implemented event and req
This commit is contained in:
116
pkg/utils/atomic/internal/gen-atomicint/main.go
Normal file
116
pkg/utils/atomic/internal/gen-atomicint/main.go
Normal file
@@ -0,0 +1,116 @@
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// Copyright (c) 2020-2022 Uber Technologies, Inc.
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//
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// 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,
|
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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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// gen-atomicint generates an atomic wrapper around an integer type.
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//
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// gen-atomicint -name Int32 -wrapped int32 -file out.go
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//
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// The generated wrapper will use the functions in the sync/atomic package
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// named after the generated type.
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package main
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import (
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"bytes"
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"embed"
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"errors"
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"flag"
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"fmt"
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"go/format"
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"io"
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"log"
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"os"
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"text/template"
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"time"
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)
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func main() {
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log.SetFlags(0)
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if err := run(os.Args[1:]); err != nil {
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log.Fatalf("%+v", err)
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}
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}
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func run(args []string) error {
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var opts struct {
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Name string
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Wrapped string
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File string
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Unsigned bool
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}
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flag := flag.NewFlagSet("gen-atomicint", flag.ContinueOnError)
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flag.StringVar(&opts.Name, "name", "", "name of the generated type (e.g. Int32)")
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flag.StringVar(&opts.Wrapped, "wrapped", "", "name of the wrapped type (e.g. int32)")
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flag.StringVar(&opts.File, "file", "", "output file path (default: stdout)")
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flag.BoolVar(&opts.Unsigned, "unsigned", false, "whether the type is unsigned")
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if err := flag.Parse(args); err != nil {
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return err
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}
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if len(opts.Name) == 0 || len(opts.Wrapped) == 0 {
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return errors.New("flags -name and -wrapped are required")
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}
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var w io.Writer = os.Stdout
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if file := opts.File; len(file) > 0 {
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f, err := os.Create(file)
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if err != nil {
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return fmt.Errorf("create %q: %v", file, err)
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}
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defer f.Close()
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w = f
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}
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data := struct {
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Name string
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Wrapped string
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Unsigned bool
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ToYear int
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}{
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Name: opts.Name,
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Wrapped: opts.Wrapped,
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Unsigned: opts.Unsigned,
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ToYear: time.Now().Year(),
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}
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|
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var buff bytes.Buffer
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if err := _tmpl.ExecuteTemplate(&buff, "wrapper.tmpl", data); err != nil {
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return fmt.Errorf("render template: %v", err)
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}
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bs, err := format.Source(buff.Bytes())
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if err != nil {
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return fmt.Errorf("reformat source: %v", err)
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}
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io.WriteString(w, "// @generated Code generated by gen-atomicint.\n\n")
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_, err = w.Write(bs)
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return err
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}
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var (
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//go:embed *.tmpl
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_tmplFS embed.FS
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_tmpl = template.Must(template.New("atomicint").ParseFS(_tmplFS, "*.tmpl"))
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)
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117
pkg/utils/atomic/internal/gen-atomicint/wrapper.tmpl
Normal file
117
pkg/utils/atomic/internal/gen-atomicint/wrapper.tmpl
Normal file
@@ -0,0 +1,117 @@
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// Copyright (c) 2020-{{.ToYear}} Uber Technologies, Inc.
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//
|
||||
// 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
|
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// THE SOFTWARE.
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package atomic
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import (
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"encoding/json"
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"strconv"
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"sync/atomic"
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)
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// {{ .Name }} is an atomic wrapper around {{ .Wrapped }}.
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type {{ .Name }} struct {
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_ nocmp // disallow non-atomic comparison
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v {{ .Wrapped }}
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}
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|
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// New{{ .Name }} creates a new {{ .Name }}.
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func New{{ .Name }}(val {{ .Wrapped }}) *{{ .Name }} {
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return &{{ .Name }}{v: val}
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}
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// Load atomically loads the wrapped value.
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func (i *{{ .Name }}) Load() {{ .Wrapped }} {
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return atomic.Load{{ .Name }}(&i.v)
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}
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// Add atomically adds to the wrapped {{ .Wrapped }} and returns the new value.
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func (i *{{ .Name }}) Add(delta {{ .Wrapped }}) {{ .Wrapped }} {
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return atomic.Add{{ .Name }}(&i.v, delta)
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}
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|
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// Sub atomically subtracts from the wrapped {{ .Wrapped }} and returns the new value.
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func (i *{{ .Name }}) Sub(delta {{ .Wrapped }}) {{ .Wrapped }} {
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return atomic.Add{{ .Name }}(&i.v,
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{{- if .Unsigned -}}
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^(delta - 1)
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||||
{{- else -}}
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-delta
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||||
{{- end -}}
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||||
)
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}
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|
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// Inc atomically increments the wrapped {{ .Wrapped }} and returns the new value.
