mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-11-22 20:40:27 +00:00
352 lines
9.2 KiB
Go
352 lines
9.2 KiB
Go
// Copyright (c) 2016 Uber Technologies, Inc.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
|
|
// Package atomic provides simple wrappers around numerics to enforce atomic
|
|
// access.
|
|
package atomic
|
|
|
|
import (
|
|
"math"
|
|
"sync/atomic"
|
|
"time"
|
|
)
|
|
|
|
// Int32 is an atomic wrapper around an int32.
|
|
type Int32 struct{ v int32 }
|
|
|
|
// NewInt32 creates an Int32.
|
|
func NewInt32(i int32) *Int32 {
|
|
return &Int32{i}
|
|
}
|
|
|
|
// Load atomically loads the wrapped value.
|
|
func (i *Int32) Load() int32 {
|
|
return atomic.LoadInt32(&i.v)
|
|
}
|
|
|
|
// Add atomically adds to the wrapped int32 and returns the new value.
|
|
func (i *Int32) Add(n int32) int32 {
|
|
return atomic.AddInt32(&i.v, n)
|
|
}
|
|
|
|
// Sub atomically subtracts from the wrapped int32 and returns the new value.
|
|
func (i *Int32) Sub(n int32) int32 {
|
|
return atomic.AddInt32(&i.v, -n)
|
|
}
|
|
|
|
// Inc atomically increments the wrapped int32 and returns the new value.
|
|
func (i *Int32) Inc() int32 {
|
|
return i.Add(1)
|
|
}
|
|
|
|
// Dec atomically decrements the wrapped int32 and returns the new value.
|
|
func (i *Int32) Dec() int32 {
|
|
return i.Sub(1)
|
|
}
|
|
|
|
// CAS is an atomic compare-and-swap.
|
|
func (i *Int32) CAS(old, new int32) bool {
|
|
return atomic.CompareAndSwapInt32(&i.v, old, new)
|
|
}
|
|
|
|
// Store atomically stores the passed value.
|
|
func (i *Int32) Store(n int32) {
|
|
atomic.StoreInt32(&i.v, n)
|
|
}
|
|
|
|
// Swap atomically swaps the wrapped int32 and returns the old value.
|
|
func (i *Int32) Swap(n int32) int32 {
|
|
return atomic.SwapInt32(&i.v, n)
|
|
}
|
|
|
|
// Int64 is an atomic wrapper around an int64.
|
|
type Int64 struct{ v int64 }
|
|
|
|
// NewInt64 creates an Int64.
|
|
func NewInt64(i int64) *Int64 {
|
|
return &Int64{i}
|
|
}
|
|
|
|
// Load atomically loads the wrapped value.
|
|
func (i *Int64) Load() int64 {
|
|
return atomic.LoadInt64(&i.v)
|
|
}
|
|
|
|
// Add atomically adds to the wrapped int64 and returns the new value.
|
|
func (i *Int64) Add(n int64) int64 {
|
|
return atomic.AddInt64(&i.v, n)
|
|
}
|
|
|
|
// Sub atomically subtracts from the wrapped int64 and returns the new value.
|
|
func (i *Int64) Sub(n int64) int64 {
|
|
return atomic.AddInt64(&i.v, -n)
|
|
}
|
|
|
|
// Inc atomically increments the wrapped int64 and returns the new value.
|
|
func (i *Int64) Inc() int64 {
|
|
return i.Add(1)
|
|
}
|
|
|
|
// Dec atomically decrements the wrapped int64 and returns the new value.
|
|
func (i *Int64) Dec() int64 {
|
|
return i.Sub(1)
|
|
}
|
|
|
|
// CAS is an atomic compare-and-swap.
|
|
func (i *Int64) CAS(old, new int64) bool {
|
|
return atomic.CompareAndSwapInt64(&i.v, old, new)
|
|
}
|
|
|
|
// Store atomically stores the passed value.
|
|
func (i *Int64) Store(n int64) {
|
|
atomic.StoreInt64(&i.v, n)
|
|
}
|
|
|
|
// Swap atomically swaps the wrapped int64 and returns the old value.
|
|
func (i *Int64) Swap(n int64) int64 {
|
|
return atomic.SwapInt64(&i.v, n)
|
|
}
|
|
|
|
// Uint32 is an atomic wrapper around an uint32.
|
|
type Uint32 struct{ v uint32 }
|
|
|
|
// NewUint32 creates a Uint32.
