/* * 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. */ #ifndef ScopedPersistent_h #define ScopedPersistent_h #include <v8.h> #include "wtf/Noncopyable.h" namespace WebCore { template<typename T> class ScopedPersistent { WTF_MAKE_NONCOPYABLE(ScopedPersistent); public: ScopedPersistent() { } ScopedPersistent(v8::Isolate* isolate, v8::Handle<T> handle) : m_handle(isolate, handle) { } ~ScopedPersistent() { clear(); } ALWAYS_INLINE v8::Local<T> newLocal(v8::Isolate* isolate) const { return v8::Local<T>::New(isolate, m_handle); } template<typename P> void setWeak(P* parameters, void (*callback)(const v8::WeakCallbackData<T, P>&)) { m_handle.SetWeak(parameters, callback); } bool isEmpty() const { return m_handle.IsEmpty(); } bool isWeak() const { return m_handle.IsWeak(); } void set(v8::Isolate* isolate, v8::Handle<T> handle) { m_handle.Reset(isolate, handle); } // Note: This is clear in the OwnPtr sense, not the v8::Handle sense. void clear() { m_handle.Reset(); } bool operator==(const ScopedPersistent<T>& other) { return m_handle == other.m_handle; } template <class S> bool operator==(const v8::Handle<S> other) const { return m_handle == other; } private: // FIXME: This function does an unsafe handle access. Remove it. friend class V8AbstractEventListener; friend class V8PerIsolateData; ALWAYS_INLINE v8::Persistent<T>& getUnsafe() { return m_handle; } v8::Persistent<T> m_handle; }; } // namespace WebCore #endif // ScopedPersistent_h