ceph/src/jaegertracing/opentelemetry-cpp/third_party/prometheus-cpp/core/include/prometheus/detail/time_window_quantiles.h

   1 #pragma once
   2
   3 #include <chrono>
   4 #include <cstddef>
   5 #include <vector>
   6
   7 #include "prometheus/detail/ckms_quantiles.h"  // IWYU pragma: export
   8 #include "prometheus/detail/core_export.h"
   9
  10 // IWYU pragma: private, include "prometheus/summary.h"
  11
  12 namespace prometheus {
  13 namespace detail {
  14
  15 class PROMETHEUS_CPP_CORE_EXPORT TimeWindowQuantiles {
  16   using Clock = std::chrono::steady_clock;
  17
  18  public:
  19   TimeWindowQuantiles(const std::vector<CKMSQuantiles::Quantile>& quantiles,
  20                       Clock::duration max_age_seconds, int age_buckets);
  21
  22   double get(double q) const;
  23   void insert(double value);
  24
  25  private:
  26   CKMSQuantiles& rotate() const;
  27
  28   const std::vector<CKMSQuantiles::Quantile>& quantiles_;
  29   mutable std::vector<CKMSQuantiles> ckms_quantiles_;
  30   mutable std::size_t current_bucket_;
  31
  32   mutable Clock::time_point last_rotation_;
  33   const Clock::duration rotation_interval_;
  34 };
  35
  36 }  // namespace detail
  37 }  // namespace prometheus