bug fix

circle.go

@@ -4,7 +4,10 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"os"
+	"runtime"
 	"sync"
+	"sync/atomic"
 	"time"
 )
 
@@ -13,79 +16,90 @@ type StarBuffer struct {
 	io.Writer
 	io.Closer
 	datas   []byte
-	pStart  int
-	pEnd    int
-	cap     int
-	isClose bool
-	isEnd   bool
+	pStart  uint64
+	pEnd    uint64
+	cap     uint64
+	isClose atomic.Value
+	isEnd   atomic.Value
 	rmu     sync.Mutex
 	wmu     sync.Mutex
 }
 
-func NewStarBuffer(cap int) *StarBuffer {
+func NewStarBuffer(cap uint64) *StarBuffer {
 	rtnBuffer := new(StarBuffer)
 	rtnBuffer.cap = cap
 	rtnBuffer.datas = make([]byte, cap)
+	rtnBuffer.isClose.Store(false)
+	rtnBuffer.isEnd.Store(false)
 	return rtnBuffer
 }
 
-func (star *StarBuffer) Free() int {
+func (star *StarBuffer) Free() uint64 {
 	return star.cap - star.Len()
 }
 
-func (star *StarBuffer) Cap() int {
+func (star *StarBuffer) Cap() uint64 {
 	return star.cap
 }
 
-func (star *StarBuffer) Len() int {
-	length := star.pEnd - star.pStart
-	if length < 0 {
-		return star.cap + length - 1
+func (star *StarBuffer) Len() uint64 {
+	if star.pEnd >= star.pStart {
+		return star.pEnd - star.pStart
 	}
-	return length
+	return star.pEnd - star.pStart + star.cap
 }
 
 func (star *StarBuffer) getByte() (byte, error) {
-	if star.isClose || (star.isEnd && star.Len() == 0) {
+	if star.isClose.Load().(bool) || (star.Len() == 0 && star.isEnd.Load().(bool)) {
 		return 0, io.EOF
 	}
 	if star.Len() == 0 {
-		return 0, errors.New("no byte available now")
+		return 0, os.ErrNotExist
 	}
-	data := star.datas[star.pStart]
-	star.pStart++
-	if star.pStart == star.cap {
-		star.pStart = 0
+	nowPtr := star.pStart
+	nextPtr := star.pStart + 1
+	if nextPtr >= star.cap {
+		nextPtr = 0
+	}
+	data := star.datas[nowPtr]
+	ok := atomic.CompareAndSwapUint64(&star.pStart, nowPtr, nextPtr)
+	if !ok {
+		return 0, os.ErrInvalid
 	}
 	return data, nil
 }
 
 func (star *StarBuffer) putByte(data byte) error {
-	if star.isClose || star.isEnd {
+	if star.isClose.Load().(bool) {
 		return io.EOF
 	}
-	kariEnd := star.pEnd + 1
+	nowPtr := star.pEnd
+	kariEnd := nowPtr + 1
 	if kariEnd == star.cap {
 		kariEnd = 0
 	}
-	if kariEnd == star.pStart {
+	if kariEnd == atomic.LoadUint64(&star.pStart) {
 		for {
 			time.Sleep(time.Microsecond)
-			if kariEnd != star.pStart {
+			runtime.Gosched()
+			if kariEnd != atomic.LoadUint64(&star.pStart) {
 				break
 			}
 		}
 	}
-	star.datas[star.pEnd] = data
-	star.pEnd = kariEnd
+	star.datas[nowPtr] = data
+	if ok := atomic.CompareAndSwapUint64(&star.pEnd, nowPtr, kariEnd); !ok {
+		return os.ErrInvalid
+	}
 	return nil
 }
+
 func (star *StarBuffer) Close() error {
-	star.isClose = true
+	star.isClose.Store(true)
 	return nil
 }
 func (star *StarBuffer) Read(buf []byte) (int, error) {
-	if star.isClose {
+	if star.isClose.Load().(bool) || (star.Len() == 0 && star.isEnd.Load().(bool)) {
 		return 0, io.EOF
 	}
 	if buf == nil {
@@ -100,6 +114,10 @@ func (star *StarBuffer) Read(buf []byte) (int, error) {
 			if err == io.EOF {
 				return sum, err
 			}
+			if err == os.ErrNotExist {
+				i--
+				continue
+			}
 			return sum, nil
 		}
 		buf[i] = data
@@ -109,8 +127,11 @@ func (star *StarBuffer) Read(buf []byte) (int, error) {
 }
 
