Code drop from //branches/cupcake/...@124589

1 files changed, 70 insertions, 0 deletions

diff --git a/WebCore/dom/ActiveDOMObject.h b/WebCore/dom/ActiveDOMObject.h
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+++ b/WebCore/dom/ActiveDOMObject.h
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+/*
+ * Copyright (C) 2008 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 ActiveDOMObject_h
+#define ActiveDOMObject_h
+
+#include <wtf/Assertions.h>
+
+namespace WebCore {
+
+    class ScriptExecutionContext;
+
+    class ActiveDOMObject {
+    public:
+        ActiveDOMObject(ScriptExecutionContext*, void* upcastPointer);
+
+        ScriptExecutionContext* scriptExecutionContext() const { return m_scriptExecutionContext; }
+        bool hasPendingActivity() { return m_pendingActivityCount; }
+
+        virtual void contextDestroyed();
+        virtual void stop();
+
+    protected:
+        virtual ~ActiveDOMObject();
+
+        template<class T> void setPendingActivity(T* thisObject)
+        {
+            ASSERT(thisObject == this);
+            thisObject->ref();
+            m_pendingActivityCount++;
+        }
+
+        template<class T> void unsetPendingActivity(T* thisObject)
+        {
+            ASSERT(m_pendingActivityCount > 0);
+            --m_pendingActivityCount;
+            thisObject->deref();
+        }
+
+    private:
+        ScriptExecutionContext* m_scriptExecutionContext;
+        unsigned m_pendingActivityCount;
+    };
+
+} // namespace WebCore
+
+#endif // ActiveDOMObject_h