void DOMObjectCache::forget(void* objectHandle)
{
DOMObjectCacheData* cacheData = domObjects().get(objectHandle);
ASSERT(cacheData);
g_slice_free(DOMObjectCacheData, cacheData);
domObjects().take(objectHandle);
}
void* DOMObjectCache::put(void* objectHandle, void* wrapper)
{
if (domObjects().get(objectHandle))
return wrapper;
DOMObjectCacheData* data = g_slice_new(DOMObjectCacheData);
data->object = static_cast<GObject*>(wrapper);
data->frame = 0;
data->timesReturned = 1;
domObjects().set(objectHandle, data);
return wrapper;
}
void ScriptInterpreter::mark(bool currentThreadIsMainThread)
{
if (!currentThreadIsMainThread) {
// On alternate threads, DOMObjects remain in the cache because they're not collected.
// So, they need an opportunity to mark their children.
DOMObjectMap::iterator objectEnd = domObjects().end();
for (DOMObjectMap::iterator objectIt = domObjects().begin(); objectIt != objectEnd; ++objectIt) {
DOMObject* object = objectIt->second;
if (!object->marked())
object->mark();
}
}
Interpreter::mark(currentThreadIsMainThread);
}
DOMNode* ScriptInterpreter::getDOMNodeForDocument(Document* document, Node* node)
{
if (!document)
return static_cast<DOMNode*>(domObjects().get(node));
NodeMap* documentDict = domNodesPerDocument().get(document);
if (documentDict)
return documentDict->get(node);
return NULL;
}
void DOMObjectCache::put(WebCore::Node* objectHandle, void* wrapper)
{
DOMObjectMap::AddResult result = domObjects().add(objectHandle, nullptr);
if (!result.isNewEntry)
return;
result.iterator->value = std::make_unique<DOMObjectCacheData>(G_OBJECT(wrapper));
if (WebCore::Frame* frame = objectHandle->document().frame())
getOrCreateDOMObjectCacheFrameObserver(*frame).addObjectCacheData(*result.iterator->value);
}
void ScriptInterpreter::forgetDOMNodeForDocument(Document* document, Node* node)
{
REMOVE_WRAPPER(getDOMNodeForDocument(document, node));
if (!document) {
domObjects().remove(node);
return;
}
NodeMap* documentDict = domNodesPerDocument().get(document);
if (documentDict)
documentDict->remove(node);
}
void* DOMObjectCache::get(void* objectHandle)
{
DOMObjectCacheData* data = domObjects().get(objectHandle);
if (!data)
return 0;
// We want to add one ref each time a wrapper is returned, so that
// the user can manually unref them if he chooses to.
ASSERT(data->object);
data->timesReturned++;
return g_object_ref(data->object);
}
void DOMObjectCache::clearByFrame(WebCore::Frame* frame)
{
Vector<DOMObjectCacheData*> toUnref;
// Unreffing the objects removes them from the cache in their
// finalize method, so just save them to do that while we are not
// iterating the cache itself.
DOMObjectMap::iterator end = domObjects().end();
for (DOMObjectMap::iterator iter = domObjects().begin(); iter != end; ++iter) {
DOMObjectCacheData* data = iter->second;
ASSERT(data);
if ((!frame || data->frame == frame) && data->timesReturned)
toUnref.append(data);
}
Vector<DOMObjectCacheData*>::iterator last = toUnref.end();
for (Vector<DOMObjectCacheData*>::iterator it = toUnref.begin(); it != last; ++it) {
DOMObjectCacheData* data = *it;
// We can't really know what the user has done with the DOM
// objects, so in case any of the external references to them
// were unreffed (but not all, otherwise the object would be
// dead and out of the cache) we'll add a weak ref before we
// start to get rid of the cache's own references; if the
// object dies in the middle of the process, we'll just stop.
gboolean objectDead = FALSE;
g_object_weak_ref(data->object, weakRefNotify, &objectDead);
// We need to check objectDead first, otherwise the cache data
// might be garbage already.
while (!objectDead && data->timesReturned > 0) {
// If this is the last unref we are going to do,
// disconnect the weak ref. We cannot do it afterwards
// because the object might be dead at that point.
if (data->timesReturned == 1)
g_object_weak_unref(data->object, weakRefNotify, &objectDead);
data->timesReturned--;
g_object_unref(data->object);
}
}
}
void* DOMObjectCache::put(WebCore::Node* objectHandle, void* wrapper)
{
// call the ::put version that takes void* to do the basic cache
// insertion work
put(static_cast<void*>(objectHandle), wrapper);
DOMObjectCacheData* data = domObjects().get(objectHandle);
ASSERT(data);
data->frame = getFrameFromHandle(objectHandle);
return wrapper;
}
void ScriptInterpreter::putDOMNodeForDocument(Document* document, Node* node, DOMNode* wrapper)
{
ADD_WRAPPER(wrapper);
if (!document) {
domObjects().set(node, wrapper);
return;
}
NodeMap* documentDict = domNodesPerDocument().get(document);
if (!documentDict) {
documentDict = new NodeMap;
domNodesPerDocument().set(document, documentDict);
}
documentDict->set(node, wrapper);
}
void DOMObjectCache::put(void* objectHandle, void* wrapper)
{
DOMObjectMap::AddResult result = domObjects().add(objectHandle, nullptr);
if (result.isNewEntry)
result.iterator->value = std::make_unique<DOMObjectCacheData>(G_OBJECT(wrapper));
}
void* DOMObjectCache::get(void* objectHandle)
{
DOMObjectCacheData* data = domObjects().get(objectHandle);
return data ? data->refObject() : nullptr;
}
void DOMObjectCache::forget(void* objectHandle)
{
ASSERT(domObjects().contains(objectHandle));
domObjects().remove(objectHandle);
}
void ScriptInterpreter::forgetDOMObject(void* objectHandle)
{
REMOVE_WRAPPER(domObjects().get(objectHandle));
domObjects().remove(objectHandle);
}
void ScriptInterpreter::putDOMObject(void* objectHandle, DOMObject* wrapper)
{
ADD_WRAPPER(wrapper);
domObjects().set(objectHandle, wrapper);
}
DOMObject* ScriptInterpreter::getDOMObject(void* objectHandle)
{
return domObjects().get(objectHandle);
}