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func (i *{{ .Name }}) Inc() {{ .Wrapped }} {
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return i.Add(1)
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}
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||||
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// Dec atomically decrements the wrapped {{ .Wrapped }} and returns the new value.
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func (i *{{ .Name }}) Dec() {{ .Wrapped }} {
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||||
return i.Sub(1)
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}
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|
||||
// CAS is an atomic compare-and-swap.
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//
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||||
// Deprecated: Use CompareAndSwap.
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||||
func (i *{{ .Name }}) CAS(old, new {{ .Wrapped }}) (swapped bool) {
|
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return i.CompareAndSwap(old, new)
|
||||
}
|
||||
|
||||
// CompareAndSwap is an atomic compare-and-swap.
|
||||
func (i *{{ .Name }}) CompareAndSwap(old, new {{ .Wrapped }}) (swapped bool) {
|
||||
return atomic.CompareAndSwap{{ .Name }}(&i.v, old, new)
|
||||
}
|
||||
|
||||
// Store atomically stores the passed value.
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||||
func (i *{{ .Name }}) Store(val {{ .Wrapped }}) {
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||||
atomic.Store{{ .Name }}(&i.v, val)
|
||||
}
|
||||
|
||||
// Swap atomically swaps the wrapped {{ .Wrapped }} and returns the old value.
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||||
func (i *{{ .Name }}) Swap(val {{ .Wrapped }}) (old {{ .Wrapped }}) {
|
||||
return atomic.Swap{{ .Name }}(&i.v, val)
|
||||
}
|
||||
|
||||
// MarshalJSON encodes the wrapped {{ .Wrapped }} into JSON.
|
||||
func (i *{{ .Name }}) MarshalJSON() (by, er) {
|
||||
return json.Marshal(i.Load())
|
||||
}
|
||||
|
||||
// UnmarshalJSON decodes JSON into the wrapped {{ .Wrapped }}.
|
||||
func (i *{{ .Name }}) UnmarshalJSON(b by) er {
|
||||
var v {{ .Wrapped }}
|
||||
if err := json.Unmarshal(b, &v); err != nil {
|
||||
return err
|
||||
}
|
||||
i.Store(v)
|
||||
return nil
|
||||
}
|
||||
|
||||
// String encodes the wrapped value as a string.
|
||||
func (i *{{ .Name }}) String() string {
|
||||
v := i.Load()
|
||||
{{ if .Unsigned -}}
|
||||
return strconv.FormatUint(uint64(v), 10)
|
||||
{{- else -}}
|
||||
return strconv.FormatInt(int64(v), 10)
|
||||
{{- end }}
|
||||
}
|
||||
203
pkg/utils/atomic/internal/gen-atomicwrapper/main.go
Normal file
203
pkg/utils/atomic/internal/gen-atomicwrapper/main.go
Normal file
@@ -0,0 +1,203 @@
|
||||
// Copyright (c) 2020-2022 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.
|
||||
|
||||
// gen-atomicwrapper generates wrapper types around other atomic types.
|
||||
//
|
||||
// It supports plugging in functions which convert the value inside the atomic
|
||||
// type to the user-facing value. For example,
|
||||
//
|
||||
// Given, atomic.Value and the functions,
|
||||
//
|
||||
// func packString(string) enveloper{}
|
||||
// func unpackString(enveloper{}) string
|
||||
//
|
||||
// We can run the following command:
|
||||
//
|
||||
// gen-atomicwrapper -name String -wrapped Value \
|
||||
// -type string -pack fromString -unpack tostring
|
||||
//
|
||||
// This wil generate approximately,
|
||||
//
|
||||
// type String struct{ v Value }
|
||||
//
|
||||
// func (s *String) Load() string {
|
||||
// return unpackString(v.Load())
|
||||
// }
|
||||
//
|
||||
// func (s *String) Store(s string) {
|
||||
// return s.v.Store(packString(s))
|
||||
// }
|
||||
//
|
||||
// The packing/unpacking logic allows the stored value to be different from
|
||||
// the user-facing value.
