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/*
* Copyright (C) 2015 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 ProcessThrottlerClient_h
#define ProcessThrottlerClient_h
#include <wtf/CompletionHandler.h>
namespace WebKit {
enum class IsSuspensionImminent : bool;
enum class ProcessThrottleState : uint8_t;
class ProcessThrottlerClient {
public:
virtual ~ProcessThrottlerClient() { }
virtual void sendPrepareToSuspend(IsSuspensionImminent, double remainingRunTime, CompletionHandler<void()>&&) = 0;
enum ResumeReason : bool { ForegroundActivity, BackgroundActivity };
virtual void sendProcessDidResume(ResumeReason) = 0;
virtual void didChangeThrottleState(ProcessThrottleState) { };
virtual ASCIILiteral clientName() const = 0;
virtual String environmentIdentifier() const { return emptyString(); }
virtual void prepareToDropLastAssertion(CompletionHandler<void()>&& completionHandler) { completionHandler(); }
virtual void didDropLastAssertion() { }
};
} // namespace WebKit
#endif // ProcessThrottlerClient_h
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