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/*
* 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.
*/
#ifndef ChildProcessProxy_h
#define ChildProcessProxy_h
#include "Connection.h"
#include "MessageReceiverMap.h"
#include "ProcessLauncher.h"
#include <wtf/ThreadSafeRefCounted.h>
namespace WebKit {
class ChildProcessProxy : ProcessLauncher::Client, public CoreIPC::Connection::Client, public ThreadSafeRefCounted<ChildProcessProxy> {
WTF_MAKE_NONCOPYABLE(ChildProcessProxy);
public:
ChildProcessProxy();
virtual ~ChildProcessProxy();
// FIXME: This function does an unchecked upcast, and it is only used in a deprecated code path. Would like to get rid of it.
static ChildProcessProxy* fromConnection(CoreIPC::Connection*);
void connect();
void terminate();
template<typename T> bool send(const T& message, uint64_t destinationID, unsigned messageSendFlags = 0);
template<typename U> bool sendSync(const U& message, const typename U::Reply&, uint64_t destinationID, double timeout = 1);
CoreIPC::Connection* connection() const
{
ASSERT(m_connection);
return m_connection.get();
}
void addMessageReceiver(CoreIPC::StringReference messageReceiverName, CoreIPC::MessageReceiver*);
void addMessageReceiver(CoreIPC::StringReference messageReceiverName, uint64_t destinationID, CoreIPC::MessageReceiver*);
void removeMessageReceiver(CoreIPC::StringReference messageReceiverName, uint64_t destinationID);
bool isValid() const { return m_connection; }
bool isLaunching() const;
bool canSendMessage() const { return isValid() || isLaunching(); }
PlatformProcessIdentifier processIdentifier() const { return m_processLauncher->processIdentifier(); }
protected:
void clearConnection();
void abortProcessLaunchIfNeeded();
// ProcessLauncher::Client
virtual void didFinishLaunching(ProcessLauncher*, CoreIPC::Connection::Identifier) OVERRIDE;
bool dispatchMessage(CoreIPC::Connection*, CoreIPC::MessageDecoder&);
bool dispatchSyncMessage(CoreIPC::Connection*, CoreIPC::MessageDecoder&, OwnPtr<CoreIPC::MessageEncoder>&);
private:
virtual void getLaunchOptions(ProcessLauncher::LaunchOptions&) = 0;
virtual void connectionWillOpen(CoreIPC::Connection*);
virtual void connectionWillClose(CoreIPC::Connection*);
bool sendMessage(PassOwnPtr<CoreIPC::MessageEncoder>, unsigned messageSendFlags);
Vector<std::pair<OwnPtr<CoreIPC::MessageEncoder>, unsigned> > m_pendingMessages;
RefPtr<ProcessLauncher> m_processLauncher;
RefPtr<CoreIPC::Connection> m_connection;
CoreIPC::MessageReceiverMap m_messageReceiverMap;
};
template<typename T>
bool ChildProcessProxy::send(const T& message, uint64_t destinationID, unsigned messageSendFlags)
{
COMPILE_ASSERT(!T::isSync, AsyncMessageExpected);
OwnPtr<CoreIPC::MessageEncoder> encoder = CoreIPC::MessageEncoder::create(T::receiverName(), T::name(), destinationID);
encoder->encode(message);
return sendMessage(encoder.release(), messageSendFlags);
}
template<typename U>
bool ChildProcessProxy::sendSync(const U& message, const typename U::Reply& reply, uint64_t destinationID, double timeout)
{
COMPILE_ASSERT(U::isSync, SyncMessageExpected);
if (!m_connection)
return false;
return connection()->sendSync(message, reply, destinationID, timeout);
}
} // namespace WebKit
#endif // ChildProcessProxy_h
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