1 files changed, 45 insertions, 0 deletions
diff --git a/Source/WebCore/bindings/js/JSDOMWrapperCache.cpp b/Source/WebCore/bindings/js/JSDOMWrapperCache.cpp
new file mode 100644
index 000000000..6d875d58a
--- /dev/null
+++ b/Source/WebCore/bindings/js/JSDOMWrapperCache.cpp
@@ -0,0 +1,45 @@
+/*
+ *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
+ *  Copyright (C) 2004-2011, 2013, 2016 Apple Inc. All rights reserved.
+ *  Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
+ *  Copyright (C) 2013 Michael Pruett <michael@68k.org>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "config.h"
+#include "JSDOMWrapperCache.h"
+
+#include <runtime/JSCInlines.h>
+
+using namespace JSC;
+
+namespace WebCore {
+
+Structure* getCachedDOMStructure(JSDOMGlobalObject& globalObject, const ClassInfo* classInfo)
+{
+    JSDOMStructureMap& structures = globalObject.structures(NoLockingNecessary);
+    return structures.get(classInfo).get();
+}
+
+Structure* cacheDOMStructure(JSDOMGlobalObject& globalObject, Structure* structure, const ClassInfo* classInfo)
+{
+    auto locker = lockDuringMarking(globalObject.vm().heap, globalObject.gcLock());
+    JSDOMStructureMap& structures = globalObject.structures(locker);
+    ASSERT(!structures.contains(classInfo));
+    return structures.set(classInfo, WriteBarrier<Structure>(globalObject.vm(), &globalObject, structure)).iterator->value.get();
+}
+
+} // namespace WebCore