| /* |
| * Copyright (C) 2014-2017 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. AND ITS 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 APPLE INC. OR ITS 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. |
| */ |
| |
| #pragma once |
| |
| #include "CellState.h" |
| #include "IndexingType.h" |
| #include "JSTypeInfo.h" |
| #include "StructureID.h" |
| |
| namespace JSC { |
| |
| class TypeInfoBlob { |
| friend class LLIntOffsetsExtractor; |
| public: |
| TypeInfoBlob() = default; |
| |
| TypeInfoBlob(IndexingType indexingModeIncludingHistory, const TypeInfo& typeInfo) |
| { |
| u.fields.indexingModeIncludingHistory = indexingModeIncludingHistory; |
| u.fields.type = typeInfo.type(); |
| u.fields.inlineTypeFlags = typeInfo.inlineTypeFlags(); |
| u.fields.defaultCellState = CellState::DefinitelyWhite; |
| } |
| |
| void operator=(const TypeInfoBlob& other) { u.word = other.u.word; } |
| |
| IndexingType indexingModeIncludingHistory() const { return u.fields.indexingModeIncludingHistory; } |
| Dependency fencedIndexingModeIncludingHistory(IndexingType& indexingType) |
| { |
| return Dependency::loadAndFence(&u.fields.indexingModeIncludingHistory, indexingType); |
| } |
| void setIndexingModeIncludingHistory(IndexingType indexingModeIncludingHistory) { u.fields.indexingModeIncludingHistory = indexingModeIncludingHistory; } |
| JSType type() const { return u.fields.type; } |
| TypeInfo::InlineTypeFlags inlineTypeFlags() const { return u.fields.inlineTypeFlags; } |
| |
| TypeInfo typeInfo(TypeInfo::OutOfLineTypeFlags outOfLineTypeFlags) const { return TypeInfo(type(), inlineTypeFlags(), outOfLineTypeFlags); } |
| |
| int32_t blob() const { return u.word; } |
| |
| static ptrdiff_t indexingModeIncludingHistoryOffset() |
| { |
| return OBJECT_OFFSETOF(TypeInfoBlob, u.fields.indexingModeIncludingHistory); |
| } |
| |
| private: |
| union Data { |
| struct { |
| IndexingType indexingModeIncludingHistory; |
| JSType type; |
| TypeInfo::InlineTypeFlags inlineTypeFlags; |
| CellState defaultCellState; |
| } fields; |
| int32_t word; |
| |
| Data() { word = 0xbbadbeef; } |
| }; |
| |
| Data u; |
| }; |
| |
| } // namespace JSC |