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/*
* Copyright (C) 2018 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 "MessagePortChannelRegistry.h"
#include "Logging.h"
#include <wtf/CompletionHandler.h>
#include <wtf/MainThread.h>
namespace WebCore {
MessagePortChannelRegistry::MessagePortChannelRegistry() = default;
MessagePortChannelRegistry::~MessagePortChannelRegistry()
{
ASSERT(m_openChannels.isEmpty());
}
void MessagePortChannelRegistry::didCreateMessagePortChannel(const MessagePortIdentifier& port1, const MessagePortIdentifier& port2)
{
LOG(MessagePorts, "Registry: Creating MessagePortChannel %p linking %s and %s", this, port1.logString().utf8().data(), port2.logString().utf8().data());
ASSERT(isMainThread());
MessagePortChannel::create(*this, port1, port2);
}
void MessagePortChannelRegistry::messagePortChannelCreated(MessagePortChannel& channel)
{
ASSERT(isMainThread());
auto result = m_openChannels.ensure(channel.port1(), [channel = &channel] {
return channel;
});
ASSERT(result.isNewEntry);
result = m_openChannels.ensure(channel.port2(), [channel = &channel] {
return channel;
});
ASSERT(result.isNewEntry);
}
void MessagePortChannelRegistry::messagePortChannelDestroyed(MessagePortChannel& channel)
{
ASSERT(isMainThread());
ASSERT(m_openChannels.get(channel.port1()) == &channel);
ASSERT(m_openChannels.get(channel.port2()) == &channel);
m_openChannels.remove(channel.port1());
m_openChannels.remove(channel.port2());
LOG(MessagePorts, "Registry: After removing channel %s there are %u channels left in the registry:", channel.logString().utf8().data(), m_openChannels.size());
}
void MessagePortChannelRegistry::didEntangleLocalToRemote(const MessagePortIdentifier& local, const MessagePortIdentifier& remote, ProcessIdentifier process)
{
ASSERT(isMainThread());
// The channel might be gone if the remote side was closed.
auto* channel = m_openChannels.get(local);
if (!channel)
return;
ASSERT_UNUSED(remote, channel->includesPort(remote));
channel->entanglePortWithProcess(local, process);
}
void MessagePortChannelRegistry::didDisentangleMessagePort(const MessagePortIdentifier& port)
{
ASSERT(isMainThread());
// The channel might be gone if the remote side was closed.
auto* channel = m_openChannels.get(port);
if (!channel)
return;
channel->disentanglePort(port);
}
void MessagePortChannelRegistry::didCloseMessagePort(const MessagePortIdentifier& port)
{
ASSERT(isMainThread());
LOG(MessagePorts, "Registry: MessagePort %s closed in registry", port.logString().utf8().data());
auto* channel = m_openChannels.get(port);
if (!channel)
return;
#ifndef NDEBUG
if (channel && channel->hasAnyMessagesPendingOrInFlight())
LOG(MessagePorts, "Registry: (Note) The channel closed for port %s had messages pending or in flight", port.logString().utf8().data());
#endif
channel->closePort(port);
// FIXME: When making message ports be multi-process, this should probably push a notification
// to the remaining port to tell it this port closed.
}
bool MessagePortChannelRegistry::didPostMessageToRemote(MessageWithMessagePorts&& message, const MessagePortIdentifier& remoteTarget)
{
ASSERT(isMainThread());
LOG(MessagePorts, "Registry: Posting message to MessagePort %s in registry", remoteTarget.logString().utf8().data());
// The channel might be gone if the remote side was closed.
auto* channel = m_openChannels.get(remoteTarget);
if (!channel) {
LOG(MessagePorts, "Registry: Could not find MessagePortChannel for port %s; It was probably closed. Message will be dropped.", remoteTarget.logString().utf8().data());
return false;
}
return channel->postMessageToRemote(WTFMove(message), remoteTarget);
}
void MessagePortChannelRegistry::takeAllMessagesForPort(const MessagePortIdentifier& port, CompletionHandler<void(Vector<MessageWithMessagePorts>&&, CompletionHandler<void()>&&)>&& callback)
{
ASSERT(isMainThread());
LOG(MessagePorts, "Registry: Taking all messages for MessagePort %s", port.logString().utf8().data());
// The channel might be gone if the remote side was closed.
auto* channel = m_openChannels.get(port);
if (!channel) {
callback({ }, [] { });
return;
}
channel->takeAllMessagesForPort(port, WTFMove(callback));
}
MessagePortChannel* MessagePortChannelRegistry::existingChannelContainingPort(const MessagePortIdentifier& port)
{
ASSERT(isMainThread());
return m_openChannels.get(port);
}
} // namespace WebCore
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