/* * Copyright (C) 2017 Apple 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: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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. */ #pragma once #if USE(MEDIATOOLBOX) #include "SharedMemory.h" #include <WebCore/CARingBuffer.h> namespace WebKit { class SharedRingBufferStorage : public WebCore::CARingBufferStorage { public: class Client { public: virtual ~Client() = default; virtual void storageChanged(SharedMemory*) = 0; }; SharedRingBufferStorage(Client* client) : m_client(client) { } void invalidate() { m_client = nullptr; } RefPtr<SharedMemory> storage() const { return m_storage; } void setStorage(RefPtr<SharedMemory>&&); bool readOnly() const { return m_readOnly; } void setReadOnly(bool); // WebCore::CARingBufferStorage void allocate(size_t) final; void deallocate() final; void* data() final; private: Client* m_client; RefPtr<SharedMemory> m_storage; bool m_readOnly { false }; }; } #endif