float64: Generate with gen-atomicwrapper
Generate atomic.Float64 with gen-valuewrapper by wrapping atomic.Uint64, using math.Float64bits and math.Float64frombits to pack and unpack float64 to uint64.
This commit is contained in:
Abhinav Gupta
70
float64.go
70
float64.go
@@ -1,3 +1,5 @@
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// @generated Code generated by gen-atomicwrapper.
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// Copyright (c) 2020 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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@@ -23,70 +25,52 @@ package atomic
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import (
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"encoding/json"
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"math"
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"strconv"
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"sync/atomic"
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)
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// Float64 is an atomic wrapper around float64.
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// Float64 is an atomic type-safe wrapper for float64 values.
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type Float64 struct {
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nocmp // disallow non-atomic comparison
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v uint64
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v Uint64
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}
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// NewFloat64 creates a Float64.
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func NewFloat64(f float64) *Float64 {
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return &Float64{v: math.Float64bits(f)}
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}
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var _zeroFloat64 float64
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// Load atomically loads the wrapped value.
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func (f *Float64) Load() float64 {
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return math.Float64frombits(atomic.LoadUint64(&f.v))
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}
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// Store atomically stores the passed value.
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func (f *Float64) Store(s float64) {
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atomic.StoreUint64(&f.v, math.Float64bits(s))
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}
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// Add atomically adds to the wrapped float64 and returns the new value.
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func (f *Float64) Add(s float64) float64 {
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for {
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old := f.Load()
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new := old + s
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if f.CAS(old, new) {
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return new
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}
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// NewFloat64 creates a new Float64.
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func NewFloat64(v float64) *Float64 {
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x := &Float64{}
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if v != _zeroFloat64 {
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x.Store(v)
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}
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return x
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}
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// Sub atomically subtracts from the wrapped float64 and returns the new value.
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func (f *Float64) Sub(s float64) float64 {
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return f.Add(-s)
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// Load atomically loads the wrapped float64.
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func (x *Float64) Load() float64 {
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return math.Float64frombits(x.v.Load())
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}
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// CAS is an atomic compare-and-swap.
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func (f *Float64) CAS(old, new float64) bool {
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return atomic.CompareAndSwapUint64(&f.v, math.Float64bits(old), math.Float64bits(new))
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// Store atomically stores the passed float64.
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func (x *Float64) Store(v float64) {
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x.v.Store(math.Float64bits(v))
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}
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// CAS is an atomic compare-and-swap for float64 values.
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func (x *Float64) CAS(o, n float64) bool {
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return x.v.CAS(math.Float64bits(o), math.Float64bits(n))
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}
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// MarshalJSON encodes the wrapped float64 into JSON.
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func (f *Float64) MarshalJSON() ([]byte, error) {
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return json.Marshal(f.Load())
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func (x *Float64) MarshalJSON() ([]byte, error) {
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return json.Marshal(x.Load())
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}
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// UnmarshalJSON decodes JSON into the wrapped float64.
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func (f *Float64) UnmarshalJSON(b []byte) error {
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// UnmarshalJSON decodes a float64 from JSON.
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func (x *Float64) UnmarshalJSON(b []byte) error {
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var v float64
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if err := json.Unmarshal(b, &v); err != nil {
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return err
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}
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f.Store(v)
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x.Store(v)
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return nil
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}
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// String encodes the wrapped value as a string.
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func (f *Float64) String() string {
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// 'g' is the behavior for floats with %v.
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return strconv.FormatFloat(f.Load(), 'g', -1, 64)
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}
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47
float64_ext.go
Normal file
47
float64_ext.go
Normal file
@@ -0,0 +1,47 @@
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// Copyright (c) 2020 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package atomic
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import "strconv"
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//go:generate bin/gen-atomicwrapper -name=Float64 -type=float64 -wrapped=Uint64 -pack=math.Float64bits -unpack=math.Float64frombits -cas -json -imports math -file=float64.go
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// Add atomically adds to the wrapped float64 and returns the new value.
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func (f *Float64) Add(s float64) float64 {
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for {
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old := f.Load()
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new := old + s
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if f.CAS(old, new) {
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return new
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}
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}
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}
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// Sub atomically subtracts from the wrapped float64 and returns the new value.
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func (f *Float64) Sub(s float64) float64 {
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return f.Add(-s)
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}
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// String encodes the wrapped value as a string.
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func (f *Float64) String() string {
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// 'g' is the behavior for floats with %v.
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return strconv.FormatFloat(f.Load(), 'g', -1, 64)
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}
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