counterAccumulator.h

//
// Copyright 2018 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
 
#ifndef PXR_BASE_TRACE_COUNTER_ACCUMULATOR_H
#define PXR_BASE_TRACE_COUNTER_ACCUMULATOR_H
 
#include "pxr/pxr.h"
 
#include "pxr/base/trace/api.h"
#include "pxr/base/trace/collection.h"
 
#include "pxr/base/tf/token.h"
 
#include <map>
#include <unordered_map>
#include <vector>
 
PXR_NAMESPACE_OPEN_SCOPE
 
class TraceCounterAccumulator : private TraceCollection::Visitor {
public:
    using CounterValues = std::vector<std::pair<TraceEvent::TimeStamp, double>>;
    using CounterValuesMap =
        std::unordered_map<TfToken, CounterValues, TfToken::HashFunctor>;
    using CounterMap =
        std::unordered_map<TfToken, double, TfToken::HashFunctor>;
 
    TraceCounterAccumulator() = default;
 
    const CounterValuesMap& GetCounters() const { 
        return _counterValuesOverTime;
    }
 
    TRACE_API void SetCurrentValues(const CounterMap&);
 
    const CounterMap& GetCurrentValues() const {
        return _currentValues;
    }
 
    TRACE_API void Update(const TraceCollection& collection);
 
protected:
    virtual bool _AcceptsCategory(TraceCategoryId id) = 0;
 
private:
    // TraceCollection::Visitor Interface
    virtual void OnBeginCollection() override;
    virtual void OnEndCollection() override;
    virtual void OnBeginThread(const TraceThreadId&) override;
    virtual void OnEndThread(const TraceThreadId&) override;
    virtual bool AcceptsCategory(TraceCategoryId) override;
    virtual void OnEvent(
        const TraceThreadId&, const TfToken&, const TraceEvent&) override;
 
    struct _CounterValue {
        double value;
        bool isDelta;
    };
 
    using _CounterDeltaValues =
        std::multimap<TraceEvent::TimeStamp, _CounterValue>;
    using _CounterDeltaMap = std::map<TfToken, _CounterDeltaValues>;
 
    _CounterDeltaMap _counterDeltas;
    CounterValuesMap _counterValuesOverTime;
    CounterMap _currentValues;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif //PXR_BASE_TRACE_COUNTER_ACCUMULATOR_H