/* * Copyright (C) 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. * * 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 #if ENABLE(RESOURCE_USAGE) #include "ResourceUsageData.h" #include <array> #include <functional> #include <wtf/Condition.h> #include <wtf/HashMap.h> #include <wtf/Lock.h> #include <wtf/NeverDestroyed.h> #include <wtf/Noncopyable.h> namespace JSC { class VM; } namespace WebCore { class ResourceUsageThread { WTF_MAKE_NONCOPYABLE(ResourceUsageThread); public: static void addObserver(void* key, std::function<void (const ResourceUsageData&)>); static void removeObserver(void* key); private: friend NeverDestroyed<ResourceUsageThread>; ResourceUsageThread(); static ResourceUsageThread& singleton(); void waitUntilObservers(); void notifyObservers(ResourceUsageData&&); void createThreadIfNeeded(); void threadBody(); void platformThreadBody(JSC::VM*, ResourceUsageData&); RefPtr<Thread> m_thread; Lock m_lock; Condition m_condition; HashMap<void*, std::function<void (const ResourceUsageData&)>> m_observers; // Platforms may need to access some data from the common VM. // They should ensure their use of the VM is thread safe. JSC::VM* m_vm { nullptr }; }; #if PLATFORM(COCOA) struct TagInfo { TagInfo() { } size_t dirty { 0 }; size_t reclaimable { 0 }; }; const char* displayNameForVMTag(unsigned); size_t vmPageSize(); std::array<TagInfo, 256> pagesPerVMTag(); void logFootprintComparison(const std::array<TagInfo, 256>&, const std::array<TagInfo, 256>&); #endif } // namespace WebCore #endif // ENABLE(RESOURCE_USAGE)