00001 /* 00002 * Copyright 2018 The Cartographer Authors 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 #ifndef CARTOGRAPHER_METRICS_COUNTER_H_ 00018 #define CARTOGRAPHER_METRICS_COUNTER_H_ 00019 00020 #include <map> 00021 #include <vector> 00022 00023 namespace cartographer { 00024 namespace metrics { 00025 00026 class Counter { 00027 public: 00028 // Counter instance that does nothing. Safe for use in static initializers. 00029 static Counter* Null(); 00030 00031 virtual ~Counter() = default; 00032 virtual void Increment() = 0; 00033 virtual void Increment(double by_value) = 0; 00034 }; 00035 00036 } // namespace metrics 00037 } // namespace cartographer 00038 00039 #endif // CARTOGRAPHER_METRICS_COUNTER_H_