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-rw-r--r--src/corelib/tools/qsharedpointer_impl.h129
1 files changed, 71 insertions, 58 deletions
diff --git a/src/corelib/tools/qsharedpointer_impl.h b/src/corelib/tools/qsharedpointer_impl.h
index 0471a1b..739a949 100644
--- a/src/corelib/tools/qsharedpointer_impl.h
+++ b/src/corelib/tools/qsharedpointer_impl.h
@@ -49,6 +49,7 @@
#endif
#include <QtCore/qatomic.h>
+#include <QtCore/qobject.h> // for qobject_cast
QT_BEGIN_HEADER
@@ -83,13 +84,17 @@ QSharedPointer<X> qSharedPointerDynamicCast(const QSharedPointer<T> &ptr);
template <class X, class T>
QSharedPointer<X> qSharedPointerConstCast(const QSharedPointer<T> &ptr);
+#ifndef QT_NO_QOBJECT
+template <class X, class T>
+QSharedPointer<X> qSharedPointerObjectCast(const QSharedPointer<T> &ptr);
+#endif
+
namespace QtSharedPointer {
template <class T> class InternalRefCount;
template <class T> class ExternalRefCount;
- template <class X, class T> QSharedPointer<X> qStrongRefFromWeakHelper(const QWeakPointer<T> &, X*);
- template <class X, class T> QSharedPointer<X> qSharedPointerCastHelper(const QSharedPointer<T> &src, X *);
- template <class X, class T> QSharedPointer<X> qSharedPointerConstCastHelper(const QSharedPointer<T> &src, X *);
+ template <class X, class T> QSharedPointer<X> strongRefFromWeakHelper(const QWeakPointer<T> &, X*);
+ template <class X, class Y> QSharedPointer<X> copyAndSetPointer(X * ptr, const QSharedPointer<Y> &src);
// used in debug mode to verify the reuse of pointers
Q_CORE_EXPORT void internalSafetyCheckAdd(const volatile void *);
@@ -123,7 +128,7 @@ namespace QtSharedPointer {
inline T *operator->() const { return data(); }
protected:
- inline Basic() : value(0 * sizeof(T)) { }
+ inline Basic() : value(0) { }
// ~Basic();
inline void verifyReconstruction(const T *ptr)
@@ -239,10 +244,8 @@ namespace QtSharedPointer {
#else
template <class X> friend class ExternalRefCount;
template <class X> friend class QWeakPointer;
- template <class X, class Y> friend QSharedPointer<X> qSharedPointerCastHelper(const QSharedPointer<Y> &src, X *);
- template <class X, class Y> friend QSharedPointer<X> qSharedPointerDynamicCastHelper(const QSharedPointer<Y> &src, X *);
- template <class X, class Y> friend QSharedPointer<X> qSharedPointerConstCastHelper(const QSharedPointer<Y> &src, X *);
- template <class X, class Y> friend QSharedPointer<X> QtSharedPointer::qStrongRefFromWeakHelper(const QWeakPointer<Y> &src, X *);
+ template <class X, class Y> friend QSharedPointer<X> copyAndSetPointer(X * ptr, const QSharedPointer<Y> &src);
+ template <class X, class Y> friend QSharedPointer<X> QtSharedPointer::strongRefFromWeakHelper(const QWeakPointer<Y> &src, X *);
#endif
inline void internalSet(Data *o, T *actual)
@@ -292,9 +295,9 @@ public:
}
inline QSharedPointer(const QWeakPointer<T> &other)
- { *this = QtSharedPointer::qStrongRefFromWeakHelper(other, static_cast<T*>(0)); }
+ { *this = QtSharedPointer::strongRefFromWeakHelper(other, static_cast<T*>(0)); }
inline QSharedPointer<T> &operator=(const QWeakPointer<T> &other)
- { *this = QtSharedPointer::qStrongRefFromWeakHelper(other, static_cast<T*>(0)); return *this; }
+ { *this = QtSharedPointer::strongRefFromWeakHelper(other, static_cast<T*>(0)); return *this; }
template <class X>
