Oilpan: move mutation observers to the Oilpan heap.

Source/core/dom/MutationObserver.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 31 matching lines @@
 #include "core/dom/MutationRecord.h"
 #include "core/dom/Node.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "wtf/MainThread.h"
 
 namespace WebCore {
 
 static unsigned s_observerPriority = 0;
 
 struct MutationObserver::ObserverLessThan {
-    bool operator()(const RefPtr<MutationObserver>& lhs, const RefPtr<MutationObserver>& rhs)
+    bool operator()(const RefPtrWillBeMember<MutationObserver>& lhs, const RefPtrWillBeMember<MutationObserver>& rhs)
     {
         return lhs->m_priority < rhs->m_priority;
     }
 };
 
-PassRefPtr<MutationObserver> MutationObserver::create(PassOwnPtr<MutationCallback> callback)
+PassRefPtrWillBeRawPtr<MutationObserver> MutationObserver::create(PassOwnPtr<MutationCallback> callback)
 {
     ASSERT(isMainThread());
-    return adoptRef(new MutationObserver(callback));
+    return adoptRefWillBeNoop(new MutationObserver(callback));
 }
 
 MutationObserver::MutationObserver(PassOwnPtr<MutationCallback> callback)
     : m_callback(callback)
     , m_priority(s_observerPriority++)
 {
     ScriptWrappable::init(this);
 }
 
 MutationObserver::~MutationObserver()
@@ skipping 61 matching lines @@
     }
 
     if (!(options & (Attributes | CharacterData | ChildList))) {
         exceptionState.throwTypeError("The options object must set at least one of 'attributes', 'characterData', or 'childList' to true.");
         return;
     }
 
     node->registerMutationObserver(*this, options, attributeFilter);
 }
 
-Vector<RefPtr<MutationRecord> > MutationObserver::takeRecords()
+WillBeHeapVector<RefPtrWillBeMember<MutationRecord> > MutationObserver::takeRecords()
 {
-    Vector<RefPtr<MutationRecord> > records;
+    WillBeHeapVector<RefPtrWillBeMember<MutationRecord> > records;
     records.swap(m_records);
     InspectorInstrumentation::didClearAllMutationRecords(m_callback->executionContext(), this);
     return records;
 }
 
 void MutationObserver::disconnect()
 {
     m_records.clear();
     InspectorInstrumentation::didClearAllMutationRecords(m_callback->executionContext(), this);
-    HashSet<MutationObserverRegistration*> registrations(m_registrations);
-    for (HashSet<MutationObserverRegistration*>::iterator iter = registrations.begin(); iter != registrations.end(); ++iter)
+    WillBeHeapHashSet<RawPtrWillBeMember<MutationObserverRegistration> > registrations(m_registrations);
+    for (WillBeHeapHashSet<RawPtrWillBeMember<MutationObserverRegistration> >::iterator iter = registrations.begin(); iter != registrations.end(); ++iter)
         (*iter)->unregister();
+    ASSERT(m_registrations.isEmpty());
 }
 
 void MutationObserver::observationStarted(MutationObserverRegistration* registration)
 {
     ASSERT(!m_registrations.contains(registration));
     m_registrations.add(registration);
 }
 
 void MutationObserver::observationEnded(MutationObserverRegistration* registration)
 {
     ASSERT(m_registrations.contains(registration));
     m_registrations.remove(registration);
 }
 
-typedef HashSet<RefPtr<MutationObserver> > MutationObserverSet;
+typedef WillBeHeapHashSet<RefPtrWillBeMember<MutationObserver> > MutationObserverSet;
 
 static MutationObserverSet& activeMutationObservers()
 {
+#if ENABLE(OILPAN)
+    DEFINE_STATIC_LOCAL(Persistent<MutationObserverSet>, activeObservers, (new MutationObserverSet()));
+    return *activeObservers;
+#else
     DEFINE_STATIC_LOCAL(MutationObserverSet, activeObservers, ());
     return activeObservers;
+#endif
 }
 
 static MutationObserverSet& suspendedMutationObservers()
 {
+#if ENABLE(OILPAN)
+    DEFINE_STATIC_LOCAL(Persistent<MutationObserverSet>, suspendedObservers, (new MutationObserverSet()));
+    return *suspendedObservers;
+#else
     DEFINE_STATIC_LOCAL(MutationObserverSet, suspendedObservers, ());
     return suspendedObservers;
+#endif
 }
 
