/* * Copyright (C) 2019 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. */ #pragma once #include <WebCore/Timer.h> #include <wtf/Deque.h> namespace WebKit { class Download; class DownloadMonitor { WTF_MAKE_NONCOPYABLE(DownloadMonitor); WTF_MAKE_FAST_ALLOCATED; public: DownloadMonitor(Download&); void applicationDidEnterBackground(); void applicationWillEnterForeground(); void downloadReceivedBytes(uint64_t); void timerFired(); private: Download& m_download; double measuredThroughputRate() const; uint32_t testSpeedMultiplier() const; struct Timestamp { MonotonicTime time; uint64_t bytesReceived; }; static constexpr size_t timestampCapacity = 10; Deque<Timestamp, timestampCapacity> m_timestamps; WebCore::Timer m_timer { *this, &DownloadMonitor::timerFired }; size_t m_interval { 0 }; }; } // namespace WebKit