/platform/external/webkit/WebCore/bindings/v8/DOMData.cpp

  1/*
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  4 * Redistribution and use in source and binary forms, with or without
  5 * modification, are permitted provided that the following conditions are
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  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.
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 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
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 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 29 */
 30
 31#include "config.h"
 32#include "DOMData.h"
 33
 34#include "ChildThreadDOMData.h"
 35#include "MainThreadDOMData.h"
 36#include "WebGLContextAttributes.h"
 37#include "WebGLUniformLocation.h"
 38
 39namespace WebCore {
 40
 41DOMData::DOMData()
 42    : m_delayedProcessingScheduled(false)
 43    , m_isMainThread(WTF::isMainThread())
 44    , m_owningThread(WTF::currentThread())
 45{
 46}
 47
 48DOMData::~DOMData()
 49{
 50}
 51
 52DOMData* DOMData::getCurrent()
 53{
 54    if (WTF::isMainThread())
 55        return MainThreadDOMData::getCurrent();
 56
 57    DEFINE_STATIC_LOCAL(WTF::ThreadSpecific<ChildThreadDOMData>, childThreadDOMData, ());
 58    return childThreadDOMData;
 59}
 60
 61void DOMData::ensureDeref(V8ClassIndex::V8WrapperType type, void* domObject)
 62{
 63    if (m_owningThread == WTF::currentThread()) {
 64        // No need to delay the work. We can deref right now.
 65        derefObject(type, domObject);
 66        return;
 67    }
 68
 69    // We need to do the deref on the correct thread.
 70    m_delayedObjectMap.set(domObject, type);
 71
 72    // Post a task to the owning thread in order to process the delayed queue.
 73    // FIXME: For now, we can only post to main thread due to WTF task posting limitation. We will fix this when we work on nested worker.
 74    if (!m_delayedProcessingScheduled) {
 75        m_delayedProcessingScheduled = true;
 76        if (isMainThread())
 77            WTF::callOnMainThread(&derefDelayedObjectsInCurrentThread, 0);
 78    }
 79}
 80
 81void DOMData::derefObject(V8ClassIndex::V8WrapperType type, void* domObject)
 82{
 83    switch (type) {
 84    case V8ClassIndex::NODE:
 85        static_cast<Node*>(domObject)->deref();
 86        break;
 87
 88#define MakeCase(type, name)   \
 89        case V8ClassIndex::type: static_cast<name*>(domObject)->deref(); break;
 90    DOM_OBJECT_TYPES(MakeCase)   // This includes both active and non-active.
 91#undef MakeCase
 92
 93#if ENABLE(SVG)
 94#define MakeCase(type, name)     \
 95        case V8ClassIndex::type: static_cast<name*>(domObject)->deref(); break;
 96    SVG_OBJECT_TYPES(MakeCase)   // This also includes SVGElementInstance.
 97#undef MakeCase
 98
 99#define MakeCase(type, name)     \
100        case V8ClassIndex::type:    \
101            static_cast<V8SVGPODTypeWrapper<name>*>(domObject)->deref(); break;
102    SVG_POD_NATIVE_TYPES(MakeCase)
103#undef MakeCase
104#endif
105
106    default:
107        ASSERT_NOT_REACHED();
108        break;
109    }
110}
111
112void DOMData::derefDelayedObjects()
113{
114    WTF::MutexLocker locker(DOMDataStore::allStoresMutex());
115
116    m_delayedProcessingScheduled = false;
117
118    for (DelayedObjectMap::iterator iter(m_delayedObjectMap.begin()); iter != m_delayedObjectMap.end(); ++iter)
119        derefObject(iter->second, iter->first);
120
121    m_delayedObjectMap.clear();
122}
123
124void DOMData::derefDelayedObjectsInCurrentThread(void*)
125{
126    getCurrent()->derefDelayedObjects();
127}
128
129} // namespace WebCore