| 1 | // -*- mode: c++; c-basic-offset: 4 -*- |
|---|
| 2 | /* |
|---|
| 3 | * Copyright (C) 2008 Apple Inc. All rights reserved. |
|---|
| 4 | * |
|---|
| 5 | * Redistribution and use in source and binary forms, with or without |
|---|
| 6 | * modification, are permitted provided that the following conditions |
|---|
| 7 | * are met: |
|---|
| 8 | * 1. Redistributions of source code must retain the above copyright |
|---|
| 9 | * notice, this list of conditions and the following disclaimer. |
|---|
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
|---|
| 11 | * notice, this list of conditions and the following disclaimer in the |
|---|
| 12 | * documentation and/or other materials provided with the distribution. |
|---|
| 13 | * |
|---|
| 14 | * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
|---|
| 15 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
|---|
| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
|---|
| 17 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
|---|
| 18 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
|---|
| 19 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
|---|
| 20 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
|---|
| 21 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
|---|
| 22 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
|---|
| 23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
|---|
| 24 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|---|
| 25 | */ |
|---|
| 26 | |
|---|
| 27 | #ifndef PutPropertySlot_h |
|---|
| 28 | #define PutPropertySlot_h |
|---|
| 29 | |
|---|
| 30 | #include <wtf/Assertions.h> |
|---|
| 31 | |
|---|
| 32 | namespace JSC { |
|---|
| 33 | |
|---|
| 34 | class JSObject; |
|---|
| 35 | class JSFunction; |
|---|
| 36 | |
|---|
| 37 | class PutPropertySlot { |
|---|
| 38 | public: |
|---|
| 39 | enum Type { Uncachable, ExistingProperty, NewProperty }; |
|---|
| 40 | |
|---|
| 41 | PutPropertySlot() |
|---|
| 42 | : m_type(Uncachable) |
|---|
| 43 | , m_base(0) |
|---|
| 44 | { |
|---|
| 45 | } |
|---|
| 46 | |
|---|
| 47 | void setExistingProperty(JSObject* base, size_t offset) |
|---|
| 48 | { |
|---|
| 49 | m_type = ExistingProperty; |
|---|
| 50 | m_base = base; |
|---|
| 51 | m_offset = offset; |
|---|
| 52 | } |
|---|
| 53 | |
|---|
| 54 | void setNewProperty(JSObject* base, size_t offset) |
|---|
| 55 | { |
|---|
| 56 | m_type = NewProperty; |
|---|
| 57 | m_base = base; |
|---|
| 58 | m_offset = offset; |
|---|
| 59 | } |
|---|
| 60 | |
|---|
| 61 | Type type() const { return m_type; } |
|---|
| 62 | JSObject* base() const { return m_base; } |
|---|
| 63 | |
|---|
| 64 | bool isCacheable() const { return m_type != Uncachable; } |
|---|
| 65 | size_t cachedOffset() const { |
|---|
| 66 | ASSERT(isCacheable()); |
|---|
| 67 | return m_offset; |
|---|
| 68 | } |
|---|
| 69 | private: |
|---|
| 70 | Type m_type; |
|---|
| 71 | JSObject* m_base; |
|---|
| 72 | size_t m_offset; |
|---|
| 73 | }; |
|---|
| 74 | |
|---|
| 75 | } // namespace JSC |
|---|
| 76 | |
|---|
| 77 | #endif // PutPropertySlot_h |
|---|
| 78 | |
|---|
