1/* 2 * Copyright (C) 2013, 2014 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef DFGCompilationKey_h 27#define DFGCompilationKey_h 28 29#include "DFGCompilationMode.h" 30#include <wtf/HashMap.h> 31 32namespace JSC { 33 34class CodeBlock; 35class CodeBlockSet; 36 37namespace DFG { 38 39class CompilationKey { 40public: 41 CompilationKey() 42 : m_profiledBlock(0) 43 , m_mode(InvalidCompilationMode) 44 { 45 } 46 47 CompilationKey(WTF::HashTableDeletedValueType) 48 : m_profiledBlock(0) 49 , m_mode(DFGMode) 50 { 51 } 52 53 CompilationKey(CodeBlock* profiledBlock, CompilationMode mode) 54 : m_profiledBlock(profiledBlock) 55 , m_mode(mode) 56 { 57 } 58 59 bool operator!() const 60 { 61 return !m_profiledBlock && m_mode == InvalidCompilationMode; 62 } 63 64 bool isHashTableDeletedValue() const 65 { 66 return !m_profiledBlock && m_mode != InvalidCompilationMode; 67 } 68 69 CodeBlock* profiledBlock() const { return m_profiledBlock; } 70 CompilationMode mode() const { return m_mode; } 71 72 bool operator==(const CompilationKey& other) const 73 { 74 return m_profiledBlock == other.m_profiledBlock 75 && m_mode == other.m_mode; 76 } 77 78 unsigned hash() const 79 { 80 return WTF::pairIntHash(WTF::PtrHash<CodeBlock*>::hash(m_profiledBlock), m_mode); 81 } 82 83 void dump(PrintStream&) const; 84 85private: 86 CodeBlock* m_profiledBlock; 87 CompilationMode m_mode; 88}; 89 90struct CompilationKeyHash { 91 static unsigned hash(const CompilationKey& key) { return key.hash(); } 92 static bool equal(const CompilationKey& a, const CompilationKey& b) { return a == b; } 93 static const bool safeToCompareToEmptyOrDeleted = true; 94}; 95 96} } // namespace JSC::DFG 97 98namespace WTF { 99 100template<typename T> struct DefaultHash; 101template<> struct DefaultHash<JSC::DFG::CompilationKey> { 102 typedef JSC::DFG::CompilationKeyHash Hash; 103}; 104 105template<typename T> struct HashTraits; 106template<> struct HashTraits<JSC::DFG::CompilationKey> : SimpleClassHashTraits<JSC::DFG::CompilationKey> { }; 107 108} // namespace WTF 109 110#endif // DFGCompilationKey_h 111 112