logger.hpp

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// Copyright 2017 Open Source Robotics Foundation, Inc.
//
// 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 RCLCPP__LOGGER_HPP_
#define RCLCPP__LOGGER_HPP_
 
#include <memory>
#include <string>
 
#include "rclcpp/visibility_control.hpp"
 
#include "rcl/node.h"
 
// TODO(dhood): determine this automatically from `RCLCPP_LOG_MIN_SEVERITY`
#ifndef RCLCPP_LOGGING_ENABLED
#define RCLCPP_LOGGING_ENABLED 1
#endif
 
namespace rclcpp
{
 
// Forward declaration is used for friend statement.
namespace node_interfaces
{
class NodeLogging;
}
 
class Logger;
 
 
RCLCPP_PUBLIC
Logger
get_logger(const std::string & name);
 
 
RCLCPP_PUBLIC
Logger
get_node_logger(const rcl_node_t * node);
 
class Logger
{
private:
  friend Logger rclcpp::get_logger(const std::string & name);
  friend ::rclcpp::node_interfaces::NodeLogging;
 
 
  Logger()
  : name_(nullptr) {}
 
 
  explicit Logger(const std::string & name)
  : name_(new std::string(name)) {}
 
  std::shared_ptr<const std::string> name_;
 
public:
  RCLCPP_PUBLIC
  Logger(const Logger &) = default;
 
 
  RCLCPP_PUBLIC
  const char *
  get_name() const
  {
    if (!name_) {
      return nullptr;
    }
    return name_->c_str();
  }
 
 
  RCLCPP_PUBLIC
  Logger
  get_child(const std::string & suffix)
  {
    if (!name_) {
      return Logger();
    }
    return Logger(*name_ + "." + suffix);
  }
};
 
}  // namespace rclcpp
 
#endif  // RCLCPP__LOGGER_HPP_