| /* |
| * Copyright (C) 2009 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 |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef DOMData_h |
| #define DOMData_h |
| |
| #include "DOMDataStore.h" |
| |
| namespace WebCore { |
| |
| // DOMData |
| // |
| // DOMData represents the all the DOM wrappers for a given thread. In |
| // particular, DOMData holds wrappers for all the isolated worlds in the |
| // thread. The DOMData for the main thread and the DOMData for child threads |
| // use different subclasses. |
| // |
| class DOMData : public Noncopyable { |
| public: |
| DOMData(); |
| #if PLATFORM(ANDROID) |
| virtual ~DOMData() { } |
| #endif |
| |
| static DOMData* getCurrent(); |
| virtual DOMDataStore& getStore() = 0; |
| |
| template<typename T> |
| static void handleWeakObject(DOMDataStore::DOMWrapperMapType, v8::Handle<v8::Object>, T* domObject); |
| |
| void forgetDelayedObject(void* object) { m_delayedObjectMap.take(object); } |
| |
| // This is to ensure that we will deref DOM objects from the owning thread, |
| // not the GC thread. The helper function will be scheduled by the GC |
| // thread to get called from the owning thread. |
| static void derefDelayedObjectsInCurrentThread(void*); |
| void derefDelayedObjects(); |
| |
| template<typename T> |
| static void removeObjectsFromWrapperMap(DOMWrapperMap<T>& domMap); |
| |
| ThreadIdentifier owningThread() const { return m_owningThread; } |
| |
| private: |
| typedef WTF::HashMap<void*, V8ClassIndex::V8WrapperType> DelayedObjectMap; |
| |
| void ensureDeref(V8ClassIndex::V8WrapperType type, void* domObject); |
| static void derefObject(V8ClassIndex::V8WrapperType type, void* domObject); |
| |
| // Stores all the DOM objects that are delayed to be processed when the |
| // owning thread gains control. |
| DelayedObjectMap m_delayedObjectMap; |
| |
| // The flag to indicate if the task to do the delayed process has |
| // already been posted. |
| bool m_delayedProcessingScheduled; |
| |
| bool m_isMainThread; |
| ThreadIdentifier m_owningThread; |
| }; |
| |
| template<typename T> |
| void DOMData::handleWeakObject(DOMDataStore::DOMWrapperMapType mapType, v8::Handle<v8::Object> v8Object, T* domObject) |
| { |
| ASSERT(WTF::isMainThread()); |
| DOMDataList& list = DOMDataStore::allStores(); |
| for (size_t i = 0; i < list.size(); ++i) { |
| DOMDataStore* store = list[i]; |
| |
| DOMDataStore::InternalDOMWrapperMap<T>* domMap = static_cast<DOMDataStore::InternalDOMWrapperMap<T>*>(store->getDOMWrapperMap(mapType)); |
| |
| v8::Handle<v8::Object> wrapper = domMap->get(domObject); |
| if (*wrapper == *v8Object) { |
| // Clear the JS reference. |
| domMap->forgetOnly(domObject); |
| ASSERT(store->domData()->owningThread() == WTF::currentThread()); |
| store->domData()->derefObject(V8DOMWrapper::domWrapperType(v8Object), domObject); |
| } |
| } |
| } |
| |
| template<typename T> |
| void DOMData::removeObjectsFromWrapperMap(DOMWrapperMap<T>& domMap) |
| { |
| for (typename WTF::HashMap<T*, v8::Object*>::iterator iter(domMap.impl().begin()); iter != domMap.impl().end(); ++iter) { |
| T* domObject = static_cast<T*>(iter->first); |
| v8::Persistent<v8::Object> v8Object(iter->second); |
| |
| V8ClassIndex::V8WrapperType type = V8DOMWrapper::domWrapperType(v8::Handle<v8::Object>::Cast(v8Object)); |
| |
| // Deref the DOM object. |
| derefObject(type, domObject); |
| |
| // Clear the JS wrapper. |
| v8Object.Dispose(); |
| } |
| domMap.impl().clear(); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // DOMData_h |