1 files changed, 130 insertions, 0 deletions
diff --git a/WebCore/bindings/v8/DOMData.cpp b/WebCore/bindings/v8/DOMData.cpp
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+++ b/WebCore/bindings/v8/DOMData.cpp
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+/*
+ * 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.
+ */
+
+#include "config.h"
+#include "DOMData.h"
+
+#include "ChildThreadDOMData.h"
+#include "MainThreadDOMData.h"
+
+namespace WebCore {
+
+DOMData::DOMData()
+    : m_delayedProcessingScheduled(false)
+    , m_isMainThread(WTF::isMainThread())
+    , m_owningThread(WTF::currentThread())
+{
+}
+
+DOMData* DOMData::getCurrent()
+{
+    if (WTF::isMainThread())
+        return getCurrentMainThread();
+
+    DEFINE_STATIC_LOCAL(WTF::ThreadSpecific<ChildThreadDOMData>, childThreadDOMData, ());
+    return childThreadDOMData;
+}
+
+DOMData* DOMData::getCurrentMainThread()
+{
+    ASSERT(WTF::isMainThread());
+    DEFINE_STATIC_LOCAL(MainThreadDOMData, mainThreadDOMData, ());
+    return &mainThreadDOMData;
+}
+
+void DOMData::ensureDeref(V8ClassIndex::V8WrapperType type, void* domObject)
+{
+    if (m_owningThread == WTF::currentThread()) {
+        // No need to delay the work. We can deref right now.
+        derefObject(type, domObject);
+        return;
+    }
+
+    // We need to do the deref on the correct thread.
+    m_delayedObjectMap.set(domObject, type);
+
+    // Post a task to the owning thread in order to process the delayed queue.
+    // FIXME: For now, we can only post to main thread due to WTF task posting limitation. We will fix this when we work on nested worker.
+    if (!m_delayedProcessingScheduled) {
+        m_delayedProcessingScheduled = true;
+        if (isMainThread())
+            WTF::callOnMainThread(&derefDelayedObjectsInCurrentThread, 0);
+    }
+}
+
+void DOMData::derefObject(V8ClassIndex::V8WrapperType type, void* domObject)
+{
+    switch (type) {
+    case V8ClassIndex::NODE:
+        static_cast<Node*>(domObject)->deref();
+        break;
+
+#define MakeCase(type, name)   \
+        case V8ClassIndex::type: static_cast<name*>(domObject)->deref(); break;
+    DOM_OBJECT_TYPES(MakeCase)   // This includes both active and non-active.
+#undef MakeCase
+
+#if ENABLE(SVG)
+#define MakeCase(type, name)     \
+        case V8ClassIndex::type: static_cast<name*>(domObject)->deref(); break;
+    SVG_OBJECT_TYPES(MakeCase)   // This also includes SVGElementInstance.
+#undef MakeCase
+
+#define MakeCase(type, name)     \
+        case V8ClassIndex::type:    \
+            static_cast<V8SVGPODTypeWrapper<name>*>(domObject)->deref(); break;
+    SVG_POD_NATIVE_TYPES(MakeCase)
+#undef MakeCase
+#endif
+
+    default:
+        ASSERT_NOT_REACHED();
+        break;
+    }
+}
+
+void DOMData::derefDelayedObjects()
+{
+    WTF::MutexLocker locker(DOMDataStore::allStoresMutex());
+
+    m_delayedProcessingScheduled = false;
+
+    for (DelayedObjectMap::iterator iter(m_delayedObjectMap.begin()); iter != m_delayedObjectMap.end(); ++iter)
+        derefObject(iter->second, iter->first);
+
+    m_delayedObjectMap.clear();
+}
+
+void DOMData::derefDelayedObjectsInCurrentThread(void*)
+{
+    getCurrent()->derefDelayedObjects();
+}
+
+} // namespace WebCore