-static void activateObserver(PassRefPtr<MutationObserver> observer)
+static void activateObserver(PassRefPtrWillBeRawPtr<MutationObserver> observer)
 {
     if (activeMutationObservers().isEmpty())
         Microtask::enqueueMicrotask(WTF::bind(&MutationObserver::deliverMutations));
 
     activeMutationObservers().add(observer);
 }
 
-void MutationObserver::enqueueMutationRecord(PassRefPtr<MutationRecord> mutation)
+void MutationObserver::enqueueMutationRecord(PassRefPtrWillBeRawPtr<MutationRecord> mutation)
 {
     ASSERT(isMainThread());
     m_records.append(mutation);
     activateObserver(this);
     InspectorInstrumentation::didEnqueueMutationRecord(m_callback->executionContext(), this);
 }
 
 void MutationObserver::setHasTransientRegistration()
 {
     ASSERT(isMainThread());
     activateObserver(this);
 }
 
 HashSet<Node*> MutationObserver::getObservedNodes() const
 {
     HashSet<Node*> observedNodes;
-    for (HashSet<MutationObserverRegistration*>::const_iterator iter = m_registrations.begin(); iter != m_registrations.end(); ++iter)
+    for (WillBeHeapHashSet<RawPtrWillBeMember<MutationObserverRegistration> >::const_iterator iter = m_registrations.begin(); iter != m_registrations.end(); ++iter)
         (*iter)->addRegistrationNodesToSet(observedNodes);
     return observedNodes;
 }
 
 bool MutationObserver::canDeliver()
 {
     return !m_callback->executionContext()->activeDOMObjectsAreSuspended();
 }
 
 void MutationObserver::deliver()
 {
     ASSERT(canDeliver());
 
     // Calling clearTransientRegistrations() can modify m_registrations, so it's necessary
     // to make a copy of the transient registrations before operating on them.
-    Vector<MutationObserverRegistration*, 1> transientRegistrations;
-    for (HashSet<MutationObserverRegistration*>::iterator iter = m_registrations.begin(); iter != m_registrations.end(); ++iter) {
+    WillBeHeapVector<RawPtrWillBeMember<MutationObserverRegistration>, 1> transientRegistrations;
+    for (WillBeHeapHashSet<RawPtrWillBeMember<MutationObserverRegistration> >::iterator iter = m_registrations.begin(); iter != m_registrations.end(); ++iter) {
         if ((*iter)->hasTransientRegistrations())
             transientRegistrations.append(*iter);
     }
     for (size_t i = 0; i < transientRegistrations.size(); ++i)
         transientRegistrations[i]->clearTransientRegistrations();
 
     if (m_records.isEmpty())
         return;
 
-    Vector<RefPtr<MutationRecord> > records;
+    WillBeHeapVector<RefPtrWillBeMember<MutationRecord> > records;
     records.swap(m_records);
 
     InspectorInstrumentation::willDeliverMutationRecords(m_callback->executionContext(), this);
     m_callback->call(records, this);
     InspectorInstrumentation::didDeliverMutationRecords(m_callback->executionContext());
 }
 
 void MutationObserver::resumeSuspendedObservers()
 {
     ASSERT(isMainThread());
     if (suspendedMutationObservers().isEmpty())
         return;
 
-    Vector<RefPtr<MutationObserver> > suspended;
+    WillBeHeapVector<RefPtrWillBeMember<MutationObserver> > suspended;
     copyToVector(suspendedMutationObservers(), suspended);
     for (size_t i = 0; i < suspended.size(); ++i) {
         if (suspended[i]->canDeliver()) {
             suspendedMutationObservers().remove(suspended[i]);
             activateObserver(suspended[i]);
         }
     }
 }
 
 void MutationObserver::deliverMutations()
 {
     ASSERT(isMainThread());
-    Vector<RefPtr<MutationObserver> > observers;
+    WillBeHeapVector<RefPtrWillBeMember<MutationObserver> > observers;
     copyToVector(activeMutationObservers(), observers);
     activeMutationObservers().clear();
     std::sort(observers.begin(), observers.end(), ObserverLessThan());
     for (size_t i = 0; i < observers.size(); ++i) {
         if (observers[i]->canDeliver())
             observers[i]->deliver();
         else
             suspendedMutationObservers().add(observers[i]);
     }
 }
 
+void MutationObserver::trace(Visitor* visitor)
+{
+    visitor->trace(m_records);
+    visitor->trace(m_registrations);
+}
+
 } // namespace WebCore