inline QSharedPointer(const QSharedPointer<X> &other) { *this = other; }
@@ -309,11 +312,11 @@ public:
template <class X>
inline QSharedPointer(const QWeakPointer<X> &other)
- { *this = QtSharedPointer::qStrongRefFromWeakHelper(other, static_cast<T *>(0)); }
+ { *this = QtSharedPointer::strongRefFromWeakHelper(other, static_cast<T *>(0)); }
template <class X>
inline QSharedPointer<T> &operator=(const QWeakPointer<X> &other)
- { *this = qStrongRefFromWeakHelper(other, static_cast<T *>(0)); return *this; }
+ { *this = strongRefFromWeakHelper(other, static_cast<T *>(0)); return *this; }
template <class X>
QSharedPointer<X> staticCast() const
@@ -333,6 +336,14 @@ public:
return qSharedPointerConstCast<X, T>(*this);
}
+#ifndef QT_NO_QOBJECT
+ template <class X>
+ QSharedPointer<X> objectCast() const
+ {
+ return qSharedPointerObjectCast<X, T>(*this);
+ }
+#endif
+
inline void clear() { *this = QSharedPointer<T>(); }
QWeakPointer<T> toWeakRef() const;
@@ -417,7 +428,7 @@ private:
#if defined(Q_NO_TEMPLATE_FRIENDS)
public:
#else
- template <class X, class Y> friend QSharedPointer<X> QtSharedPointer::qStrongRefFromWeakHelper(const QWeakPointer<Y> &src, X *);
+ template <class X, class Y> friend QSharedPointer<X> QtSharedPointer::strongRefFromWeakHelper(const QWeakPointer<Y> &src, X *);
#endif
inline void internalSet(Data *o, T *actual)
@@ -488,47 +499,14 @@ Q_INLINE_TEMPLATE QWeakPointer<T> QSharedPointer<T>::toWeakRef() const
namespace QtSharedPointer {
// helper functions:
template <class X, class T>
- Q_INLINE_TEMPLATE X *qVerifyStaticCast(T *src, X *)
- {
- return static_cast<X *>(src); // if you get an error in this line, the cast is invalid
- }
- template <class X, class T>
- Q_INLINE_TEMPLATE X *qVerifyDynamicCast(T *src, X *)
- {
- return dynamic_cast<X *>(src); // if you get an error in this line, the cast is invalid
- }
- template <class X, class T>
- Q_INLINE_TEMPLATE X *qVerifyConstCast(T *src, X *)
- {
- return const_cast<X *>(src); // if you get an error in this line, the cast is invalid
- }
-
- template <class X, class T>
- Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerCastHelper(const QSharedPointer<T> &src, X *)
+ Q_INLINE_TEMPLATE QSharedPointer<X> copyAndSetPointer(X *ptr, const QSharedPointer<T> &src)
{
QSharedPointer<X> result;
- register T *ptr = src.data();
- result.internalSet(src.d, static_cast<X *>(ptr));
+ result.internalSet(src.d, ptr);
return result;
}
template <class X, class T>
- Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerDynamicCastHelper(const QSharedPointer<T> &src, X *)
- {
- QSharedPointer<X> result;
- register T *ptr = src.data();
- result.internalSet(src.d, dynamic_cast<X *>(ptr));
- return result;
- }
- template <class X, class T>
- Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerConstCastHelper(const QSharedPointer<T> &src, X *)
- {
- QSharedPointer<X> result;
- register T *ptr = src.data();
- result.internalSet(src.d, const_cast<X *>(ptr));
- return result;
- }
- template <class X, class T>
- Q_INLINE_TEMPLATE QSharedPointer<X> qStrongRefFromWeakHelper
+ Q_INLINE_TEMPLATE QSharedPointer<X> strongRefFromWeakHelper
(const QT_PREPEND_NAMESPACE(QWeakPointer<T>) &src, X *)
{
QSharedPointer<X> result;
@@ -541,9 +519,8 @@ namespace QtSharedPointer {
template <class X, class T>
Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerCast(const QSharedPointer<T> &src)