|
||||
package main
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"embed"
|
||||
"errors"
|
||||
"flag"
|
||||
"fmt"
|
||||
"go/format"
|
||||
"io"
|
||||
"log"
|
||||
"os"
|
||||
"sort"
|
||||
"strings"
|
||||
"text/template"
|
||||
"time"
|
||||
)
|
||||
|
||||
func main() {
|
||||
log.SetFlags(0)
|
||||
if err := run(os.Args[1:]); err != nil {
|
||||
log.Fatalf("%+v", err)
|
||||
}
|
||||
}
|
||||
|
||||
type stringList []string
|
||||
|
||||
func (sl *stringList) String() string {
|
||||
return strings.Join(*sl, ",")
|
||||
}
|
||||
|
||||
func (sl *stringList) Set(s string) error {
|
||||
for _, i := range strings.Split(s, ",") {
|
||||
*sl = append(*sl, strings.TrimSpace(i))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func run(args []string) error {
|
||||
var opts struct {
|
||||
Name string
|
||||
Wrapped string
|
||||
Type string
|
||||
|
||||
Imports stringList
|
||||
Pack, Unpack string
|
||||
|
||||
CAS bool
|
||||
CompareAndSwap bool
|
||||
Swap bool
|
||||
JSON bool
|
||||
|
||||
File string
|
||||
ToYear int
|
||||
}
|
||||
|
||||
opts.ToYear = time.Now().Year()
|
||||
|
||||
fl := flag.NewFlagSet("gen-atomicwrapper", flag.ContinueOnError)
|
||||
|
||||
// Required flags
|
||||
fl.StringVar(&opts.Name, "name", "",
|
||||
"name of the generated type (e.g. Duration)")
|
||||
fl.StringVar(&opts.Wrapped, "wrapped", "",
|
||||
"name of the wrapped atomic (e.g. Int64)")
|
||||
fl.StringVar(&opts.Type, "type", "",
|
||||
"name of the type exposed by the atomic (e.g. time.Duration)")
|
||||
|
||||
// Optional flags
|
||||
fl.Var(&opts.Imports, "imports",
|
||||
"comma separated list of imports to add")
|
||||
fl.StringVar(&opts.Pack, "pack", "",
|
||||
"function to transform values with before storage")
|
||||
fl.StringVar(&opts.Unpack, "unpack", "",
|
||||
"function to reverse packing on loading")
|
||||
fl.StringVar(&opts.File, "file", "",
|
||||
"output file path (default: stdout)")
|
||||
|
||||
// Switches for individual methods. Underlying atomics must support
|
||||
// these.
|
||||
fl.BoolVar(&opts.CAS, "cas", false,
|
||||
"generate a deprecated `CAS(old, new) bool` method; requires -pack")
|
||||
fl.BoolVar(&opts.CompareAndSwap, "compareandswap", false,
|
||||
"generate a `CompareAndSwap(old, new) bool` method; requires -pack")
|
||||
fl.BoolVar(&opts.Swap, "swap", false,
|
||||
"generate a `Swap(new) old` method; requires -pack and -unpack")
|
||||
fl.BoolVar(&opts.JSON, "json", false,
|
||||
"generate `Marshal/UnmarshJSON` methods")
|
||||
|
||||
if err := fl.Parse(args); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if len(opts.Name) == 0 ||
|
||||
len(opts.Wrapped) == 0 ||
|
||||
len(opts.Type) == 0 ||
|
||||
len(opts.Pack) == 0 ||
|
||||
len(opts.Unpack) == 0 {
|
||||
return errors.New("flags -name, -wrapped, -pack, -unpack and -type are required")
|
||||
}
|
||||
|
||||
if opts.CAS {
|
||||
opts.CompareAndSwap = true
|
||||
}
|
||||
|
||||
var w io.Writer = os.Stdout
|
||||
if file := opts.File; len(file) > 0 {
|
||||
f, err := os.Create(file)
|
||||
if err != nil {
|
||||
return fmt.Errorf("create %q: %v", file, err)
|
||||
}
|
||||
defer f.Close()
|
||||
|
||||
w = f
|
||||
}
|
||||
|
||||
// Import encoding/json if needed.
|
||||
if opts.JSON {
|
||||
found := false
|
||||
for _, imp := range opts.Imports {
|
||||
if imp == "encoding/json" {
|
||||
found = true
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
if !found {
|
||||
opts.Imports = append(opts.Imports, "encoding/json")
|
||||
}
|
||||
}
|
||||
|
||||
sort.Strings(opts.Imports)
|
||||
|
||||
var buff bytes.Buffer
|
||||
if err := _tmpl.ExecuteTemplate(&buff, "wrapper.tmpl", opts); err != nil {
|
||||
return fmt.Errorf("render template: %v", err)
|
||||
}
|
||||
|
||||
bs, err := format.Source(buff.Bytes())
|
||||
if err != nil {
|
||||
return fmt.Errorf("reformat source: %v", err)
|
||||
}
|
||||
|
||||
io.WriteString(w, "// @generated Code generated by gen-atomicwrapper.\n\n")
|
||||
_, err = w.Write(bs)
|
||||
return err
|
||||
}
|
||||
|
||||
var (
|
||||
//go:embed *.tmpl
|
||||
_tmplFS embed.FS
|
||||
|
||||
_tmpl = template.Must(template.New("atomicwrapper").ParseFS(_tmplFS, "*.tmpl"))
|
||||
)
|
||||
120
pkg/utils/atomic/internal/gen-atomicwrapper/wrapper.tmpl
Normal file
120
pkg/utils/atomic/internal/gen-atomicwrapper/wrapper.tmpl
Normal file
@@ -0,0 +1,120 @@
|
||||
// Copyright (c) 2020-{{.ToYear}} 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
|
||||
|
||||
{{ with .Imports }}
|
||||
import (
|
||||
{{ range . -}}
|
||||
{{ printf "%q" . }}
|
||||
{{ end }}
|
||||
)
|
||||
{{ end }}
|
||||
|
||||
// {{ .Name }} is an atomic type-safe wrapper for {{ .Type }} values.
