Things to unfork.

Source/WebCore/bindings/dart/DartIsolateState.cpp

-// Copyright 2011, 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 "DartIsolateState.h"
-
-#include "DartController.h"
-#include "DartDOMWrapper.h"
-#include "DartUtilities.h"
-
-namespace WebCore {
-
-struct DartIsolateLink {
-    DartIsolateLink(Dart_Isolate isolate, DartIsolateLink* previous)
-        : isolate(isolate), previous(previous) {}
-
-    Dart_Isolate isolate;
-    DartIsolateLink* previous;
-};
-
-DartIsolateLink* DartIsolateState::m_current = 0;
-
-void DartIsolateState::pushLink(Dart_Isolate isolate)
-{
-    m_current = new DartIsolateLink(isolate, m_current);
-}
-
-void DartIsolateState::popLink()
-{
-    DartIsolateLink* previous = m_current->previous;
-    delete m_current;
-    m_current = previous;
-}
-
-// Creates a new isolates and sets it as the current.
-Dart_Isolate DartIsolateState::create(ScriptExecutionContext* context, void* data)
-{
-    if (m_current) {
-        ASSERT(m_current->isolate && m_current->isolate == Dart_CurrentIsolate());
-        Dart_ExitIsolate();
-    }
-    // FIXME: proper error reporting.
-    char* errorMsg = 0;
-    ASSERT(data);
-    Dart_Isolate isolate = Dart_CreateIsolate(DartUtilities::fullSnapshot(), data, &errorMsg);
-    pushLink(isolate);
-    ASSERT(Dart_CurrentIsolate() == isolate);
-    DartController::setupDOMEnabledIsolate(context);
-    return isolate;
-}
-
-// Push the given isolate as the current one.
-void DartIsolateState::push(Dart_Isolate isolate)
-{
-    if (m_current) {
-        Dart_Isolate current = Dart_CurrentIsolate();
-        ASSERT(current && m_current->isolate == current);
-        if (current != isolate) {
-            Dart_ExitIsolate();
-            Dart_EnterIsolate(isolate);
-        }
-    } else {
-        ASSERT(!Dart_CurrentIsolate());
-        Dart_EnterIsolate(isolate);
-    }
-    pushLink(isolate);
-}
-
-// Return the currently active isolate.
-Dart_Isolate DartIsolateState::current()
-{
-    ASSERT(m_current && m_current->isolate == Dart_CurrentIsolate());
-    return m_current->isolate;
-}
-
-// Pop the currently active isolate and restore the previous one (if any).
-void DartIsolateState::pop()
-{
-    ASSERT(m_current && m_current->isolate == Dart_CurrentIsolate());
-    DartIsolateLink* previous = m_current->previous;
-    if (previous) {
-        if (previous->isolate != m_current->isolate) {
-            Dart_ExitIsolate();
-            Dart_EnterIsolate(previous->isolate);
-        }
-    } else {
-        Dart_ExitIsolate();
-    }
-    popLink();
-}
-
-// Shutdown the given isolate.
-void DartIsolateState::shutdown(Dart_Isolate isolate)
-{
-    ASSERT(!m_current || m_current->isolate != isolate);
-
-    push(isolate);
-    // FIXME: clear event listeners.
-    // FIXME: clear console messages.
-    DartDOMMap* domMap = DartUtilities::domMapForIsolate(isolate);
-    for (DartDOMMap::iterator it = domMap->begin(); it != domMap->end(); ++it)
-        DartDOMWrapper::derefDOMObject(it->second, it->first);
-    pop();
-
-    if (m_current)
-        Dart_ExitIsolate();
-    Dart_EnterIsolate(isolate);
-    Dart_ShutdownIsolate();
-    DartUtilities::unregisterIsolateContext(isolate);
-    if (m_current)
-        Dart_EnterIsolate(m_current->isolate);
-}
-
-}