diff options
Diffstat (limited to 'src/gui/painting/qpen.cpp')
-rw-r--r-- | src/gui/painting/qpen.cpp | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/src/gui/painting/qpen.cpp b/src/gui/painting/qpen.cpp index c0b3769c2d..b661057f64 100644 --- a/src/gui/painting/qpen.cpp +++ b/src/gui/painting/qpen.cpp @@ -327,17 +327,29 @@ QPen::QPen(const QBrush &brush, qreal width, Qt::PenStyle s, Qt::PenCapStyle c, QPen::QPen(const QPen &p) { d = p.d; - d->ref.ref(); + if (d) + d->ref.ref(); } /*! + \fn QPen::QPen(QPen &&pen) + \since 5.4 + + Constructs a pen that is moved from the given \a pen. + + The moved-from pen can only be assigned to, copied, or + destroyed. Any other operation (prior to assignment) leads to + undefined behavior. +*/ + +/*! Destroys the pen. */ QPen::~QPen() { - if (!d->ref.deref()) + if (d && !d->ref.deref()) delete d; } @@ -373,7 +385,7 @@ void QPen::detach() QPen &QPen::operator=(const QPen &p) { - qAtomicAssign(d, p.d); + QPen(p).swap(*this); return *this; } |