C++ (Cpp) SlotVisitor::addWeakReferenceHarvesterの例

コード例 #1

void WeakMapData::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
    Base::visitChildren(cell, visitor);
    WeakMapData* thisObj = jsCast<WeakMapData*>(cell);
    visitor.addUnconditionalFinalizer(&thisObj->m_deadKeyCleaner);
    visitor.addWeakReferenceHarvester(&thisObj->m_deadKeyCleaner);

    // Rough approximation of the external storage needed for the hashtable.
    // This isn't exact, but it is close enough, and proportional to the actual
    // external mermory usage.
    visitor.reportExtraMemoryUsage(thisObj->m_map.capacity() * (sizeof(JSObject*) + sizeof(WriteBarrier<Unknown>)));
}