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/*
* 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>
#include <wtf/Threading.h>
#if OS(DARWIN)
#include <mach/mach.h>
#endif
namespace JSC {
class VM;
}
namespace WebCore {
enum ResourceUsageCollectionMode {
None = 0,
CPU = 1 << 0,
Memory = 1 << 1,
All = CPU | Memory,
};
class ResourceUsageThread {
WTF_MAKE_NONCOPYABLE(ResourceUsageThread);
public:
static void addObserver(void* key, ResourceUsageCollectionMode, std::function<void (const ResourceUsageData&)>);
static void removeObserver(void* key);
private:
friend NeverDestroyed<ResourceUsageThread>;
ResourceUsageThread();
static ResourceUsageThread& singleton();
void waitUntilObservers();
void notifyObservers(ResourceUsageData&&);
void recomputeCollectionMode() WTF_REQUIRES_LOCK(m_observersLock);
void createThreadIfNeeded();
NO_RETURN void threadBody();
void platformSaveStateBeforeStarting();
void platformCollectCPUData(JSC::VM*, ResourceUsageData&);
void platformCollectMemoryData(JSC::VM*, ResourceUsageData&);
RefPtr<Thread> m_thread;
Lock m_observersLock;
Condition m_condition;
HashMap<void*, std::pair<ResourceUsageCollectionMode, std::function<void(const ResourceUsageData&)>>> m_observers WTF_GUARDED_BY_LOCK(m_observersLock);
ResourceUsageCollectionMode m_collectionMode { None };
// 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 ENABLE(SAMPLING_PROFILER)
#if OS(DARWIN)
mach_port_t m_samplingProfilerMachThread { MACH_PORT_NULL };
#elif OS(LINUX)
pid_t m_samplingProfilerThreadID { 0 };
#endif
#endif
};
} // namespace WebCore
#endif // ENABLE(RESOURCE_USAGE)
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