|
|
func NewUint32(i uint32) *Uint32 {
|
|
return &Uint32{i}
|
|
}
|
|
|
|
// Load atomically loads the wrapped value.
|
|
func (i *Uint32) Load() uint32 {
|
|
return atomic.LoadUint32(&i.v)
|
|
}
|
|
|
|
// Add atomically adds to the wrapped uint32 and returns the new value.
|
|
func (i *Uint32) Add(n uint32) uint32 {
|
|
return atomic.AddUint32(&i.v, n)
|
|
}
|
|
|
|
// Sub atomically subtracts from the wrapped uint32 and returns the new value.
|
|
func (i *Uint32) Sub(n uint32) uint32 {
|
|
return atomic.AddUint32(&i.v, ^(n - 1))
|
|
}
|
|
|
|
// Inc atomically increments the wrapped uint32 and returns the new value.
|
|
func (i *Uint32) Inc() uint32 {
|
|
return i.Add(1)
|
|
}
|
|
|
|
// Dec atomically decrements the wrapped int32 and returns the new value.
|
|
func (i *Uint32) Dec() uint32 {
|
|
return i.Sub(1)
|
|
}
|
|
|
|
// CAS is an atomic compare-and-swap.
|
|
func (i *Uint32) CAS(old, new uint32) bool {
|
|
return atomic.CompareAndSwapUint32(&i.v, old, new)
|
|
}
|
|
|
|
// Store atomically stores the passed value.
|
|
func (i *Uint32) Store(n uint32) {
|
|
atomic.StoreUint32(&i.v, n)
|
|
}
|
|
|
|
// Swap atomically swaps the wrapped uint32 and returns the old value.
|
|
func (i *Uint32) Swap(n uint32) uint32 {
|
|
return atomic.SwapUint32(&i.v, n)
|
|
}
|
|
|
|
// Uint64 is an atomic wrapper around a uint64.
|
|
type Uint64 struct{ v uint64 }
|
|
|
|
// NewUint64 creates a Uint64.
|
|
func NewUint64(i uint64) *Uint64 {
|
|
return &Uint64{i}
|
|
}
|
|
|
|
// Load atomically loads the wrapped value.
|
|
func (i *Uint64) Load() uint64 {
|
|
return atomic.LoadUint64(&i.v)
|
|
}
|
|
|
|
// Add atomically adds to the wrapped uint64 and returns the new value.
|
|
func (i *Uint64) Add(n uint64) uint64 {
|
|
return atomic.AddUint64(&i.v, n)
|
|
}
|
|
|
|
// Sub atomically subtracts from the wrapped uint64 and returns the new value.
|
|
func (i *Uint64) Sub(n uint64) uint64 {
|
|
return atomic.AddUint64(&i.v, ^(n - 1))
|
|
}
|
|
|
|
// Inc atomically increments the wrapped uint64 and returns the new value.
|
|
func (i *Uint64) Inc() uint64 {
|
|
return i.Add(1)
|
|
}
|
|
|
|
// Dec atomically decrements the wrapped uint64 and returns the new value.
|
|
func (i *Uint64) Dec() uint64 {
|
|
return i.Sub(1)
|
|
}
|
|
|
|
// CAS is an atomic compare-and-swap.
|
|
func (i *Uint64) CAS(old, new uint64) bool {
|
|
return atomic.CompareAndSwapUint64(&i.v, old, new)
|
|
}
|
|
|
|
// Store atomically stores the passed value.
|
|
func (i *Uint64) Store(n uint64) {
|
|
atomic.StoreUint64(&i.v, n)
|
|
}
|
|
|
|
// Swap atomically swaps the wrapped uint64 and returns the old value.
|
|
func (i *Uint64) Swap(n uint64) uint64 {
|
|
return atomic.SwapUint64(&i.v, n)
|
|
}
|
|
|
|
// Bool is an atomic Boolean.
|
|
type Bool struct{ v uint32 }
|
|
|
|
// NewBool creates a Bool.
|
|
func NewBool(initial bool) *Bool {
|
|
return &Bool{boolToInt(initial)}
|
|
}
|
|
|
|
// Load atomically loads the Boolean.
|
|
func (b *Bool) Load() bool {
|
|
return truthy(atomic.LoadUint32(&b.v))
|
|
}
|
|
|
|
// CAS is an atomic compare-and-swap.
