| Matteo Scandolo | a428586 | 2020-12-01 18:10:10 -0800 | [diff] [blame] | 1 | // Copyright (c) 2017 Uber Technologies, Inc. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://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, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package metrics |
| 16 | |
| 17 | // Counter tracks the number of times an event has occurred |
| 18 | type Counter interface { |
| 19 | // Inc adds the given value to the counter. |
| 20 | Inc(int64) |
| 21 | } |
| 22 | |
| 23 | // NullCounter counter that does nothing |
| 24 | var NullCounter Counter = nullCounter{} |
| 25 | |
| 26 | type nullCounter struct{} |
| 27 | |
| 28 | func (nullCounter) Inc(int64) {} |