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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "DOMDataStore.h"
#include "DOMWrapperMap.h"
#include "V8Binding.h"
#include "WebCoreMemoryInstrumentation.h"
#include <wtf/MainThread.h>
namespace WebCore {
DOMDataStore::DOMDataStore(Type type)
: m_type(type)
{
V8PerIsolateData::current()->registerDOMDataStore(this);
}
DOMDataStore::~DOMDataStore()
{
ASSERT(m_type != MainWorld); // We never actually destruct the main world's DOMDataStore.
V8PerIsolateData::current()->unregisterDOMDataStore(this);
m_wrapperMap.clear();
}
DOMDataStore* DOMDataStore::current(v8::Isolate* isolate)
{
DEFINE_STATIC_LOCAL(DOMDataStore, mainWorldDOMDataStore, (MainWorld));
V8PerIsolateData* data = isolate ? V8PerIsolateData::from(isolate) : V8PerIsolateData::current();
if (UNLIKELY(!!data->domDataStore()))
return data->domDataStore();
if (DOMWrapperWorld::isolatedWorldsExist()) {
DOMWrapperWorld* isolatedWorld = DOMWrapperWorld::isolated(v8::Context::GetEntered());
if (UNLIKELY(!!isolatedWorld))
return isolatedWorld->isolatedWorldDOMDataStore();
}
return &mainWorldDOMDataStore;
}
void DOMDataStore::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
{
MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::Binding);
info.addMember(m_wrapperMap);
}
void DOMDataStore::weakCallback(v8::Persistent<v8::Value> value, void* context)
{
ScriptWrappable* key = static_cast<ScriptWrappable*>(context);
ASSERT(value->IsObject());
v8::Persistent<v8::Object> wrapper = v8::Persistent<v8::Object>::Cast(value);
ASSERT(key->wrapper() == wrapper);
// Note: |object| might not be equal to |key|, e.g., if ScriptWrappable isn't a left-most base class.
void* object = toNative(wrapper);
WrapperTypeInfo* info = toWrapperTypeInfo(wrapper);
ASSERT(info->derefObjectFunction);
key->clearWrapper();
value.Dispose();
value.Clear();
// FIXME: I noticed that 50%~ of minor GC cycle times can be consumed
// inside key->deref(), which causes Node destructions. We should
// make Node destructions incremental.
info->derefObject(object);
}
} // namespace WebCore
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