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      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 #include "config.h"
     32 #include "V8DOMMap.h"
     33 
     34 #include "DOMData.h"
     35 #include "DOMDataStore.h"
     36 #include "MainThreadDOMData.h"
     37 #include "ScopedDOMDataStore.h"
     38 
     39 namespace WebCore {
     40 
     41 DOMDataStoreHandle::DOMDataStoreHandle()
     42     : m_store(new ScopedDOMDataStore(DOMData::getCurrent()))
     43 {
     44 }
     45 
     46 DOMDataStoreHandle::~DOMDataStoreHandle()
     47 {
     48 }
     49 
     50 static bool fasterDOMStoreAccess = false;
     51 
     52 static inline DOMDataStore& getDOMDataStore()
     53 {
     54     if (LIKELY(fasterDOMStoreAccess)) {
     55         ASSERT(WTF::isMainThread());
     56         return MainThreadDOMData::getCurrentMainThreadStore();
     57     }
     58 
     59     return DOMData::getCurrent()->getStore();
     60 }
     61 
     62 void enableFasterDOMStoreAccess()
     63 {
     64     fasterDOMStoreAccess = true;
     65 }
     66 
     67 DOMNodeMapping& getDOMNodeMap()
     68 {
     69     return getDOMDataStore().domNodeMap();
     70 }
     71 
     72 DOMWrapperMap<void>& getDOMObjectMap()
     73 {
     74     return getDOMDataStore().domObjectMap();
     75 }
     76 
     77 DOMWrapperMap<void>& getActiveDOMObjectMap()
     78 {
     79     return getDOMDataStore().activeDomObjectMap();
     80 }
     81 
     82 #if ENABLE(SVG)
     83 
     84 DOMWrapperMap<SVGElementInstance>& getDOMSVGElementInstanceMap()
     85 {
     86     return getDOMDataStore().domSvgElementInstanceMap();
     87 }
     88 
     89 #endif // ENABLE(SVG)
     90 
     91 void removeAllDOMObjectsInCurrentThread()
     92 {
     93     DOMDataStore& store = getDOMDataStore();
     94 
     95     v8::HandleScope scope;
     96 
     97     // The DOM objects with the following types only exist on the main thread.
     98     if (WTF::isMainThread()) {
     99         // Remove all DOM nodes.
    100         DOMData::removeObjectsFromWrapperMap<Node>(&store, store.domNodeMap());
    101 
    102 #if ENABLE(SVG)
    103         // Remove all SVG element instances in the wrapper map.
    104         DOMData::removeObjectsFromWrapperMap<SVGElementInstance>(&store, store.domSvgElementInstanceMap());
    105 #endif
    106     }
    107 
    108     // Remove all DOM objects in the wrapper map.
    109     DOMData::removeObjectsFromWrapperMap<void>(&store, store.domObjectMap());
    110 
    111     // Remove all active DOM objects in the wrapper map.
    112     DOMData::removeObjectsFromWrapperMap<void>(&store, store.activeDomObjectMap());
    113 }
    114 
    115 void visitDOMNodesInCurrentThread(DOMWrapperMap<Node>::Visitor* visitor)
    116 {
    117     v8::HandleScope scope;
    118 
    119     WTF::MutexLocker locker(DOMDataStore::allStoresMutex());
    120     DOMDataList& list = DOMDataStore::allStores();
    121     for (size_t i = 0; i < list.size(); ++i) {
    122         DOMDataStore* store = list[i];
    123         if (!store->domData()->owningThread() == WTF::currentThread())
    124             continue;
    125 
    126         store->domNodeMap().visit(store, visitor);
    127     }
    128 }
    129 
    130 void visitDOMObjectsInCurrentThread(DOMWrapperMap<void>::Visitor* visitor)
    131 {
    132     v8::HandleScope scope;
    133 
    134     WTF::MutexLocker locker(DOMDataStore::allStoresMutex());
    135     DOMDataList& list = DOMDataStore::allStores();
    136     for (size_t i = 0; i < list.size(); ++i) {
    137         DOMDataStore* store = list[i];
    138         if (!store->domData()->owningThread() == WTF::currentThread())
    139             continue;
    140 
    141         store->domObjectMap().visit(store, visitor);
    142     }
    143 }
    144 
    145 void visitActiveDOMObjectsInCurrentThread(DOMWrapperMap<void>::Visitor* visitor)
    146 {
    147     v8::HandleScope scope;
    148 
    149     WTF::MutexLocker locker(DOMDataStore::allStoresMutex());
    150     DOMDataList& list = DOMDataStore::allStores();
    151     for (size_t i = 0; i < list.size(); ++i) {
    152         DOMDataStore* store = list[i];
    153         if (!store->domData()->owningThread() == WTF::currentThread())
    154             continue;
    155 
    156         store->activeDomObjectMap().visit(store, visitor);
    157     }
    158 }
    159 
    160 #if ENABLE(SVG)
    161 
    162 void visitDOMSVGElementInstancesInCurrentThread(DOMWrapperMap<SVGElementInstance>::Visitor* visitor)
    163 {
    164     v8::HandleScope scope;
    165 
    166     WTF::MutexLocker locker(DOMDataStore::allStoresMutex());
    167     DOMDataList& list = DOMDataStore::allStores();
    168     for (size_t i = 0; i < list.size(); ++i) {
    169         DOMDataStore* store = list[i];
    170         if (!store->domData()->owningThread() == WTF::currentThread())
    171             continue;
    172 
    173         store->domSvgElementInstanceMap().visit(store, visitor);
    174     }
    175 }
    176 
    177 #endif
    178 
    179 } // namespace WebCore
    180