Source/WebKit/Platform/IPC/MessageReceiverMap.cpp

/*
 * 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.
 */

#include "config.h"
#include "MessageReceiverMap.h"

#include "Decoder.h"
#include "MessageReceiver.h"

namespace IPC {

MessageReceiverMap::MessageReceiverMap()
{
}

MessageReceiverMap::~MessageReceiverMap()
{
}

void MessageReceiverMap::addMessageReceiver(ReceiverName messageReceiverName, MessageReceiver& messageReceiver)
{
    ASSERT(!m_globalMessageReceivers.contains(messageReceiverName));

    messageReceiver.willBeAddedToMessageReceiverMap();
    m_globalMessageReceivers.set(messageReceiverName, messageReceiver);
}

void MessageReceiverMap::addMessageReceiver(ReceiverName messageReceiverName, uint64_t destinationID, MessageReceiver& messageReceiver)
{
    ASSERT(destinationID);
    ASSERT(!m_messageReceivers.contains(std::make_pair(messageReceiverName, destinationID)));
    ASSERT(!m_globalMessageReceivers.contains(messageReceiverName));

    messageReceiver.willBeAddedToMessageReceiverMap();
    m_messageReceivers.set(std::make_pair(messageReceiverName, destinationID), messageReceiver);
}

void MessageReceiverMap::removeMessageReceiver(ReceiverName messageReceiverName)
{
    auto it = m_globalMessageReceivers.find(messageReceiverName);
    if (it == m_globalMessageReceivers.end()) {
        ASSERT_NOT_REACHED();
        return;
    }

    if (it->value)
        it->value->willBeRemovedFromMessageReceiverMap();
    m_globalMessageReceivers.remove(it);
}

void MessageReceiverMap::removeMessageReceiver(ReceiverName messageReceiverName, uint64_t destinationID)
{
    auto it = m_messageReceivers.find(std::make_pair(messageReceiverName, destinationID));
    if (it == m_messageReceivers.end()) {
        ASSERT_NOT_REACHED();
        return;
    }

    if (it->value)
        it->value->willBeRemovedFromMessageReceiverMap();
    m_messageReceivers.remove(it);
}

void MessageReceiverMap::removeMessageReceiver(MessageReceiver& messageReceiver)
{
    Vector<ReceiverName> globalReceiversToRemove;
    for (auto& [name, receiver] : m_globalMessageReceivers) {
        if (receiver == &messageReceiver)
            globalReceiversToRemove.append(name);
    }

    for (auto& globalReceiverToRemove : globalReceiversToRemove)
        removeMessageReceiver(globalReceiverToRemove);

    Vector<std::pair<ReceiverName, uint64_t>> receiversToRemove;
    for (auto& [nameAndDestinationID, receiver] : m_messageReceivers) {
        if (receiver == &messageReceiver)
            receiversToRemove.append(std::make_pair(nameAndDestinationID.first, nameAndDestinationID.second));
    }

    for (auto& [name, destinationID] : receiversToRemove)
        removeMessageReceiver(name, destinationID);
}

void MessageReceiverMap::invalidate()
{
    for (auto& messageReceiver : m_globalMessageReceivers.values())
        messageReceiver->willBeRemovedFromMessageReceiverMap();
    m_globalMessageReceivers.clear();


    for (auto& messageReceiver : m_messageReceivers.values())
        messageReceiver->willBeRemovedFromMessageReceiverMap();
    m_messageReceivers.clear();
}

bool MessageReceiverMap::dispatchMessage(Connection& connection, Decoder& decoder)
{
    if (auto messageReceiver = m_globalMessageReceivers.get(decoder.messageReceiverName())) {
        ASSERT(!decoder.destinationID());

        messageReceiver->didReceiveMessage(connection, decoder);
        return true;
    }

    if (auto messageReceiver = m_messageReceivers.get(std::make_pair(decoder.messageReceiverName(), decoder.destinationID()))) {
        messageReceiver->didReceiveMessage(connection, decoder);
        return true;
    }

    return false;
}

bool MessageReceiverMap::dispatchSyncMessage(Connection& connection, Decoder& decoder, UniqueRef<Encoder>& replyEncoder)
{
    if (auto messageReceiver = m_globalMessageReceivers.get(decoder.messageReceiverName())) {
        ASSERT(!decoder.destinationID());
        return messageReceiver->didReceiveSyncMessage(connection, decoder, replyEncoder);
    }

    if (auto messageReceiver = m_messageReceivers.get(std::make_pair(decoder.messageReceiverName(), decoder.destinationID())))
        return messageReceiver->didReceiveSyncMessage(connection, decoder, replyEncoder);

    return false;
}

} // namespace IPC