inline void StructureTransitionTable::add(JSGlobalData& globalData, Structure* structure)
{
if (isUsingSingleSlot()) {
Structure* existingTransition = singleTransition();
// This handles the first transition being added.
if (!existingTransition) {
setSingleTransition(globalData, structure);
return;
}
// This handles the second transition being added
// (or the first transition being despecified!)
setMap(new TransitionMap());
add(globalData, existingTransition);
}
// Add the structure to the map.
// Newer versions of the STL have an std::make_pair function that takes rvalue references.
// When either of the parameters are bitfields, the C++ compiler will try to bind them as lvalues, which is invalid. To work around this, use unary "+" to make the parameter an rvalue.
// See https://bugs.webkit.org/show_bug.cgi?id=59261 for more details
std::pair<TransitionMap::iterator, bool> result = map()->add(globalData, make_pair(structure->m_nameInPrevious, +structure->m_attributesInPrevious), structure);
if (!result.second) {
// There already is an entry! - we should only hit this when despecifying.
ASSERT(result.first.get().second->m_specificValueInPrevious);
ASSERT(!structure->m_specificValueInPrevious);
map()->set(result.first, structure);
}
}
inline Structure* StructureTransitionTable::get(StringImpl* rep, unsigned attributes) const
{
if (isUsingSingleSlot()) {
Structure* transition = singleTransition();
return (transition && transition->m_nameInPrevious == rep && transition->m_attributesInPrevious == attributes) ? transition : 0;
}
return map()->get(make_pair(rep, attributes));
}
bool StructureTransitionTable::contains(StringImpl* rep, unsigned attributes) const
{
if (isUsingSingleSlot()) {
Structure* transition = singleTransition();
return transition && transition->m_nameInPrevious == rep && transition->m_attributesInPrevious == attributes;
}
return map()->contains(make_pair(rep, attributes));
}
inline void StructureTransitionTable::add(JSGlobalData& globalData, Structure* structure)
{
if (isUsingSingleSlot()) {
Structure* existingTransition = singleTransition();
// This handles the first transition being added.
if (!existingTransition) {
setSingleTransition(globalData, structure);
return;
}
// This handles the second transition being added
// (or the first transition being despecified!)
setMap(new TransitionMap());
add(globalData, existingTransition);
}
// Add the structure to the map.
// Newer versions of the STL have an std::make_pair function that takes rvalue references.
// When either of the parameters are bitfields, the C++ compiler will try to bind them as lvalues, which is invalid. To work around this, use unary "+" to make the parameter an rvalue.
// See https://bugs.webkit.org/show_bug.cgi?id=59261 for more details
map()->set(make_pair(structure->m_nameInPrevious, +structure->m_attributesInPrevious), structure);
}
