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rocksdb/util/statistics.h

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1.6 KiB

// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
#pragma once
#include "rocksdb/statistics.h"
#include "util/histogram.h"
#include "util/mutexlock.h"
#define UNLIKELY(val) (__builtin_expect((val), 0))
namespace rocksdb {
class StatisticsImpl : public Statistics {
public:
StatisticsImpl();
virtual ~StatisticsImpl();
virtual long getTickerCount(Tickers tickerType);
virtual void setTickerCount(Tickers tickerType, uint64_t count);
virtual void recordTick(Tickers tickerType, uint64_t count);
virtual void measureTime(Histograms histogramType, uint64_t value);
virtual void histogramData(Histograms histogramType,
HistogramData* const data);
private:
std::atomic_uint_fast64_t tickers_[TICKER_ENUM_MAX];
HistogramImpl histograms_[HISTOGRAM_ENUM_MAX];
};
// Utility functions
inline void MeasureTime(Statistics* statistics, Histograms histogramType,
uint64_t value) {
if (statistics) {
statistics->measureTime(histogramType, value);
}
}
inline void RecordTick(Statistics* statistics, Tickers ticker,
uint64_t count = 1) {
if (statistics) {
statistics->recordTick(ticker, count);
}
}
inline void SetTickerCount(Statistics* statistics, Tickers ticker,
uint64_t count) {
if (statistics) {
statistics->setTickerCount(ticker, count);
}
}
}