--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/API/APIShims.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2009 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 APIShims_h
+#define APIShims_h
+
+#include "CallFrame.h"
+#include "JSLock.h"
+#include <wtf/WTFThreadData.h>
+
+namespace JSC {
+
+class APIEntryShimWithoutLock {
+protected:
+    APIEntryShimWithoutLock(JSGlobalData* globalData, bool registerThread)
+        : m_globalData(globalData)
+        , m_entryIdentifierTable(wtfThreadData().setCurrentIdentifierTable(globalData->identifierTable))
+    {
+        if (registerThread)
+            globalData->heap.registerThread();
+        m_globalData->timeoutChecker.start();
+    }
+
+    ~APIEntryShimWithoutLock()
+    {
+        m_globalData->timeoutChecker.stop();
+        wtfThreadData().setCurrentIdentifierTable(m_entryIdentifierTable);
+    }
+
+private:
+    JSGlobalData* m_globalData;
+    IdentifierTable* m_entryIdentifierTable;
+};
+
+class APIEntryShim : public APIEntryShimWithoutLock {
+public:
+    // Normal API entry
+    APIEntryShim(ExecState* exec, bool registerThread = true)
+        : APIEntryShimWithoutLock(&exec->globalData(), registerThread)
+        , m_lock(exec)
+    {
+    }
+
+    // JSPropertyNameAccumulator only has a globalData.
+    APIEntryShim(JSGlobalData* globalData, bool registerThread = true)
+        : APIEntryShimWithoutLock(globalData, registerThread)
+        , m_lock(globalData->isSharedInstance() ? LockForReal : SilenceAssertionsOnly)
+    {
+    }
+
+private:
+    JSLock m_lock;
+};
+
+class APICallbackShim {
+public:
+    APICallbackShim(ExecState* exec)
+        : m_dropAllLocks(exec)
+        , m_globalData(&exec->globalData())
+    {
+        wtfThreadData().resetCurrentIdentifierTable();
+    }
+
+    ~APICallbackShim()
+    {
+        wtfThreadData().setCurrentIdentifierTable(m_globalData->identifierTable);
+    }
+
+private:
+    JSLock::DropAllLocks m_dropAllLocks;
+    JSGlobalData* m_globalData;
+};
+
+}
+
+#endif