src/corelib/thread/qatomic.h File Reference

#include <QtCore/qatomic_arch.h>
#include <QtCore/qglobal.h>

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Classes
struct	QBasicAtomic
struct	QBasicAtomicPointer< T >
class	QAtomic
class	QAtomicPointer< T >
Defines
#define	Q_ATOMIC_INIT(a)   { (a) }
Functions
template<typename T>
T	qAtomicSetPtr (volatile T *ptr, T newval)
template<typename T>
void	qAtomicAssign (T *&d, T *x)
template<typename T>
void	qAtomicAssign (QBasicAtomicPointer< T > &d, T *x)
template<typename T>
void	qAtomicAssign (QBasicAtomicPointer< T > &d, const QBasicAtomicPointer< T > &x)
template<typename T>
void	qAtomicDetach (T *&d)
template<typename T>
void	qAtomicDetach (QBasicAtomicPointer< T > &d)

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Define Documentation

#define Q_ATOMIC_INIT

(

a

)

{ (a) }

Definition at line 143 of file qatomic.h.

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Function Documentation

template<typename T>

void qAtomicAssign	(	QBasicAtomicPointer< T > &	d,
		const QBasicAtomicPointer< T > &	x
	)			[inline]

Definition at line 230 of file qatomic.h.

References d, and x.

{ qAtomicAssign<T>(d, x); }

template<typename T>

void qAtomicAssign	(	QBasicAtomicPointer< T > &	d,
		T *	x
	)			[inline]

Definition at line 218 of file qatomic.h.

References d.

{
    x->ref.ref();
    x = d.exchange(x);
    if (!x->ref.deref())
        delete x;
}

template<typename T>

void qAtomicAssign	(	T *&	d,
		T *	x
	)			[inline]

This is a helper for the assignment operators of implicitly shared classes. Your assignment operator should look like this:

        MyClass &MyClass:operator=(const MyClass &other)
        { qAtomicAssign(d, other.d); return *this; }

Definition at line 206 of file qatomic.h.

References qAtomicSetPtr().

Referenced by QColormap::operator=(), QDateTime::operator=(), QFileInfo::operator=(), QPen::operator=(), QCursor::operator=(), QUrl::operator=(), QDBusMessage::operator=(), QSqlDatabase::operator=(), QFontMetricsF::operator=(), QKeySequence::operator=(), QFontMetrics::operator=(), QSqlQuery::operator=(), QSqlField::operator=(), QFontInfo::operator=(), QFont::operator=(), QDir::operator=(), and QSqlRecord::operator=().

{
    x->ref.ref();
    x = qAtomicSetPtr(&d, x);
    if (!x->ref.deref())
        delete x;
}

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template<typename T>

void qAtomicDetach

(

QBasicAtomicPointer< T > &

d

)

[inline]

Definition at line 258 of file qatomic.h.

References d, T, and x.

{
    if (d->ref == 1)
        return;
    T *x = new T(*d);
    x = d.exchange(x);
    if (!x->ref.deref())
        delete x;
}

template<typename T>

void qAtomicDetach

(

T *&

d

)

[inline]

Definition at line 244 of file qatomic.h.

References qAtomicSetPtr(), T, and x.

Referenced by QFileInfoPrivate::detach(), QDirPrivate::detach(), QDateTime::detach(), QSqlRecord::detach(), QSqlField::detach(), QFont::detach(), QUrl::detach(), operator>>(), and QKeySequence::setKey().

{
    if (d->ref == 1)
        return;
    T *x = new T(*d);
    x = qAtomicSetPtr(&d, x);
    if (!x->ref.deref())
        delete x;
}

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template<typename T>

T qAtomicSetPtr	(	volatile T *	ptr,
		T	newval
	)			[inline]

Definition at line 148 of file qatomic.h.

References q_atomic_set_ptr().

Referenced by QVariant::detach(), QListData::detach(), QPalette::detach(), QPen::detach(), QBrush::detach(), QMap< Key, T >::detach_helper(), QLinkedList< T >::detach_helper(), QPainterPath::detach_helper(), QPicture::detach_helper(), QGLColormap::detach_helper(), QHash< Key, T >::detach_helper(), QSharedDataPointer< T >::detach_helper(), QPainterPath::ensureData_helper(), QDBusArgument::operator=(), QExplicitlySharedDataPointer< TranslationUnitData >::operator=(), QPainterPath::operator=(), QDomNamedNodeMap::operator=(), QTextDocumentFragment::operator=(), QList< T >::operator=(), QLinkedList< T >::operator=(), QPalette::operator=(), QIcon::operator=(), QBrush::operator=(), QByteArray::operator=(), QMap< Key, T >::operator=(), QX11Info::operator=(), QSharedDataPointer< QStyleSheetPaletteData >::operator=(), QString::operator=(), QVector< T >::operator=(), QHash< Key, T >::operator=(), QGLColormap::operator=(), QDomImplementation::operator=(), QDomNodeList::operator=(), QDomNode::operator=(), QImage::operator=(), qAtomicAssign(), qAtomicDetach(), QString::realloc(), QByteArray::realloc(), QVector< T >::realloc(), QByteArray::resize(), QString::resize(), QCursor::setShape(), and QList< T >::~QList().

{ return static_cast<T>(q_atomic_set_ptr(ptr, newval)); }

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