qmetatype.h File Reference

#include <QtCore/qglobal.h>
#include <QtCore/qatomic.h>
#include <QtCore/qdatastream.h>

Go to the source code of this file.

Classes
class	QMetaType
struct	QMetaTypeId< T >
struct	QMetaTypeId2< T >
struct	QMetaTypeIdHelper< T, Defined >
struct	QMetaTypeIdHelper< T, false >
Namespaces
namespace	QtPrivate
Defines
#define	Q_DECLARE_METATYPE(TYPE)
#define	Q_DECLARE_BUILTIN_METATYPE(TYPE, NAME)
Functions
template<typename T >
void	qMetaTypeDeleteHelper (T *t)
template<typename T >
void *	qMetaTypeConstructHelper (const T *t)
template<typename T >
void	qMetaTypeSaveHelper (QDataStream &stream, const T *t)
template<typename T >
void	qMetaTypeLoadHelper (QDataStream &stream, T *t)
template<typename T >
int	qRegisterMetaType (const char *typeName, T *dummy=0)
template<typename T >
void	qRegisterMetaTypeStreamOperators (const char *typeName, T *=0)
template<typename T >
int	qMetaTypeId (T *=0)
template<typename T >
int	qRegisterMetaType (T *dummy=0)
template<typename T >
int	qRegisterMetaTypeStreamOperators ()

---

Define Documentation

#define Q_DECLARE_METATYPE

(

TYPE

)

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Value:

QT_BEGIN_NAMESPACE                                                  \
    template <>                                                         \
    struct QMetaTypeId< TYPE >                                          \
    {                                                                   \
        enum { Defined = 1 };                                           \
        static int qt_metatype_id()                                     \
            {                                                           \
                static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0); \
                if (!metatype_id)                                       \
                    metatype_id = qRegisterMetaType< TYPE >(#TYPE,      \
                               reinterpret_cast< TYPE *>(quintptr(-1))); \
                return metatype_id;                                     \
            }                                                           \
    };                                                                  \
    QT_END_NAMESPACE

Definition at line 265 of file qmetatype.h.

#define Q_DECLARE_BUILTIN_METATYPE	(		TYPE,
			NAME
	)

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Value:

QT_BEGIN_NAMESPACE \
    template<> struct QMetaTypeId2<TYPE> \
    { \
        enum { Defined = 1, MetaType = QMetaType::NAME }; \
        static inline int qt_metatype_id() { return QMetaType::NAME; } \
    }; \
    QT_END_NAMESPACE

Definition at line 282 of file qmetatype.h.

---

Function Documentation

void qMetaTypeDeleteHelper

(

T *

t

)

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Definition at line 132 of file qmetatype.h.

{
    delete t;
}

void* qMetaTypeConstructHelper

(

const T *

t

)

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Definition at line 138 of file qmetatype.h.

{
    if (!t)
        return new T;
    return new T(*static_cast<const T*>(t));
}

void qMetaTypeSaveHelper	(	QDataStream &	stream,
		const T *	t
	)

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Definition at line 147 of file qmetatype.h.

{
    stream << *t;
}

void qMetaTypeLoadHelper	(	QDataStream &	stream,
		T *	t
	)

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Definition at line 153 of file qmetatype.h.

{
    stream >> *t;
}

int qRegisterMetaType	(	const char *	typeName,
		T *	dummy = 0
	)

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Definition at line 185 of file qmetatype.h.

{
    const int typedefOf = dummy ? -1 : QtPrivate::QMetaTypeIdHelper<T>::qt_metatype_id();
    if (typedefOf != -1)
        return QMetaType::registerTypedef(typeName, typedefOf);

    typedef void*(*ConstructPtr)(const T*);
    ConstructPtr cptr = qMetaTypeConstructHelper<T>;
    typedef void(*DeletePtr)(T*);
    DeletePtr dptr = qMetaTypeDeleteHelper<T>;

    return QMetaType::registerType(typeName, reinterpret_cast<QMetaType::Destructor>(dptr),
                                   reinterpret_cast<QMetaType::Constructor>(cptr));
}

void qRegisterMetaTypeStreamOperators	(	const char *	typeName,
		T *	= 0
	)

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Definition at line 206 of file qmetatype.h.

{
    typedef void(*SavePtr)(QDataStream &, const T *);
    typedef void(*LoadPtr)(QDataStream &, T *);
    SavePtr sptr = qMetaTypeSaveHelper<T>;
    LoadPtr lptr = qMetaTypeLoadHelper<T>;

    qRegisterMetaType<T>(typeName);
    QMetaType::registerStreamOperators(typeName, reinterpret_cast<QMetaType::SaveOperator>(sptr),
                                       reinterpret_cast<QMetaType::LoadOperator>(lptr));
}

int qMetaTypeId

(

T *

= 0

)

[inline]

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Definition at line 224 of file qmetatype.h.

{
    return QMetaTypeId2<T>::qt_metatype_id();
}

int qRegisterMetaType

(

T *

dummy = 0

)

[inline]

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Definition at line 234 of file qmetatype.h.

{
#ifdef Q_CC_SUN
    return qMetaTypeId(static_cast<T *>(0));
#else
    return qMetaTypeId(dummy);
#endif
}

int qRegisterMetaTypeStreamOperators

(

)

[inline]

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Definition at line 249 of file qmetatype.h.

{
    typedef void(*SavePtr)(QDataStream &, const T *);
    typedef void(*LoadPtr)(QDataStream &, T *);
    SavePtr sptr = qMetaTypeSaveHelper<T>;
    LoadPtr lptr = qMetaTypeLoadHelper<T>;

    register int id = qMetaTypeId<T>();
    QMetaType::registerStreamOperators(id,
                                       reinterpret_cast<QMetaType::SaveOperator>(sptr),
                                       reinterpret_cast<QMetaType::LoadOperator>(lptr));

    return id;
}