|
||||
type {{ .Name }} struct{
|
||||
_ nocmp // disallow non-atomic comparison
|
||||
|
||||
v {{ .Wrapped }}
|
||||
}
|
||||
|
||||
var _zero{{ .Name }} {{ .Type }}
|
||||
|
||||
|
||||
// New{{ .Name }} creates a new {{ .Name }}.
|
||||
func New{{ .Name }}(val {{ .Type }}) *{{ .Name }} {
|
||||
x := &{{ .Name }}{}
|
||||
if val != _zero{{ .Name }} {
|
||||
x.Store(val)
|
||||
}
|
||||
return x
|
||||
}
|
||||
|
||||
// Load atomically loads the wrapped {{ .Type }}.
|
||||
func (x *{{ .Name }}) Load() {{ .Type }} {
|
||||
{{ if .Unpack -}}
|
||||
return {{ .Unpack }}(x.v.Load())
|
||||
{{- else -}}
|
||||
if v := x.v.Load(); v != nil {
|
||||
return v.({{ .Type }})
|
||||
}
|
||||
return _zero{{ .Name }}
|
||||
{{- end }}
|
||||
}
|
||||
|
||||
// Store atomically stores the passed {{ .Type }}.
|
||||
func (x *{{ .Name }}) Store(val {{ .Type }}) {
|
||||
x.v.Store({{ .Pack }}(val))
|
||||
}
|
||||
|
||||
{{ if .CAS -}}
|
||||
// CAS is an atomic compare-and-swap for {{ .Type }} values.
|
||||
//
|
||||
// Deprecated: Use CompareAndSwap.
|
||||
func (x *{{ .Name }}) CAS(old, new {{ .Type }}) (swapped bool) {
|
||||
return x.CompareAndSwap(old, new)
|
||||
}
|
||||
{{- end }}
|
||||
|
||||
{{ if .CompareAndSwap -}}
|
||||
// CompareAndSwap is an atomic compare-and-swap for {{ .Type }} values.
|
||||
func (x *{{ .Name }}) CompareAndSwap(old, new {{ .Type }}) (swapped bool) {
|
||||
{{ if eq .Wrapped "Value" -}}
|
||||
if x.v.CompareAndSwap({{ .Pack }}(old), {{ .Pack }}(new)) {
|
||||
return true
|
||||
}
|
||||
|
||||
if old == _zero{{ .Name }} {
|
||||
// If the old value is the empty value, then it's possible the
|
||||
// underlying Value hasn't been set and is nil, so retry with nil.
|
||||
return x.v.CompareAndSwap(nil, {{ .Pack }}(new))
|
||||
}
|
||||
|
||||
return false
|
||||
{{- else -}}
|
||||
return x.v.CompareAndSwap({{ .Pack }}(old), {{ .Pack }}(new))
|
||||
{{- end }}
|
||||
}
|
||||
{{- end }}
|
||||
|
||||
{{ if .Swap -}}
|
||||
// Swap atomically stores the given {{ .Type }} and returns the old
|
||||
// value.
|
||||
func (x *{{ .Name }}) Swap(val {{ .Type }}) (old {{ .Type }}) {
|
||||
return {{ .Unpack }}(x.v.Swap({{ .Pack }}(val)))
|
||||
}
|
||||
{{- end }}
|
||||
|
||||
{{ if .JSON -}}
|
||||
// MarshalJSON encodes the wrapped {{ .Type }} into JSON.
|
||||
func (x *{{ .Name }}) MarshalJSON() (by, er) {
|
||||
return json.Marshal(x.Load())
|
||||
}
|
||||
|
||||
// UnmarshalJSON decodes a {{ .Type }} from JSON.
|
||||
func (x *{{ .Name }}) UnmarshalJSON(b by) er {
|
||||
var v {{ .Type }}
|
||||
if err := json.Unmarshal(b, &v); err != nil {
|
||||
return err
|
||||
}
|
||||
x.Store(v)
|
||||
return nil
|
||||
}
|
||||
{{- end }}
|
||||
Reference in New Issue
Block a user