns a weak pointer to the pointer held by \a src, cast to @@ -1366,6 +1420,7 @@ QT_BEGIN_NAMESPACE +QT6_ONLY( /*! \internal This function is called for a just-created QObject \a obj, to enable @@ -1373,7 +1428,9 @@ QT_BEGIN_NAMESPACE */ void QtSharedPointer::ExternalRefCountData::setQObjectShared(const QObject *, bool) {} +) +QT6_ONLY( /*! \internal This function is called when a QSharedPointer is created from a QWeakPointer @@ -1386,6 +1443,7 @@ void QtSharedPointer::ExternalRefCountData::checkQObjectShared(const QObject *) if (strongref.loadRelaxed() < 0) qWarning("QSharedPointer: cannot create a QSharedPointer from a QObject-tracking QWeakPointer"); } +) QtSharedPointer::ExternalRefCountData *QtSharedPointer::ExternalRefCountData::getAndRef(const QObject *obj) { @@ -1450,7 +1508,7 @@ QT_END_NAMESPACE # ifdef QT_SHARED_POINTER_BACKTRACE_SUPPORT # if defined(__GLIBC__) && (__GLIBC__ >= 2) && !defined(__UCLIBC__) && !defined(QT_LINUXBASE) # define BACKTRACE_SUPPORTED -# elif defined(Q_OS_MAC) +# elif defined(Q_OS_DARWIN) # define BACKTRACE_SUPPORTED # endif # endif |