{
- X *x = 0;
- QtSharedPointer::qVerifyStaticCast(src.data(), x);
- return QtSharedPointer::qSharedPointerCastHelper(src, x);
+ register X *ptr = static_cast<X *>(src.data()); // if you get an error in this line, the cast is invalid
+ return QtSharedPointer::copyAndSetPointer(ptr, src);
}
template <class X, class T>
Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerCast(const QWeakPointer<T> &src)
@@ -554,8 +531,8 @@ Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerCast(const QWeakPointer<T> &sr
template <class X, class T>
Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerDynamicCast(const QSharedPointer<T> &src)
{
- X *x = 0;
- return QtSharedPointer::qSharedPointerDynamicCastHelper(src, x);
+ register X *ptr = dynamic_cast<X *>(src.data()); // if you get an error in this line, the cast is invalid
+ return QtSharedPointer::copyAndSetPointer(ptr, src);
}
template <class X, class T>
Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerDynamicCast(const QWeakPointer<T> &src)
@@ -566,14 +543,13 @@ Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerDynamicCast(const QWeakPointer
template <class X, class T>
Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerConstCast(const QSharedPointer<T> &src)
{
- X *x = 0;
- return QtSharedPointer::qSharedPointerConstCastHelper(src, x);
+ register X *ptr = const_cast<X *>(src.data()); // if you get an error in this line, the cast is invalid
+ return QtSharedPointer::copyAndSetPointer(ptr, src);
}
template <class X, class T>
Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerConstCast(const QWeakPointer<T> &src)
{
- X *x = 0;
- return QtSharedPointer::qSharedPointerConstCastHelper(src, x);
+ return qSharedPointerConstCast<X, T>(src.toStrongRef());
}
template <class X, class T>
@@ -583,6 +559,43 @@ QWeakPointer<X> qWeakPointerCast(const QSharedPointer<T> &src)
return qSharedPointerCast<X, T>(src).toWeakRef();
}
+#ifndef QT_NO_QOBJECT
+template <class X, class T>
+Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerObjectCast(const QSharedPointer<T> &src)
+{
+ register X *ptr = qobject_cast<X *>(src.data());
+ return QtSharedPointer::copyAndSetPointer(ptr, src);
+}
+template <class X, class T>
+Q_INLINE_TEMPLATE QSharedPointer<X> qSharedPointerObjectCast(const QWeakPointer<T> &src)
+{
+ return qSharedPointerObjectCast<X>(src.toStrongRef());
+}
+
+# ifndef QT_NO_PARTIAL_TEMPLATE_SPECIALIZATION
+namespace QtSharedPointer {
+ template <class T> struct RemovePointer;
+ template <class T> struct RemovePointer<T *> { typedef T Type; };
+ template <class T> struct RemovePointer<QSharedPointer<T> > { typedef T Type; };
+ template <class T> struct RemovePointer<QWeakPointer<T> > { typedef T Type; };
+}
+
+template <class X, class T>
+inline QSharedPointer<typename QtSharedPointer::RemovePointer<X>::Type>
+qobject_cast(const QSharedPointer<T> &src)
+{
+ return qSharedPointerObjectCast<typename QtSharedPointer::RemovePointer<X>::Type, T>(src);
+}
+template <class X, class T>
+inline QSharedPointer<typename QtSharedPointer::RemovePointer<X>::Type>
+qobject_cast(const QWeakPointer<T> &src)
+{
+ return qSharedPointerObjectCast<typename QtSharedPointer::RemovePointer<X>::Type, T>(src);
+}
+# endif
+
+#endif
+
QT_END_NAMESPACE
QT_END_HEADER
generated by cgit v0.12 at 2025-09-16 23:28:20 (GMT)