blob: 927b1add74e51ffed8a0265ced6b24a72d95aaff [file] [log] [blame]
Girish Gowdra390f12f2021-07-01 15:53:49 -07001// Copyright (c) 2020 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
23import "strconv"
24
25//go:generate bin/gen-atomicwrapper -name=Float64 -type=float64 -wrapped=Uint64 -pack=math.Float64bits -unpack=math.Float64frombits -cas -json -imports math -file=float64.go
26
27// Add atomically adds to the wrapped float64 and returns the new value.
28func (f *Float64) Add(s float64) float64 {
29 for {
30 old := f.Load()
31 new := old + s
32 if f.CAS(old, new) {
33 return new
34 }
35 }
36}
37
38// Sub atomically subtracts from the wrapped float64 and returns the new value.
39func (f *Float64) Sub(s float64) float64 {
40 return f.Add(-s)
41}
42
43// String encodes the wrapped value as a string.
44func (f *Float64) String() string {
45 // 'g' is the behavior for floats with %v.
46 return strconv.FormatFloat(f.Load(), 'g', -1, 64)
47}