1 /* 2 * Copyright (C) 2009 Google 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef DOMDataStore_h 32 #define DOMDataStore_h 33 34 #include "V8DOMMap.h" 35 #include "V8Node.h" 36 37 #include <v8.h> 38 #include <wtf/HashMap.h> 39 #include <wtf/MainThread.h> 40 #include <wtf/Noncopyable.h> 41 #include <wtf/OwnPtr.h> 42 #include <wtf/StdLibExtras.h> 43 #include <wtf/Threading.h> 44 #include <wtf/ThreadSpecific.h> 45 #include <wtf/Vector.h> 46 47 namespace WebCore { 48 49 class DOMData; 50 class DOMDataStore; 51 52 typedef WTF::Vector<DOMDataStore*> DOMDataList; 53 54 // DOMDataStore 55 // 56 // DOMDataStore is the backing store that holds the maps between DOM objects 57 // and JavaScript objects. In general, each thread can have multiple backing 58 // stores, one per isolated world. 59 // 60 // This class doesn't manage the lifetime of the store. The data store 61 // lifetime is managed by subclasses. 62 // 63 class DOMDataStore { 64 WTF_MAKE_NONCOPYABLE(DOMDataStore); 65 public: 66 enum DOMWrapperMapType { 67 DOMNodeMap, 68 DOMObjectMap, 69 ActiveDOMObjectMap, 70 #if ENABLE(SVG) 71 DOMSVGElementInstanceMap 72 #endif 73 }; 74 75 DOMDataStore(DOMData*); 76 virtual ~DOMDataStore(); 77 78 // A list of all DOMDataStore objects in the current V8 instance (thread). Normally, each World has a DOMDataStore. 79 static DOMDataList& allStores(); 80 // Mutex to protect against concurrent access of DOMDataList. 81 static WTF::Mutex& allStoresMutex(); 82 domData()83 DOMData* domData() const { return m_domData; } 84 85 void* getDOMWrapperMap(DOMWrapperMapType); 86 domNodeMap()87 DOMNodeMapping& domNodeMap() { return *m_domNodeMap; } domObjectMap()88 DOMWrapperMap<void>& domObjectMap() { return *m_domObjectMap; } activeDomObjectMap()89 DOMWrapperMap<void>& activeDomObjectMap() { return *m_activeDomObjectMap; } 90 #if ENABLE(SVG) domSvgElementInstanceMap()91 DOMWrapperMap<SVGElementInstance>& domSvgElementInstanceMap() { return *m_domSvgElementInstanceMap; } 92 #endif 93 94 // Need by V8GCController. 95 static void weakActiveDOMObjectCallback(v8::Persistent<v8::Value> v8Object, void* domObject); 96 97 protected: 98 static void weakNodeCallback(v8::Persistent<v8::Value> v8Object, void* domObject); 99 static void weakDOMObjectCallback(v8::Persistent<v8::Value> v8Object, void* domObject); 100 #if ENABLE(SVG) 101 static void weakSVGElementInstanceCallback(v8::Persistent<v8::Value> v8Object, void* domObject); 102 #endif 103 104 DOMNodeMapping* m_domNodeMap; 105 DOMWrapperMap<void>* m_domObjectMap; 106 DOMWrapperMap<void>* m_activeDomObjectMap; 107 #if ENABLE(SVG) 108 DOMWrapperMap<SVGElementInstance>* m_domSvgElementInstanceMap; 109 #endif 110 111 private: 112 // A back-pointer to the DOMData to which we belong. 113 DOMData* m_domData; 114 }; 115 116 } // namespace WebCore 117 118 #endif // DOMDataStore_h 119