projects / apple / javascriptcore.git / blame
| Commit | Line | Data |
|---|---|---|
| 81345200 A |
1 | /* |
| 2 | * Copyright (C) 2013 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. AND ITS CONTRIBUTORS ``AS IS'' | |
| 14 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 15 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS | |
| 17 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 18 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 19 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 20 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 21 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 22 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
| 23 | * THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 | */ | |
| 25 | ||
| 26 | #ifndef WeakMapData_h | |
| 27 | #define WeakMapData_h | |
| 28 | ||
| 29 | #include "JSCell.h" | |
| 30 | #include "Structure.h" | |
| 31 | #include <wtf/HashFunctions.h> | |
| 32 | #include <wtf/HashMap.h> | |
| 33 | #include <wtf/MathExtras.h> | |
| 34 | ||
| 35 | namespace JSC { | |
| 36 | ||
| 37 | class WeakMapData : public JSCell { | |
| 38 | public: | |
| 39 | typedef JSCell Base; | |
| 40 | ||
| 41 | static WeakMapData* create(VM& vm) | |
| 42 | { | |
| 43 | WeakMapData* weakMapData = new (NotNull, allocateCell<WeakMapData>(vm.heap)) WeakMapData(vm); | |
| 44 | weakMapData->finishCreation(vm); | |
| 45 | return weakMapData; | |
| 46 | } | |
| 47 | ||
| 48 | static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype) | |
| 49 | { | |
| 50 | return Structure::create(vm, globalObject, prototype, TypeInfo(CompoundType, StructureFlags), info()); | |
| 51 | } | |
| 52 | ||
| 53 | static const bool needsDestruction = true; | |
| 54 | static const bool hasImmortalStructure = true; | |
| 55 | ||
| 56 | void set(VM&, JSObject*, JSValue); | |
| 57 | JSValue get(JSObject*); | |
| 58 | bool remove(JSObject*); | |
| 59 | bool contains(JSObject*); | |
| 60 | void clear(); | |
| 61 | ||
| 62 | DECLARE_INFO; | |
| 63 | ||
| 64 | static const unsigned StructureFlags = OverridesVisitChildren | StructureIsImmortal | Base::StructureFlags; | |
| 65 | ||
| 66 | private: | |
| 67 | WeakMapData(VM&); | |
| 68 | static void destroy(JSCell*); | |
| 69 | static void visitChildren(JSCell*, SlotVisitor&); | |
| 70 | void finishCreation(VM&); | |
| 71 | ||
| 72 | class DeadKeyCleaner : public UnconditionalFinalizer, public WeakReferenceHarvester { | |
| 73 | public: | |
| 74 | DeadKeyCleaner(WeakMapData* target) | |
| 75 | : m_target(target) | |
| 76 | { | |
| 77 | } | |
| 78 | private: | |
| 79 | virtual void visitWeakReferences(SlotVisitor&) override; | |
| 80 | virtual void finalizeUnconditionally() override; | |
| 81 | int m_liveKeyCount; | |
| 82 | WeakMapData* m_target; | |
| 83 | }; | |
| 84 | DeadKeyCleaner m_deadKeyCleaner; | |
| 85 | typedef HashMap<JSObject*, WriteBarrier<Unknown>> MapType; | |
| 86 | MapType m_map; | |
| 87 | }; | |
| 88 | ||
| 89 | } | |
| 90 | ||
| 91 | #endif /* !defined(WeakMapData_h) */ |