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// Copyright 2018 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.
#ifndef QUICHE_COMMON_PLATFORM_API_QUICHE_SERVER_STATS_H_
#define QUICHE_COMMON_PLATFORM_API_QUICHE_SERVER_STATS_H_
#include "quiche_platform_impl/quiche_server_stats_impl.h"
namespace quiche {
//------------------------------------------------------------------------------
// Enumeration histograms.
//
// Sample usage:
// // In Chrome, these values are persisted to logs. Entries should not be
// // renumbered and numeric values should never be reused.
// enum class MyEnum {
// FIRST_VALUE = 0,
// SECOND_VALUE = 1,
// ...
// FINAL_VALUE = N,
// COUNT
// };
// QUICHE_SERVER_HISTOGRAM_ENUM("My.Enumeration", MyEnum::SOME_VALUE,
// MyEnum::COUNT, "Number of time $foo equals to some enum value");
//
// Note: The value in |sample| must be strictly less than |enum_size|.
#define QUICHE_SERVER_HISTOGRAM_ENUM(name, sample, enum_size, docstring) \
QUICHE_SERVER_HISTOGRAM_ENUM_IMPL(name, sample, enum_size, docstring)
//------------------------------------------------------------------------------
// Histogram for boolean values.
// Sample usage:
// QUICHE_SERVER_HISTOGRAM_BOOL("My.Boolean", bool,
// "Number of times $foo is true or false");
#define QUICHE_SERVER_HISTOGRAM_BOOL(name, sample, docstring) \
QUICHE_SERVER_HISTOGRAM_BOOL_IMPL(name, sample, docstring)
//------------------------------------------------------------------------------
// Timing histograms. These are used for collecting timing data (generally
// latencies).
// These macros create exponentially sized histograms (lengths of the bucket
// ranges exponentially increase as the sample range increases). The units for
// sample and max are unspecified, but they must be the same for one histogram.
// Sample usage:
// QUICHE_SERVER_HISTOGRAM_TIMES("Very.Long.Timing.Histogram", time_delta,
// QuicTime::Delta::FromSeconds(1), QuicTime::Delta::FromSecond(3600 *
// 24), 100, "Time spent in doing operation.");
#define QUICHE_SERVER_HISTOGRAM_TIMES(name, sample, min, max, bucket_count, \
docstring) \
QUICHE_SERVER_HISTOGRAM_TIMES_IMPL(name, sample, min, max, bucket_count, \
docstring)
//------------------------------------------------------------------------------
// Count histograms. These are used for collecting numeric data.
// These macros default to exponential histograms - i.e. the lengths of the
// bucket ranges exponentially increase as the sample range increases.
// All of these macros must be called with |name| as a runtime constant.
// Any data outside the range here will be put in underflow and overflow
// buckets. Min values should be >=1 as emitted 0s will still go into the
// underflow bucket.
// Sample usage:
// QUICHE_SERVER_SERVER_HISTOGRAM_CUSTOM_COUNTS("My.Histogram", 1, 100000000,
// 100, "Counters of hitting certian code.");
#define QUICHE_SERVER_HISTOGRAM_COUNTS(name, sample, min, max, bucket_count, \
docstring) \
QUICHE_SERVER_HISTOGRAM_COUNTS_IMPL(name, sample, min, max, bucket_count, \
docstring)
} // namespace quiche
#endif // QUICHE_COMMON_PLATFORM_API_QUICHE_SERVER_STATS_H_