--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/v8/V8GCController.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,91 @@
+/*
+ * 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 V8GCController_h
+#define V8GCController_h
+
+#include <v8.h>
+
+namespace WebCore {
+
+#ifndef NDEBUG
+
+#define GlobalHandleTypeList(V)   \
+    V(PROXY)                      \
+    V(NPOBJECT)                   \
+    V(SCHEDULED_ACTION)           \
+    V(EVENT_LISTENER)             \
+    V(NODE_FILTER)                \
+    V(SCRIPTINSTANCE)             \
+    V(SCRIPTVALUE)                \
+    V(DATASOURCE)
+
+
+    // Host information of persistent handles.
+    enum GlobalHandleType {
+#define ENUM(name) name,
+        GlobalHandleTypeList(ENUM)
+#undef ENUM
+    };
+
+    class GlobalHandleInfo {
+    public:
+        GlobalHandleInfo(void* host, GlobalHandleType type) : m_host(host), m_type(type) { }
+        void* m_host;
+        GlobalHandleType m_type;
+    };
+
+#endif // NDEBUG
+
+    class V8GCController {
+    public:
+        // Protect/Unprotect JS wrappers of a DOM object.
+        static void gcProtect(void* domObject);
+        static void gcUnprotect(void* domObject);
+
+#ifndef NDEBUG
+        // For debugging and leak detection purpose.
+        static void registerGlobalHandle(GlobalHandleType, void*, v8::Persistent<v8::Value>);
+        static void unregisterGlobalHandle(void*, v8::Persistent<v8::Value>);
+#endif
+
+        static void gcPrologue();
+        static void gcEpilogue();
+
+        static void checkMemoryUsage();
+
+    private:
+        // Estimate of current working set.
+        static int workingSetEstimateMB;
+    };
+
+}
+
+#endif // V8GCController_h