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baldurk
768e812e45
* On windows it's strongly desired to be able to compile straight out of a clean checkout or source download. This means anyone can download the source and investigate something quickly, without having to worry about the hassle of figuring out how the project downloads 3rd party dependencies, fetching them, getting them registered in the right place. * This can't be put in a submodule as git submodules don't get downloaded by default so people new to git will get confusing compilation messages, and someone downloading the source from github directly without cloning via git won't get submodules included. * It does add some extra size to a fresh download/checkout which is unfortunate, but absolutely worth the cost. Shallow checkouts still aren't unfeasibly large, and it's only a one-off cost at clone time.
268 lines
8.0 KiB
C++
268 lines
8.0 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Copyright (C) 2016 Intel Corporation.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtCore/qglobal.h>
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#ifndef QATOMIC_H
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#define QATOMIC_H
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#include <QtCore/qbasicatomic.h>
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QT_BEGIN_NAMESPACE
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QT_WARNING_PUSH
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QT_WARNING_DISABLE_GCC("-Wextra")
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// High-level atomic integer operations
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template <typename T>
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class QAtomicInteger : public QBasicAtomicInteger<T>
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{
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public:
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// Non-atomic API
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#ifdef QT_BASIC_ATOMIC_HAS_CONSTRUCTORS
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constexpr QAtomicInteger(T value = 0) Q_DECL_NOTHROW : QBasicAtomicInteger<T>(value) {}
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#else
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inline QAtomicInteger(T value = 0) Q_DECL_NOTHROW
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{
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this->_q_value = value;
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}
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#endif
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inline QAtomicInteger(const QAtomicInteger &other) Q_DECL_NOTHROW
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#ifdef QT_BASIC_ATOMIC_HAS_CONSTRUCTORS
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: QBasicAtomicInteger<T>()
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#endif
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{
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this->storeRelease(other.loadAcquire());
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}
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inline QAtomicInteger &operator=(const QAtomicInteger &other) Q_DECL_NOTHROW
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{
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this->storeRelease(other.loadAcquire());
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return *this;
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}
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#ifdef Q_QDOC
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T load() const;
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T loadAcquire() const;
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void store(T newValue);
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void storeRelease(T newValue);
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operator T() const;
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QAtomicInteger &operator=(T);
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static Q_DECL_CONSTEXPR bool isReferenceCountingNative();
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static Q_DECL_CONSTEXPR bool isReferenceCountingWaitFree();
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bool ref();
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bool deref();
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static Q_DECL_CONSTEXPR bool isTestAndSetNative();
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static Q_DECL_CONSTEXPR bool isTestAndSetWaitFree();
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bool testAndSetRelaxed(T expectedValue, T newValue);
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bool testAndSetAcquire(T expectedValue, T newValue);
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bool testAndSetRelease(T expectedValue, T newValue);
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bool testAndSetOrdered(T expectedValue, T newValue);
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static Q_DECL_CONSTEXPR bool isFetchAndStoreNative();
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static Q_DECL_CONSTEXPR bool isFetchAndStoreWaitFree();
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T fetchAndStoreRelaxed(T newValue);
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T fetchAndStoreAcquire(T newValue);
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T fetchAndStoreRelease(T newValue);
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T fetchAndStoreOrdered(T newValue);
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static Q_DECL_CONSTEXPR bool isFetchAndAddNative();
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static Q_DECL_CONSTEXPR bool isFetchAndAddWaitFree();
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T fetchAndAddRelaxed(T valueToAdd);
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T fetchAndAddAcquire(T valueToAdd);
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T fetchAndAddRelease(T valueToAdd);
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T fetchAndAddOrdered(T valueToAdd);
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T fetchAndSubRelaxed(T valueToSub);
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T fetchAndSubAcquire(T valueToSub);
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T fetchAndSubRelease(T valueToSub);
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T fetchAndSubOrdered(T valueToSub);
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T fetchAndOrRelaxed(T valueToOr);
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T fetchAndOrAcquire(T valueToOr);
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T fetchAndOrRelease(T valueToOr);
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T fetchAndOrOrdered(T valueToOr);
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T fetchAndAndRelaxed(T valueToAnd);
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T fetchAndAndAcquire(T valueToAnd);
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T fetchAndAndRelease(T valueToAnd);
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T fetchAndAndOrdered(T valueToAnd);
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T fetchAndXorRelaxed(T valueToXor);
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T fetchAndXorAcquire(T valueToXor);
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T fetchAndXorRelease(T valueToXor);
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T fetchAndXorOrdered(T valueToXor);
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T operator++();
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T operator++(int);
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T operator--();
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T operator--(int);
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T operator+=(T value);
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T operator-=(T value);
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T operator|=(T value);
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T operator&=(T value);
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T operator^=(T value);
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#endif
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};
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class QAtomicInt : public QAtomicInteger<int>
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{
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public:
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// Non-atomic API
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// We could use QT_COMPILER_INHERITING_CONSTRUCTORS, but we need only one;
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// the implicit definition for all the others is fine.
