blob: ede8136face10255bae082f9efca6b74d812134c [file] [log] [blame]
Takahiro Suzuki241c10e2020-12-17 20:17:57 +09001// 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
21package atomic
22
23// String is an atomic type-safe wrapper around Value for strings.
24type String struct{ v Value }
25
26// NewString creates a String.
27func 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.
36func (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.
47func (s *String) Store(str string) {
48 s.v.Store(str)
49}