ceph/src/jaegertracing/jaeger-client-cpp/src/jaegertracing/metrics/Gauge.h

   1 /*
   2  * Copyright (c) 2017 Uber Technologies, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef JAEGERTRACING_METRICS_GAUGE_H
  18 #define JAEGERTRACING_METRICS_GAUGE_H
  19
  20 #include "jaegertracing/Compilers.h"
  21
  22 #include <stdint.h>
  23
  24 namespace jaegertracing {
  25 namespace metrics {
  26
  27 class Gauge {
  28   public:
  29     virtual ~Gauge() = default;
  30
  31     virtual void update(int64_t amount) = 0;
  32 };
  33
  34 }  // namespace metrics
  35 }  // namespace jaegertracing
  36
  37 #endif  // JAEGERTRACING_METRICS_GAUGE_H