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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <map>
#include <memory>
#include <string>
#include <unordered_map>
#include <vector>
#include "tracing/tracing/proto/histogram.pb.h"
namespace catapult {
class RunningStatistics;
// This class continuously saves results from a performance tests.
// You can later convert the results to a proto and upload to a Catapult
// dashboard.
//
// This class provides a subset of the API in histogram.py and is meant to work
// exactly the same way.
class HistogramBuilder {
public:
HistogramBuilder(const std::string& name,
tracing::tracing::proto::UnitAndDirection unit);
~HistogramBuilder();
void set_description(const std::string& description) {
description_ = description;
}
void AddDiagnostic(const std::string& key,
tracing::tracing::proto::Diagnostic diagnostic);
void AddSample(double value);
void SetSummaryOptions(tracing::tracing::proto::SummaryOptions options);
std::unique_ptr<tracing::tracing::proto::Histogram> toProto() const;
private:
class Resampler;
std::unique_ptr<Resampler> resampler_;
std::unique_ptr<RunningStatistics> running_statistics_;
int max_num_sample_values_;
std::string name_;
std::string description_;
tracing::tracing::proto::SummaryOptions options_;
tracing::tracing::proto::UnitAndDirection unit_;
std::vector<double> sample_values_;
std::unordered_map<std::string, tracing::tracing::proto::Diagnostic>
diagnostics_;
int num_nans_;
};
// Returns the corresponding proto unit if a C++ unit test still uses the old
// unit strings (see docs/histogram-set-json-format.md for the spec). Note,
// any _biggerIsBetter or _smallerIsBetter suffixes will be ignored.
tracing::tracing::proto::Unit UnitFromJsonUnit(std::string unit);
} // namespace catapult
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