1/* 2 * Copyright (C) 2004 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 RUNTIME_ROOT_H_ 27#define RUNTIME_ROOT_H_ 28 29#include <heap/Strong.h> 30#include <heap/Weak.h> 31#include <heap/WeakInlines.h> 32#include <wtf/Forward.h> 33#include <wtf/HashCountedSet.h> 34#include <wtf/HashSet.h> 35#include <wtf/Noncopyable.h> 36#include <wtf/PassRefPtr.h> 37#include <wtf/RefCounted.h> 38 39namespace JSC { 40 41class Interpreter; 42class JSGlobalObject; 43 44namespace Bindings { 45 46class RootObject; 47class RuntimeObject; 48 49typedef HashCountedSet<JSObject*> ProtectCountSet; 50 51extern RootObject* findProtectingRootObject(JSObject*); 52extern RootObject* findRootObject(JSGlobalObject*); 53 54class RootObject : public RefCounted<RootObject>, private JSC::WeakHandleOwner { 55 friend class JavaJSObject; 56 57public: 58 virtual ~RootObject(); 59 60 static PassRefPtr<RootObject> create(const void* nativeHandle, JSGlobalObject*); 61 62 bool isValid() { return m_isValid; } 63 void invalidate(); 64 65 void gcProtect(JSObject*); 66 void gcUnprotect(JSObject*); 67 bool gcIsProtected(JSObject*); 68 69 const void* nativeHandle() const; 70 JSGlobalObject* globalObject() const; 71 void updateGlobalObject(JSGlobalObject*); 72 73 void addRuntimeObject(VM&, RuntimeObject*); 74 void removeRuntimeObject(RuntimeObject*); 75 76 struct InvalidationCallback { 77 virtual void operator()(RootObject*) = 0; 78 virtual ~InvalidationCallback(); 79 }; 80 void addInvalidationCallback(InvalidationCallback* callback) { m_invalidationCallbacks.add(callback); } 81 82private: 83 RootObject(const void* nativeHandle, JSGlobalObject*); 84 85 // WeakHandleOwner 86 virtual void finalize(JSC::Handle<JSC::Unknown>, void* context) override; 87 88 bool m_isValid; 89 90 const void* m_nativeHandle; 91 Strong<JSGlobalObject> m_globalObject; 92 93 ProtectCountSet m_protectCountSet; 94 HashMap<RuntimeObject*, JSC::Weak<RuntimeObject>> m_runtimeObjects; // We use a map to implement a set. 95 96 HashSet<InvalidationCallback*> m_invalidationCallbacks; 97}; 98 99} // namespace Bindings 100 101} // namespace JSC 102 103#endif // RUNTIME_ROOT_H_ 104