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 PutPropertySlot()41 PutPropertySlot() 42 : m_type(Uncachable) 43 , m_base(0) 44 { 45 } 46 setExistingProperty(JSObject * base,size_t offset)47 void setExistingProperty(JSObject* base, size_t offset) 48 { 49 m_type = ExistingProperty; 50 m_base = base; 51 m_offset = offset; 52 } 53 setNewProperty(JSObject * base,size_t offset)54 void setNewProperty(JSObject* base, size_t offset) 55 { 56 m_type = NewProperty; 57 m_base = base; 58 m_offset = offset; 59 } 60 type()61 Type type() const { return m_type; } base()62 JSObject* base() const { return m_base; } 63 isCacheable()64 bool isCacheable() const { return m_type != Uncachable; } cachedOffset()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