You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
2.3 KiB
72 lines
2.3 KiB
// @generated Code generated by gen-atomicwrapper. |
|
|
|
// Copyright (c) 2020-2023 Uber Technologies, Inc. |
|
// |
|
// Permission is hereby granted, free of charge, to any person obtaining a copy |
|
// of this software and associated documentation files (the "Software"), to deal |
|
// in the Software without restriction, including without limitation the rights |
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
|
// copies of the Software, and to permit persons to whom the Software is |
|
// furnished to do so, subject to the following conditions: |
|
// |
|
// The above copyright notice and this permission notice shall be included in |
|
// all copies or substantial portions of the Software. |
|
// |
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
|
// THE SOFTWARE. |
|
|
|
package atomic |
|
|
|
// String is an atomic type-safe wrapper for string values. |
|
type String struct { |
|
_ nocmp // disallow non-atomic comparison |
|
|
|
v Value |
|
} |
|
|
|
var _zeroString string |
|
|
|
// NewString creates a new String. |
|
func NewString(val string) *String { |
|
x := &String{} |
|
if val != _zeroString { |
|
x.Store(val) |
|
} |
|
return x |
|
} |
|
|
|
// Load atomically loads the wrapped string. |
|
func (x *String) Load() string { |
|
return unpackString(x.v.Load()) |
|
} |
|
|
|
// Store atomically stores the passed string. |
|
func (x *String) Store(val string) { |
|
x.v.Store(packString(val)) |
|
} |
|
|
|
// CompareAndSwap is an atomic compare-and-swap for string values. |
|
func (x *String) CompareAndSwap(old, new string) (swapped bool) { |
|
if x.v.CompareAndSwap(packString(old), packString(new)) { |
|
return true |
|
} |
|
|
|
if old == _zeroString { |
|
// If the old value is the empty value, then it's possible the |
|
// underlying Value hasn't been set and is nil, so retry with nil. |
|
return x.v.CompareAndSwap(nil, packString(new)) |
|
} |
|
|
|
return false |
|
} |
|
|
|
// Swap atomically stores the given string and returns the old |
|
// value. |
|
func (x *String) Swap(val string) (old string) { |
|
return unpackString(x.v.Swap(packString(val))) |
|
}
|
|
|