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.
53 lines
1.7 KiB
53 lines
1.7 KiB
// Copyright (c) 2020 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 |
|
|
|
import ( |
|
"strconv" |
|
) |
|
|
|
//go:generate bin/gen-atomicwrapper -name=Bool -type=bool -wrapped=Uint32 -pack=boolToInt -unpack=truthy -cas -swap -json -file=bool.go |
|
|
|
func truthy(n uint32) bool { |
|
return n == 1 |
|
} |
|
|
|
func boolToInt(b bool) uint32 { |
|
if b { |
|
return 1 |
|
} |
|
return 0 |
|
} |
|
|
|
// Toggle atomically negates the Boolean and returns the previous value. |
|
func (b *Bool) Toggle() (old bool) { |
|
for { |
|
old := b.Load() |
|
if b.CAS(old, !old) { |
|
return old |
|
} |
|
} |
|
} |
|
|
|
// String encodes the wrapped value as a string. |
|
func (b *Bool) String() string { |
|
return strconv.FormatBool(b.Load()) |
|
}
|
|
|