Takahiro Suzuki | 241c10e | 2020-12-17 20:17:57 +0900 | [diff] [blame^] | 1 | // Copyright (c) 2016 Uber Technologies, Inc. |
| 2 | // |
| 3 | // Permission is hereby granted, free of charge, to any person obtaining a copy |
| 4 | // of this software and associated documentation files (the "Software"), to deal |
| 5 | // in the Software without restriction, including without limitation the rights |
| 6 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 7 | // copies of the Software, and to permit persons to whom the Software is |
| 8 | // furnished to do so, subject to the following conditions: |
| 9 | // |
| 10 | // The above copyright notice and this permission notice shall be included in |
| 11 | // all copies or substantial portions of the Software. |
| 12 | // |
| 13 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 14 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 15 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 16 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 17 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 18 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 19 | // THE SOFTWARE. |
| 20 | |
| 21 | package atomic |
| 22 | |
| 23 | // String is an atomic type-safe wrapper around Value for strings. |
| 24 | type String struct{ v Value } |
| 25 | |
| 26 | // NewString creates a String. |
| 27 | func NewString(str string) *String { |
| 28 | s := &String{} |
| 29 | if str != "" { |
| 30 | s.Store(str) |
| 31 | } |
| 32 | return s |
| 33 | } |
| 34 | |
| 35 | // Load atomically loads the wrapped string. |
| 36 | func (s *String) Load() string { |
| 37 | v := s.v.Load() |
| 38 | if v == nil { |
| 39 | return "" |
| 40 | } |
| 41 | return v.(string) |
| 42 | } |
| 43 | |
| 44 | // Store atomically stores the passed string. |
| 45 | // Note: Converting the string to an interface{} to store in the Value |
| 46 | // requires an allocation. |
| 47 | func (s *String) Store(str string) { |
| 48 | s.v.Store(str) |
| 49 | } |