diff options
Diffstat (limited to 'src/corelib/tools/qmap.h')
| -rw-r--r-- | src/corelib/tools/qmap.h | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/corelib/tools/qmap.h b/src/corelib/tools/qmap.h index 688aca6..20980e7 100644 --- a/src/corelib/tools/qmap.h +++ b/src/corelib/tools/qmap.h @@ -74,10 +74,13 @@ struct Q_CORE_EXPORT QMapData uint randomBits; uint insertInOrder : 1; uint sharable : 1; + uint strictAlignment : 1; - static QMapData *createData(); + static QMapData *createData(); // ### Qt5 remove me + static QMapData *createData(int alignment); void continueFreeData(int offset); - Node *node_create(Node *update[], int offset); + Node *node_create(Node *update[], int offset); // ### Qt5 remove me + Node *node_create(Node *update[], int offset, int alignment); void node_delete(Node *update[], int offset, Node *node); #ifdef QT_QMAP_DEBUG uint adjust_ptr(Node *node); @@ -145,6 +148,13 @@ class QMap }; static inline int payload() { return sizeof(PayloadNode) - sizeof(QMapData::Node *); } + static inline int alignment() { +#ifdef Q_ALIGNOF + return qMax(sizeof(void*), Q_ALIGNOF(Node)); +#else + return 0; +#endif + } static inline Node *concrete(QMapData::Node *node) { return reinterpret_cast<Node *>(reinterpret_cast<char *>(node) - payload()); } @@ -414,7 +424,7 @@ template <class Key, class T> Q_INLINE_TEMPLATE typename QMapData::Node * QMap<Key, T>::node_create(QMapData *adt, QMapData::Node *aupdate[], const Key &akey, const T &avalue) { - QMapData::Node *abstractNode = adt->node_create(aupdate, payload()); + QMapData::Node *abstractNode = adt->node_create(aupdate, payload(), alignment()); QT_TRY { Node *concreteNode = concrete(abstractNode); new (&concreteNode->key) Key(akey); @@ -715,7 +725,7 @@ template <class Key, class T> Q_OUTOFLINE_TEMPLATE void QMap<Key, T>::detach_helper() { union { QMapData *d; QMapData::Node *e; } x; - x.d = QMapData::createData(); + x.d = QMapData::createData(alignment()); if (d->size) { x.d->insertInOrder = true; QMapData::Node *update[QMapData::LastLevel + 1]; @@ -905,7 +915,7 @@ Q_OUTOFLINE_TEMPLATE bool QMap<Key, T>::operator==(const QMap<Key, T> &other) co template <class Key, class T> Q_OUTOFLINE_TEMPLATE QMap<Key, T>::QMap(const std::map<Key, T> &other) { - d = QMapData::createData(); + d = QMapData::createData(alignment()); d->insertInOrder = true; typename std::map<Key,T>::const_iterator it = other.end(); while (it != other.begin()) { |