Program Listing for File gauge.h
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/*
* Copyright 2018 The Cartographer Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef CARTOGRAPHER_ROS_METRICS_INTERNAL_GAUGE_H
#define CARTOGRAPHER_ROS_METRICS_INTERNAL_GAUGE_H
#include <map>
#include <string>
#include "absl/synchronization/mutex.h"
#include "cartographer/metrics/gauge.h"
#include "cartographer_ros_msgs/msg/metric.hpp"
namespace cartographer_ros {
namespace metrics {
class Gauge : public ::cartographer::metrics::Gauge {
public:
explicit Gauge(const std::map<std::string, std::string>& labels)
: labels_(labels), value_(0.) {}
void Decrement(const double value) override { Add(-1. * value); }
void Decrement() override { Decrement(1.); }
void Increment(const double value) override { Add(value); }
void Increment() override { Increment(1.); }
void Set(double value) override {
absl::MutexLock lock(&mutex_);
value_ = value;
}
double Value() {
absl::MutexLock lock(&mutex_);
return value_;
}
cartographer_ros_msgs::msg::Metric ToRosMessage() {
cartographer_ros_msgs::msg::Metric msg;
msg.type = cartographer_ros_msgs::msg::Metric::TYPE_GAUGE;
for (const auto& label : labels_) {
cartographer_ros_msgs::msg::MetricLabel label_msg;
label_msg.key = label.first;
label_msg.value = label.second;
msg.labels.push_back(label_msg);
}
msg.value = Value();
return msg;
}
private:
void Add(const double value) {
absl::MutexLock lock(&mutex_);
value_ += value;
}
absl::Mutex mutex_;
const std::map<std::string, std::string> labels_;
double value_ GUARDED_BY(mutex_);
};
} // namespace metrics
} // namespace cartographer_ros
#endif // CARTOGRAPHER_ROS_METRICS_INTERNAL_GAUGE_H