1 // @generated Code generated by gen-atomicwrapper. 2 3 // Copyright (c) 2020-2023 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 23 package atomic 24 25 import ( 26 "encoding/json" 27 "math" 28 ) 29 30 // Float64 is an atomic type-safe wrapper for float64 values. 31 type Float64 struct { 32 _ nocmp // disallow non-atomic comparison 33 34 v Uint64 35 } 36 37 var _zeroFloat64 float64 38 39 // NewFloat64 creates a new Float64. 40 func NewFloat64(val float64) *Float64 { 41 x := &Float64{} 42 if val != _zeroFloat64 { 43 x.Store(val) 44 } 45 return x 46 } 47 48 // Load atomically loads the wrapped float64. 49 func (x *Float64) Load() float64 { 50 return math.Float64frombits(x.v.Load()) 51 } 52 53 // Store atomically stores the passed float64. 54 func (x *Float64) Store(val float64) { 55 x.v.Store(math.Float64bits(val)) 56 } 57 58 // Swap atomically stores the given float64 and returns the old 59 // value. 60 func (x *Float64) Swap(val float64) (old float64) { 61 return math.Float64frombits(x.v.Swap(math.Float64bits(val))) 62 } 63 64 // MarshalJSON encodes the wrapped float64 into JSON. 65 func (x *Float64) MarshalJSON() ([]byte, error) { 66 return json.Marshal(x.Load()) 67 } 68 69 // UnmarshalJSON decodes a float64 from JSON. 70 func (x *Float64) UnmarshalJSON(b []byte) error { 71 var v float64 72 if err := json.Unmarshal(b, &v); err != nil { 73 return err 74 } 75 x.Store(v) 76 return nil 77 } 78