Program Listing for File meter.h

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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0

#pragma once

#include "opentelemetry/nostd/shared_ptr.h"
#include "opentelemetry/nostd/string_view.h"
#include "opentelemetry/nostd/unique_ptr.h"
#include "opentelemetry/version.h"

OPENTELEMETRY_BEGIN_NAMESPACE
namespace metrics
{

template <typename T>
class Counter;

template <typename T>
class Histogram;

template <typename T>
class UpDownCounter;

class ObservableInstrument;

class Meter
{
public:
  virtual ~Meter() = default;

  virtual nostd::unique_ptr<Counter<uint64_t>> CreateUInt64Counter(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;

  virtual nostd::unique_ptr<Counter<double>> CreateDoubleCounter(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;

  virtual nostd::shared_ptr<ObservableInstrument> CreateInt64ObservableCounter(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;

  virtual nostd::shared_ptr<ObservableInstrument> CreateDoubleObservableCounter(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;

  virtual nostd::unique_ptr<Histogram<uint64_t>> CreateUInt64Histogram(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;

  virtual nostd::unique_ptr<Histogram<double>> CreateDoubleHistogram(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;

  virtual nostd::shared_ptr<ObservableInstrument> CreateInt64ObservableGauge(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;

  virtual nostd::shared_ptr<ObservableInstrument> CreateDoubleObservableGauge(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;

  virtual nostd::unique_ptr<UpDownCounter<int64_t>> CreateInt64UpDownCounter(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;

  virtual nostd::unique_ptr<UpDownCounter<double>> CreateDoubleUpDownCounter(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;

  virtual nostd::shared_ptr<ObservableInstrument> CreateInt64ObservableUpDownCounter(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;

  virtual nostd::shared_ptr<ObservableInstrument> CreateDoubleObservableUpDownCounter(
      nostd::string_view name,
      nostd::string_view description = "",
      nostd::string_view unit        = "") noexcept = 0;
};
}  // namespace metrics
OPENTELEMETRY_END_NAMESPACE