|
|
func (b *Bool) CAS(old, new bool) bool {
|
|
return atomic.CompareAndSwapUint32(&b.v, boolToInt(old), boolToInt(new))
|
|
}
|
|
|
|
// Store atomically stores the passed value.
|
|
func (b *Bool) Store(new bool) {
|
|
atomic.StoreUint32(&b.v, boolToInt(new))
|
|
}
|
|
|
|
// Swap sets the given value and returns the previous value.
|
|
func (b *Bool) Swap(new bool) bool {
|
|
return truthy(atomic.SwapUint32(&b.v, boolToInt(new)))
|
|
}
|
|
|
|
// Toggle atomically negates the Boolean and returns the previous value.
|
|
func (b *Bool) Toggle() bool {
|
|
return truthy(atomic.AddUint32(&b.v, 1) - 1)
|
|
}
|
|
|
|
func truthy(n uint32) bool {
|
|
return n&1 == 1
|
|
}
|
|
|
|
func boolToInt(b bool) uint32 {
|
|
if b {
|
|
return 1
|
|
}
|
|
return 0
|
|
}
|
|
|
|
// Float64 is an atomic wrapper around float64.
|
|
type Float64 struct {
|
|
v uint64
|
|
}
|
|
|
|
// NewFloat64 creates a Float64.
|
|
func NewFloat64(f float64) *Float64 {
|
|
return &Float64{math.Float64bits(f)}
|
|
}
|
|
|
|
// Load atomically loads the wrapped value.
|
|
func (f *Float64) Load() float64 {
|
|
return math.Float64frombits(atomic.LoadUint64(&f.v))
|
|
}
|
|
|
|
// Store atomically stores the passed value.
|
|
func (f *Float64) Store(s float64) {
|
|
atomic.StoreUint64(&f.v, math.Float64bits(s))
|
|
}
|
|
|
|
// Add atomically adds to the wrapped float64 and returns the new value.
|
|
func (f *Float64) Add(s float64) float64 {
|
|
for {
|
|
old := f.Load()
|
|
new := old + s
|
|
if f.CAS(old, new) {
|
|
return new
|
|
}
|
|
}
|
|
}
|
|
|
|
// Sub atomically subtracts from the wrapped float64 and returns the new value.
|
|
func (f *Float64) Sub(s float64) float64 {
|
|
return f.Add(-s)
|
|
}
|
|
|
|
// CAS is an atomic compare-and-swap.
|
|
func (f *Float64) CAS(old, new float64) bool {
|
|
return atomic.CompareAndSwapUint64(&f.v, math.Float64bits(old), math.Float64bits(new))
|
|
}
|
|
|
|
// Duration is an atomic wrapper around time.Duration
|
|
// https://godoc.org/time#Duration
|
|
type Duration struct {
|
|
v Int64
|
|
}
|
|
|
|
// NewDuration creates a Duration.
|
|
func NewDuration(d time.Duration) *Duration {
|
|
return &Duration{v: *NewInt64(int64(d))}
|
|
}
|
|
|
|
// Load atomically loads the wrapped value.
|
|
func (d *Duration) Load() time.Duration {
|
|
return time.Duration(d.v.Load())
|
|
}
|
|
|
|
// Store atomically stores the passed value.
|
|
func (d *Duration) Store(n time.Duration) {
|
|
d.v.Store(int64(n))
|
|
}
|
|
|
|
// Add atomically adds to the wrapped time.Duration and returns the new value.
|
|
func (d *Duration) Add(n time.Duration) time.Duration {
|
|
return time.Duration(d.v.Add(int64(n)))
|
|
}
|
|
|
|
// Sub atomically subtracts from the wrapped time.Duration and returns the new value.
|
|
func (d *Duration) Sub(n time.Duration) time.Duration {
|
|
return time.Duration(d.v.Sub(int64(n)))
|
|
}
|
|
|
|
// Swap atomically swaps the wrapped time.Duration and returns the old value.
|
|
func (d *Duration) Swap(n time.Duration) time.Duration {
|
|
return time.Duration(d.v.Swap(int64(n)))
|
|
}
|
|
|
|
// CAS is an atomic compare-and-swap.
|
|
func (d *Duration) CAS(old, new time.Duration) bool {
|
|
return d.v.CAS(int64(old), int64(new))
|
|
}
|
|
|
|
// Value shadows the type of the same name from sync/atomic
|
|
// https://godoc.org/sync/atomic#Value
|
|
type Value struct{ atomic.Value }
|