1// @generated Code generated by gen-atomicint. 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 "strconv" 28 "sync/atomic" 29) 30 31// Uint64 is an atomic wrapper around uint64. 32type Uint64 struct { 33 _ nocmp // disallow non-atomic comparison 34 35 v uint64 36} 37 38// NewUint64 creates a new Uint64. 39func NewUint64(val uint64) *Uint64 { 40 return &Uint64{v: val} 41} 42 43// Load atomically loads the wrapped value. 44func (i *Uint64) Load() uint64 { 45 return atomic.LoadUint64(&i.v) 46} 47 48// Add atomically adds to the wrapped uint64 and returns the new value. 49func (i *Uint64) Add(delta uint64) uint64 { 50 return atomic.AddUint64(&i.v, delta) 51} 52 53// Sub atomically subtracts from the wrapped uint64 and returns the new value. 54func (i *Uint64) Sub(delta uint64) uint64 { 55 return atomic.AddUint64(&i.v, ^(delta - 1)) 56} 57 58// Inc atomically increments the wrapped uint64 and returns the new value. 59func (i *Uint64) Inc() uint64 { 60 return i.Add(1) 61} 62 63// Dec atomically decrements the wrapped uint64 and returns the new value. 64func (i *Uint64) Dec() uint64 { 65 return i.Sub(1) 66} 67 68// CAS is an atomic compare-and-swap. 69func (i *Uint64) CAS(old, new uint64) (swapped bool) { 70 return atomic.CompareAndSwapUint64(&i.v, old, new) 71} 72 73// Store atomically stores the passed value. 74func (i *Uint64) Store(val uint64) { 75 atomic.StoreUint64(&i.v, val) 76} 77 78// Swap atomically swaps the wrapped uint64 and returns the old value. 79func (i *Uint64) Swap(val uint64) (old uint64) { 80 return atomic.SwapUint64(&i.v, val) 81} 82 83// MarshalJSON encodes the wrapped uint64 into JSON. 84func (i *Uint64) MarshalJSON() ([]byte, error) { 85 return json.Marshal(i.Load()) 86} 87 88// UnmarshalJSON decodes JSON into the wrapped uint64. 89func (i *Uint64) UnmarshalJSON(b []byte) error { 90 var v uint64 91 if err := json.Unmarshal(b, &v); err != nil { 92 return err 93 } 94 i.Store(v) 95 return nil 96} 97 98// String encodes the wrapped value as a string. 99func (i *Uint64) String() string { 100 v := i.Load() 101 return strconv.FormatUint(uint64(v), 10) 102} 103