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/*
* Copyright (C) 2014 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 UserActivity_h
#define UserActivity_h
#if HAVE(NS_ACTIVITY)
#include <wtf/RetainPtr.h>
#include <wtf/RunLoop.h>
OBJC_CLASS NSString;
#endif
namespace WebCore {
// The UserActivity type is used to indicate to the operating system that
// a user initiated or visible action is taking place, and as such that
// resources should be allocated to the process accordingly.
class UserActivity {
public:
UserActivity(const char* description);
void beginActivity();
void endActivity();
bool isActive() const { return m_count; }
private:
size_t m_count;
#if HAVE(NS_ACTIVITY)
void hysteresisTimerFired();
bool isValid();
RetainPtr<NSString> m_description;
RunLoop::Timer<UserActivity> m_timer;
RetainPtr<id> m_activity;
#endif
};
} // namespace WebCore
using WebCore::UserActivity;
#endif // UserActivity_h
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