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#ifdef QT_BASIC_ATOMIC_HAS_CONSTRUCTORS
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constexpr
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#endif
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QAtomicInt(int value = 0) Q_DECL_NOTHROW : QAtomicInteger<int>(value) {}
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};
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// High-level atomic pointer operations
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template <typename T>
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class QAtomicPointer : public QBasicAtomicPointer<T>
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{
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public:
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#ifdef QT_BASIC_ATOMIC_HAS_CONSTRUCTORS
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constexpr QAtomicPointer(T *value = 0) Q_DECL_NOTHROW : QBasicAtomicPointer<T>(value) {}
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#else
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inline QAtomicPointer(T *value = 0) Q_DECL_NOTHROW
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{
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this->store(value);
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}
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#endif
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inline QAtomicPointer(const QAtomicPointer<T> &other) Q_DECL_NOTHROW
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#ifdef QT_BASIC_ATOMIC_HAS_CONSTRUCTORS
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: QBasicAtomicPointer<T>()
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#endif
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{
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this->storeRelease(other.loadAcquire());
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}
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inline QAtomicPointer<T> &operator=(const QAtomicPointer<T> &other) Q_DECL_NOTHROW
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{
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this->storeRelease(other.loadAcquire());
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return *this;
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}
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#ifdef Q_QDOC
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T *load() const;
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T *loadAcquire() const;
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void store(T *newValue);
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void storeRelease(T *newValue);
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static Q_DECL_CONSTEXPR bool isTestAndSetNative();
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static Q_DECL_CONSTEXPR bool isTestAndSetWaitFree();
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bool testAndSetRelaxed(T *expectedValue, T *newValue);
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bool testAndSetAcquire(T *expectedValue, T *newValue);
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bool testAndSetRelease(T *expectedValue, T *newValue);
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bool testAndSetOrdered(T *expectedValue, T *newValue);
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static Q_DECL_CONSTEXPR bool isFetchAndStoreNative();
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static Q_DECL_CONSTEXPR bool isFetchAndStoreWaitFree();
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T *fetchAndStoreRelaxed(T *newValue);
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T *fetchAndStoreAcquire(T *newValue);
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T *fetchAndStoreRelease(T *newValue);
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T *fetchAndStoreOrdered(T *newValue);
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static Q_DECL_CONSTEXPR bool isFetchAndAddNative();
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static Q_DECL_CONSTEXPR bool isFetchAndAddWaitFree();
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T *fetchAndAddRelaxed(qptrdiff valueToAdd);
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T *fetchAndAddAcquire(qptrdiff valueToAdd);
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T *fetchAndAddRelease(qptrdiff valueToAdd);
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T *fetchAndAddOrdered(qptrdiff valueToAdd);
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#endif
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};
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QT_WARNING_POP
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#ifdef QT_BASIC_ATOMIC_HAS_CONSTRUCTORS
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# undef QT_BASIC_ATOMIC_HAS_CONSTRUCTORS
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#endif
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/*!
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This is a helper for the assignment operators of implicitly
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shared classes. Your assignment operator should look like this:
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\snippet code/src.corelib.thread.qatomic.h 0
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*/
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template <typename T>
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inline void qAtomicAssign(T *&d, T *x)
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{
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if (d == x)
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return;
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x->ref.ref();
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if (!d->ref.deref())
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delete d;
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d = x;
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}
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/*!
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This is a helper for the detach method of implicitly shared
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classes. Your private class needs a copy constructor which copies
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the members and sets the refcount to 1. After that, your detach
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function should look like this:
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\snippet code/src.corelib.thread.qatomic.h 1
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*/
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template <typename T>
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inline void qAtomicDetach(T *&d)
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{
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if (d->ref.load() == 1)
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return;
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T *x = d;
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d = new T(*d);
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if (!x->ref.deref())
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delete x;
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}
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QT_END_NAMESPACE
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#endif // QATOMIC_H
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