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Add QAppleRefCounted template as the base of QCFType

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This helps to reduce code duplication as it will be used as the basis
of other reference-counted RAII template classes in the future.

Change-Id: I6e7e32373ec738f68d960afc759213610232b9bf
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Jake Petroules 2016-06-21 11:44:54 -07:00
parent d436e0e6f5
commit 384f6ca96a
1 changed files with 25 additions and 19 deletions
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44
src/corelib/kernel/qcore_mac_p.h
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@ -76,6 +76,28 @@
#endif
QT_BEGIN_NAMESPACE
template <typename T, typename U, U (*RetainFunction)(U), void (*ReleaseFunction)(U)>
class QAppleRefCounted
{
public:
QAppleRefCounted(const T &t = T()) : type(t) {}
QAppleRefCounted(const QAppleRefCounted &helper) : type(helper.type) { if (type) RetainFunction(type); }
~QAppleRefCounted() { if (type) ReleaseFunction(type); }
operator T() { return type; }
QAppleRefCounted &operator=(const QAppleRefCounted &helper)
{
if (helper.type)
RetainFunction(helper.type);
T type2 = type;
type = helper.type;
if (type2)
ReleaseFunction(type2);
return *this;
}
T *operator&() { return &type; }
protected:
T type;
};
/*
Helper class that automates refernce counting for CFtypes.
@ -90,32 +112,16 @@ QT_BEGIN_NAMESPACE
HIThemeGet*Shape functions, which in reality are "Copy" functions.
*/
template <typename T>
class Q_CORE_EXPORT QCFType
class QCFType : public QAppleRefCounted<T, CFTypeRef, CFRetain, CFRelease>
{
public:
inline QCFType(const T &t = 0) : type(t) {}
inline QCFType(const QCFType &helper) : type(helper.type) { if (type) CFRetain(type); }
inline ~QCFType() { if (type) CFRelease(type); }
inline operator T() { return type; }
inline QCFType operator =(const QCFType &helper)
{
if (helper.type)
CFRetain(helper.type);
CFTypeRef type2 = type;
type = helper.type;
if (type2)
CFRelease(type2);
return *this;
}
inline T *operator&() { return &type; }
template <typename X> X as() const { return reinterpret_cast<X>(type); }
using QAppleRefCounted<T, CFTypeRef, CFRetain, CFRelease>::QAppleRefCounted;
template <typename X> X as() const { return reinterpret_cast<X>(this->type); }
static QCFType constructFromGet(const T &t)
{
CFRetain(t);
return QCFType<T>(t);
}
protected:
T type;
};
class Q_CORE_EXPORT QCFString : public QCFType<CFStringRef>