1// @generated Code generated by gen-atomicwrapper. 2 3// Copyright (c) 2020-2021 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) 28 29// Bool is an atomic type-safe wrapper for bool values. 30type Bool struct { 31 _ nocmp // disallow non-atomic comparison 32 33 v Uint32 34} 35 36var _zeroBool bool 37 38// NewBool creates a new Bool. 39func NewBool(val bool) *Bool { 40 x := &Bool{} 41 if val != _zeroBool { 42 x.Store(val) 43 } 44 return x 45} 46 47// Load atomically loads the wrapped bool. 48func (x *Bool) Load() bool { 49 return truthy(x.v.Load()) 50} 51 52// Store atomically stores the passed bool. 53func (x *Bool) Store(val bool) { 54 x.v.Store(boolToInt(val)) 55} 56 57// CAS is an atomic compare-and-swap for bool values. 58func (x *Bool) CAS(old, new bool) (swapped bool) { 59 return x.v.CAS(boolToInt(old), boolToInt(new)) 60} 61 62// Swap atomically stores the given bool and returns the old 63// value. 64func (x *Bool) Swap(val bool) (old bool) { 65 return truthy(x.v.Swap(boolToInt(val))) 66} 67 68// MarshalJSON encodes the wrapped bool into JSON. 69func (x *Bool) MarshalJSON() ([]byte, error) { 70 return json.Marshal(x.Load()) 71} 72 73// UnmarshalJSON decodes a bool from JSON. 74func (x *Bool) UnmarshalJSON(b []byte) error { 75 var v bool 76 if err := json.Unmarshal(b, &v); err != nil { 77 return err 78 } 79 x.Store(v) 80 return nil 81} 82