MessageReceiverMap.h   [plain text]

/*
 * Copyright (C) 2012 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

#include "StringReference.h"
#include <wtf/HashMap.h>
#include <wtf/text/CString.h>

namespace IPC {

class Connection;
class Encoder;
class Decoder;
class MessageReceiver;
enum class ReceiverName : uint8_t;

class MessageReceiverMap {
public:
    MessageReceiverMap();
    ~MessageReceiverMap();

    void addMessageReceiver(ReceiverName, MessageReceiver&);
    void addMessageReceiver(ReceiverName, uint64_t destinationID, MessageReceiver&);

    void removeMessageReceiver(ReceiverName);
    void removeMessageReceiver(ReceiverName, uint64_t destinationID);
    void removeMessageReceiver(MessageReceiver&);

    void invalidate();

    bool dispatchMessage(Connection&, Decoder&);
    bool dispatchSyncMessage(Connection&, Decoder&, std::unique_ptr<Encoder>&);

private:
    // Message receivers that don't require a destination ID.
    HashMap<ReceiverName, MessageReceiver*, WTF::IntHash<ReceiverName>, WTF::StrongEnumHashTraits<ReceiverName>> m_globalMessageReceivers;

    HashMap<std::pair<ReceiverName, uint64_t>, MessageReceiver*, DefaultHash<std::pair<ReceiverName, uint64_t>>, PairHashTraits<WTF::StrongEnumHashTraits<ReceiverName>, HashTraits<uint64_t>>> m_messageReceivers;
};

};

namespace WTF {

template<typename T> struct DefaultHash;
template<> struct DefaultHash<IPC::ReceiverName> : IntHash<IPC::ReceiverName> { };

}