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-/*
- * Copyright (C) 2012 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 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 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 ArrayAllocationProfile_h
-#define ArrayAllocationProfile_h
-
-#include "IndexingType.h"
-#include "JSArray.h"
-
-namespace JSC {
-
-class ArrayAllocationProfile {
-public:
- ArrayAllocationProfile()
- : m_currentIndexingType(ArrayWithUndecided)
- , m_lastArray(0)
- {
- }
-
- IndexingType selectIndexingType()
- {
- if (m_lastArray && UNLIKELY(m_lastArray->structure()->indexingType() != m_currentIndexingType))
- updateIndexingType();
- return m_currentIndexingType;
- }
-
- JSArray* updateLastAllocation(JSArray* lastArray)
- {
- m_lastArray = lastArray;
- return lastArray;
- }
-
- JS_EXPORT_PRIVATE void updateIndexingType();
-
- static IndexingType selectIndexingTypeFor(ArrayAllocationProfile* profile)
- {
- if (!profile)
- return ArrayWithUndecided;
- return profile->selectIndexingType();
- }
-
- static JSArray* updateLastAllocationFor(ArrayAllocationProfile* profile, JSArray* lastArray)
- {
- if (profile)
- profile->updateLastAllocation(lastArray);
- return lastArray;
- }
-
-private:
-
- IndexingType m_currentIndexingType;
- JSArray* m_lastArray;
-};
-
-} // namespace JSC
-
-#endif // ArrayAllocationProfile_h
-