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/*
* Copyright (C) 2010 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 ChildProcess_h
#define ChildProcess_h
#include "Connection.h"
#include "MessageReceiverMap.h"
#include "MessageSender.h"
#include <WebCore/RunLoop.h>
#include <wtf/HashMap.h>
#include <wtf/RetainPtr.h>
#include <wtf/text/StringHash.h>
#include <wtf/text/WTFString.h>
namespace WebKit {
class SandboxInitializationParameters;
struct ChildProcessInitializationParameters {
String uiProcessName;
String clientIdentifier;
CoreIPC::Connection::Identifier connectionIdentifier;
HashMap<String, String> extraInitializationData;
};
class ChildProcess : protected CoreIPC::Connection::Client, public CoreIPC::MessageSender {
WTF_MAKE_NONCOPYABLE(ChildProcess);
public:
void initialize(const ChildProcessInitializationParameters&);
// disable and enable termination of the process. when disableTermination is called, the
// process won't terminate unless a corresponding disableTermination call is made.
void disableTermination();
void enableTermination();
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);
#if PLATFORM(MAC)
void setProcessSuppressionEnabled(bool);
bool processSuppressionEnabled() const { return !m_processSuppressionAssertion; }
void incrementActiveTaskCount();
void decrementActiveTaskCount();
void setApplicationIsDaemon();
#else
void incrementActiveTaskCount() { }
void decrementActiveTaskCount() { }
#endif
CoreIPC::Connection* parentProcessConnection() const { return m_connection.get(); }
CoreIPC::MessageReceiverMap& messageReceiverMap() { return m_messageReceiverMap; }
protected:
explicit ChildProcess();
virtual ~ChildProcess();
void setTerminationTimeout(double seconds) { m_terminationTimeout = seconds; }
virtual void initializeProcess(const ChildProcessInitializationParameters&);
virtual void initializeProcessName(const ChildProcessInitializationParameters&);
virtual void initializeSandbox(const ChildProcessInitializationParameters&, SandboxInitializationParameters&);
virtual void initializeConnection(CoreIPC::Connection*);
virtual bool shouldTerminate() = 0;
virtual void terminate();
private:
// CoreIPC::MessageSender
virtual CoreIPC::Connection* messageSenderConnection() OVERRIDE;
virtual uint64_t messageSenderDestinationID() OVERRIDE;
void terminationTimerFired();
void platformInitialize();
// The timeout, in seconds, before this process will be terminated if termination
// has been enabled. If the timeout is 0 seconds, the process will be terminated immediately.
double m_terminationTimeout;
// A termination counter; when the counter reaches zero, the process will be terminated
// after a given period of time.
unsigned m_terminationCounter;
WebCore::RunLoop::Timer<ChildProcess> m_terminationTimer;
RefPtr<CoreIPC::Connection> m_connection;
CoreIPC::MessageReceiverMap m_messageReceiverMap;
#if PLATFORM(MAC)
void suspensionHysteresisTimerFired();
void setProcessSuppressionEnabledInternal(bool);
size_t m_activeTaskCount;
bool m_shouldSuspend;
WebCore::RunLoop::Timer<ChildProcess> m_suspensionHysteresisTimer;
RetainPtr<id> m_processSuppressionAssertion;
#endif
};
} // namespace WebKit
#endif // ChildProcess_h
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