15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 2012 Google, Inc. All Rights Reserved. 35c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Redistribution and use in source and binary forms, with or without 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * modification, are permitted provided that the following conditions 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * are met: 75c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 1. Redistributions of source code must retain the above copyright 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer. 95c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 2. Redistributions in binary form must reproduce the above copyright 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer in the 115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * documentation and/or other materials provided with the distribution. 125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#ifndef RefCountedSupplement_h 275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#define RefCountedSupplement_h 285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 291e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "platform/Supplementable.h" 307757ec2eadfa2dd8ac2aeed0a4399e9b07ec38cbBen Murdoch#include "wtf/RefCounted.h" 317757ec2eadfa2dd8ac2aeed0a4399e9b07ec38cbBen Murdoch#include "wtf/RefPtr.h" 325c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)namespace WebCore { 345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)template<class T, class S> 365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)class RefCountedSupplement : public RefCounted<S> { 375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)public: 385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) typedef RefCountedSupplement<T, S> ThisType; 395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) virtual ~RefCountedSupplement() { } 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) virtual void hostDestroyed() { } 425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) class Wrapper : public Supplement<T> { 445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) public: 455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) explicit Wrapper(PassRefPtr<ThisType> wrapped) : m_wrapped(wrapped) { } 465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) virtual ~Wrapper() { m_wrapped->hostDestroyed(); } 47926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles)#if !ASSERT_DISABLED || defined(ADDRESS_SANITIZER) 485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) virtual bool isRefCountedWrapper() const OVERRIDE { return true; } 495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#endif 505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ThisType* wrapped() const { return m_wrapped.get(); } 515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) private: 525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) RefPtr<ThisType> m_wrapped; 545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) }; 555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 56926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles) static void provideTo(Supplementable<T>* host, const char* key, PassRefPtr<ThisType> supplement) 575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) { 585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) host->provideSupplement(key, adoptPtr(new Wrapper(supplement))); 595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 61926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles) static ThisType* from(Supplementable<T>* host, const char* key) 625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) { 635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) Supplement<T>* found = host->requireSupplement(key); 645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!found) 655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return 0; 66926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles) ASSERT_WITH_SECURITY_IMPLICATION(found->isRefCountedWrapper()); 675c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return static_cast<Wrapper*>(found)->wrapped(); 685c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 695c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)}; 705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} // namespace WebCore 725c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#endif // RefCountedSupplement_h 74