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#include <qtest.h>
#include <QtCore/qmetatype.h>

class tst_QGuiMetaType : public QObject
{
    Q_OBJECT

public:
    tst_QGuiMetaType();
    virtual ~tst_QGuiMetaType();

private slots:
    void constructGuiType_data();
    void constructGuiType();
    void constructGuiTypeCopy_data();
    void constructGuiTypeCopy();

    void constructInPlace_data();
    void constructInPlace();
    void constructInPlaceCopy_data();
    void constructInPlaceCopy();
};

tst_QGuiMetaType::tst_QGuiMetaType()
{
}

tst_QGuiMetaType::~tst_QGuiMetaType()
{
}

void tst_QGuiMetaType::constructGuiType_data()
{
    QTest::addColumn<int>("typeId");
    for (int i = QMetaType::FirstGuiType; i <= QMetaType::LastGuiType; ++i)
        QTest::newRow(QMetaType::typeName(i)) << i;
}

// Tests how fast QMetaType can default-construct and destroy a Qt GUI
// type. The purpose of this benchmark is to measure the overhead of
// using type id-based creation compared to creating the type directly
// (i.e. "T *t = new T(); delete t;").
void tst_QGuiMetaType::constructGuiType()
{
    QFETCH(int, typeId);
    QBENCHMARK {
        for (int i = 0; i < 100000; ++i) {
            void *data = QMetaType::create(typeId, (void *)0);
            QMetaType::destroy(typeId, data);
        }
    }
}

void tst_QGuiMetaType::constructGuiTypeCopy_data()
{
    constructGuiType_data();
}

// Tests how fast QMetaType can copy-construct and destroy a Qt GUI
// type. The purpose of this benchmark is to measure the overhead of
// using type id-based creation compared to creating the type directly
// (i.e. "T *t = new T(other); delete t;").
void tst_QGuiMetaType::constructGuiTypeCopy()
{
    QFETCH(int, typeId);
    QVariant other(typeId, (void *)0);
    const void *copy = other.constData();
    QBENCHMARK {
        for (int i = 0; i < 100000; ++i) {
            void *data = QMetaType::create(typeId, copy);
            QMetaType::destroy(typeId, data);
        }
    }
}

void tst_QGuiMetaType::constructInPlace_data()
{
    constructGuiType_data();
}

void tst_QGuiMetaType::constructInPlace()
{
    QFETCH(int, typeId);
    int size = QMetaType::sizeOf(typeId);
    void *storage = qMallocAligned(size, 2 * sizeof(qlonglong));
    QCOMPARE(QMetaType::construct(typeId, storage, /*copy=*/0), storage);
    QMetaType::destruct(typeId, storage);
    QBENCHMARK {
        for (int i = 0; i < 100000; ++i) {
            QMetaType::construct(typeId, storage, /*copy=*/0);
            QMetaType::destruct(typeId, storage);
        }
    }
    qFreeAligned(storage);
}

void tst_QGuiMetaType::constructInPlaceCopy_data()
{
    constructGuiType_data();
}

void tst_QGuiMetaType::constructInPlaceCopy()
{
    QFETCH(int, typeId);
    int size = QMetaType::sizeOf(typeId);
    void *storage = qMallocAligned(size, 2 * sizeof(qlonglong));
    void *other = QMetaType::create(typeId);
    QCOMPARE(QMetaType::construct(typeId, storage, other), storage);
    QMetaType::destruct(typeId, storage);
    QBENCHMARK {
        for (int i = 0; i < 100000; ++i) {
            QMetaType::construct(typeId, storage, other);
            QMetaType::destruct(typeId, storage);
        }
    }
    QMetaType::destroy(typeId, other);
    qFreeAligned(storage);
}

QTEST_MAIN(tst_QGuiMetaType)
#include "tst_qguimetatype.moc"