From bef4438eea6fc44ef81c63772e10d2390586d16c Mon Sep 17 00:00:00 2001 From: Michael Brasser Date: Wed, 22 Apr 2009 15:43:08 +1000 Subject: Fix merge error. --- src/corelib/kernel/qvariant_p.h | 34 ++++++++++++++++++++++++++++++---- 1 file changed, 30 insertions(+), 4 deletions(-) diff --git a/src/corelib/kernel/qvariant_p.h b/src/corelib/kernel/qvariant_p.h index 727a390..074575b 100644 --- a/src/corelib/kernel/qvariant_p.h +++ b/src/corelib/kernel/qvariant_p.h @@ -91,13 +91,36 @@ inline T *v_cast(QVariant::Private *d, T * = 0) #endif + +//a simple template that avoids to allocate 2 memory chunks when creating a QVariant +template class QVariantPrivateSharedEx : public QVariant::PrivateShared +{ +public: + QVariantPrivateSharedEx() : QVariant::PrivateShared(&m_t) { } + QVariantPrivateSharedEx(const T&t) : QVariant::PrivateShared(&m_t), m_t(t) { } + +private: + T m_t; +}; + // constructs a new variant if copy is 0, otherwise copy-constructs template +inline void v_construct(QVariant::Private *x, const T &t) +{ + if (sizeof(T) > sizeof(QVariant::Private::Data)) { + x->data.shared = new QVariantPrivateSharedEx(t); + x->is_shared = true; + } else { + new (&x->data.ptr) T(t); + } +} + +template inline void v_construct(QVariant::Private *x, const void *copy, T * = 0) { if (sizeof(T) > sizeof(QVariant::Private::Data)) { - x->data.shared = copy ? new QVariant::PrivateShared(new T(*static_cast(copy))) - : new QVariant::PrivateShared(new T); + x->data.shared = copy ? new QVariantPrivateSharedEx(*static_cast(copy)) + : new QVariantPrivateSharedEx; x->is_shared = true; } else { if (copy) @@ -111,12 +134,15 @@ inline void v_construct(QVariant::Private *x, const void *copy, T * = 0) template inline void v_clear(QVariant::Private *d, T* = 0) { + if (sizeof(T) > sizeof(QVariant::Private::Data)) { - delete v_cast(d); - delete d->data.shared; + //now we need to cast + //because QVariant::PrivateShared doesn't have a virtual destructor + delete static_cast*>(d->data.shared); } else { v_cast(d)->~T(); } + } QT_END_NAMESPACE -- cgit v0.12