/* * Copyright (C) 2010, 2016 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. * 3. Neither the name of Apple Inc. ("Apple") nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "JSRunLoopTimer.h" #include <wtf/RefPtr.h> #if USE(CF) #include <CoreFoundation/CoreFoundation.h> #endif namespace JSC { class FullGCActivityCallback; class Heap; class JS_EXPORT_PRIVATE GCActivityCallback : public JSRunLoopTimer { public: using Base = JSRunLoopTimer; static RefPtr<FullGCActivityCallback> createFullTimer(Heap*); static RefPtr<GCActivityCallback> createEdenTimer(Heap*); GCActivityCallback(Heap*); void doWork() override; virtual void doCollection() = 0; virtual void didAllocate(size_t); virtual void willCollect(); virtual void cancel(); bool isEnabled() const { return m_enabled; } void setEnabled(bool enabled) { m_enabled = enabled; } static bool s_shouldCreateGCTimer; MonotonicTime nextFireTime(); protected: virtual Seconds lastGCLength() = 0; virtual double gcTimeSlice(size_t bytes) = 0; virtual double deathRate() = 0; GCActivityCallback(VM* vm) : Base(vm) , m_enabled(true) , m_delay(s_decade) { } bool m_enabled; protected: void cancelTimer(); void scheduleTimer(Seconds); private: Seconds m_delay; }; } // namespace JSC