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51 lines
1.7 KiB
51 lines
1.7 KiB
// Copyright (c) 2016 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package atomic
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import "sync/atomic"
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// String is an atomic type-safe wrapper around atomic.Value for strings.
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type String struct{ v atomic.Value }
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// NewString creates a String.
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func NewString(str string) *String {
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s := &String{}
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if str != "" {
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s.Store(str)
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}
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return s
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}
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// Load atomically loads the wrapped string.
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func (s *String) Load() string {
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v := s.v.Load()
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if v == nil {
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return ""
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}
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return v.(string)
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}
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// Store atomically stores the passed string.
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// Note: Converting the string to an interface{} to store in the atomic.Value
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// requires an allocation.
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func (s *String) Store(str string) {
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s.v.Store(str)
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}
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