1 // Copyright 2023 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 15 #pragma once 16 #include "pw_bluetooth_sapphire/internal/host/common/inspect.h" 17 #include "pw_bluetooth_sapphire/internal/host/common/macros.h" 18 19 namespace bt { 20 21 // Represents a metric counter. 22 template <typename property_t> 23 class MetricCounter { 24 public: 25 MetricCounter() = default; 26 virtual ~MetricCounter() = default; 27 28 // Attach peer inspect node as a child node of |parent|. 29 virtual void AttachInspect(inspect::Node& parent, const std::string& name); 30 31 // Increment the metrics counter by |value|. 32 void Add(int value = 1) { inspect_property_.Add(value); } 33 34 // Decrement the metrics counter by |value|. 35 void Subtract(int value = 1) { inspect_property_.Subtract(value); } 36 37 private: 38 // Node property 39 property_t inspect_property_; 40 41 // Update underlying inspect attributes. 42 void UpdateInspect(); 43 44 BT_DISALLOW_COPY_AND_ASSIGN_ALLOW_MOVE(MetricCounter); 45 }; 46 47 using IntMetricCounter = MetricCounter<inspect::IntProperty>; 48 using UintMetricCounter = MetricCounter<inspect::UintProperty>; 49 50 } // namespace bt 51