1// @generated Code generated by gen-atomicwrapper.
2
3// Copyright (c) 2020 Uber Technologies, Inc.
4//
5// Permission is hereby granted, free of charge, to any person obtaining a copy
6// of this software and associated documentation files (the "Software"), to deal
7// in the Software without restriction, including without limitation the rights
8// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9// copies of the Software, and to permit persons to whom the Software is
10// furnished to do so, subject to the following conditions:
11//
12// The above copyright notice and this permission notice shall be included in
13// all copies or substantial portions of the Software.
14//
15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21// THE SOFTWARE.
22
23package atomic
24
25import (
26	"encoding/json"
27	"math"
28)
29
30// Float64 is an atomic type-safe wrapper for float64 values.
31type Float64 struct {
32	_ nocmp // disallow non-atomic comparison
33
34	v Uint64
35}
36
37var _zeroFloat64 float64
38
39// NewFloat64 creates a new Float64.
40func NewFloat64(v float64) *Float64 {
41	x := &Float64{}
42	if v != _zeroFloat64 {
43		x.Store(v)
44	}
45	return x
46}
47
48// Load atomically loads the wrapped float64.
49func (x *Float64) Load() float64 {
50	return math.Float64frombits(x.v.Load())
51}
52
53// Store atomically stores the passed float64.
54func (x *Float64) Store(v float64) {
55	x.v.Store(math.Float64bits(v))
56}
57
58// CAS is an atomic compare-and-swap for float64 values.
59func (x *Float64) CAS(o, n float64) bool {
60	return x.v.CAS(math.Float64bits(o), math.Float64bits(n))
61}
62
63// MarshalJSON encodes the wrapped float64 into JSON.
64func (x *Float64) MarshalJSON() ([]byte, error) {
65	return json.Marshal(x.Load())
66}
67
68// UnmarshalJSON decodes a float64 from JSON.
69func (x *Float64) UnmarshalJSON(b []byte) error {
70	var v float64
71	if err := json.Unmarshal(b, &v); err != nil {
72		return err
73	}
74	x.Store(v)
75	return nil
76}
77