third_party/WebKit/Source/core/inspector/InstanceCounters.h

/*
* Copyright (C) 2012 Google 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:
*
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* notice, this list of conditions and the following disclaimer.
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* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
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* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef InstanceCounters_h
#define InstanceCounters_h

#include "core/CoreExport.h"
#include "wtf/Allocator.h"

#if ENABLE(ASSERT)
#include "wtf/MainThread.h"
#endif

namespace blink {

class InstanceCounters {
    STATIC_ONLY(InstanceCounters);
public:
    enum CounterType {
        ActiveDOMObjectCounter,
        AudioHandlerCounter,
        DocumentCounter,
        FrameCounter,
        JSEventListenerCounter,
        LayoutObjectCounter,
        NodeCounter,
        ResourceCounter,
        ScriptPromiseCounter,
        V8PerContextDataCounter,

        // This value must be the last.
        CounterTypeLength,
    };

    static inline void incrementCounter(CounterType type)
    {
        ASSERT(isMainThread());
        ++s_counters[type];
    }

    static inline void decrementCounter(CounterType type)
    {
        ASSERT(isMainThread());
        --s_counters[type];
    }

    CORE_EXPORT static int counterValue(CounterType);

private:
    CORE_EXPORT static int s_counters[CounterTypeLength];
};

} // namespace blink

#endif // !defined(InstanceCounters_h)