 func (star *StarBuffer) Write(bts []byte) (int, error) {
-	if bts == nil || star.isClose {
-		star.isEnd = true
+	if bts == nil && !star.isEnd.Load().(bool) {
+		star.isEnd.Store(true)
+		return 0, nil
+	}
+	if bts == nil || star.isClose.Load().(bool) {
 		return 0, io.EOF
 	}
 	star.wmu.Lock()

circle_test.go

@@ -0,0 +1,86 @@
+package stario
+
+import (
+	"fmt"
+	"sync/atomic"
+	"testing"
+	"time"
+)
+
+func Test_Circle(t *testing.T) {
+	buf := NewStarBuffer(2048)
+	go func() {
+		for {
+			//fmt.Println("write start")
+			buf.Write([]byte("中华人民共和国\n"))
+			//fmt.Println("write success")
+			time.Sleep(time.Millisecond * 50)
+		}
+	}()
+	cpp := ""
+	go func() {
+		time.Sleep(time.Second * 3)
+		for {
+			cache := make([]byte, 64)
+			ints, err := buf.Read(cache)
+			if err != nil {
+				fmt.Println("read error", err)
+				return
+			}
+			if ints != 0 {
+				cpp += string(cache[:ints])
+			}
+		}
+	}()
+	time.Sleep(time.Second * 13)
+	fmt.Println(cpp)
+}
+
+func Test_Circle_Speed(t *testing.T) {
+	buf := NewStarBuffer(1048976)
+	count := uint64(0)
+	for i := 1; i <= 10; i++ {
+		go func() {
+			for {
+				buf.putByte('a')
+			}
+		}()
+	}
+	for i := 1; i <= 10; i++ {
+		go func() {
+			for {
+				_, err := buf.getByte()
+				if err == nil {
+					atomic.AddUint64(&count, 1)
+				}
+			}
+		}()
+	}
+	time.Sleep(time.Second * 10)
+	fmt.Println(count)
+}
+
+func Test_Circle_Speed2(t *testing.T) {
+	buf := NewStarBuffer(8192)
+	count := uint64(0)
+	for i := 1; i <= 10; i++ {
+		go func() {
+			for {
+				buf.Write([]byte("hello world b612 hello world b612 b612 b612 b612 b612 b612"))
+			}
+		}()
+	}
+	for i := 1; i <= 10; i++ {
+		go func() {
+			for {
+				mybuf := make([]byte, 1024)
+				j, err := buf.Read(mybuf)
+				if err == nil {
+					atomic.AddUint64(&count, uint64(j))
+				}
+			}
+		}()
+	}
+	time.Sleep(time.Second * 10)
+	fmt.Println(float64(count) / 10 / 1024 / 1024)
+}

fn.go

@@ -0,0 +1,55 @@
+package stario
+
+import (
+	"errors"
+	"time"
+)
+
+var ERR_TIMEOUT = errors.New("TIME OUT")
+
+func WaitUntilTimeout(tm time.Duration, fn func(chan struct{}) error) error {
+	var err error
+	finished := make(chan struct{})
+	imout := make(chan struct{})
+	go func() {
+		err = fn(imout)
+		finished <- struct{}{}
+	}()
+	select {
+	case <-finished:
+		return err
+	case <-time.After(tm):
+		close(imout)
+		return ERR_TIMEOUT
+	}
+}
+
+func WaitUntilFinished(fn func() error) <-chan error {
+	finished := make(chan error)
+	go func() {
+		err := fn()
+		finished <- err
+	}()
+	return finished
+}
+
+func WaitUntilTimeoutFinished(tm time.Duration, fn func(chan struct{}) error) <-chan error {
+	var err error
+	finished := make(chan struct{})
+	result := make(chan error)
+	imout := make(chan struct{})
+	go func() {
+		err = fn(imout)
+		finished <- struct{}{}
+	}()
+	go func() {
+		select {
+		case <-finished:
+			result <- err
+		case <-time.After(tm):
+			close(imout)
+			result <- ERR_TIMEOUT
+		}
+	}()
+	return result
+}

go.mod

@@ -0,0 +1,5 @@
+module b612.me/stario
+
+go 1.16
+
+require golang.org/x/crypto v0.0.0-20220313003712-b769efc7c000

go.sum

@@ -0,0 +1,11 @@
+golang.org/x/crypto v0.0.0-20220313003712-b769efc7c000 h1:SL+8VVnkqyshUSz5iNnXtrBQzvFF2SkROm6t5RczFAE=
+golang.org/x/crypto v0.0.0-20220313003712-b769efc7c000/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1 h1:SrN+KX8Art/Sf4HNj6Zcz06G7VEz+7w9tdXTPOZ7+l4=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 h1:v+OssWQX+hTHEmOBgwxdZxK4zHq3yOs8F9J7mk0PY8E=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

io.go

@@ -11,8 +11,9 @@ import (
 )
 
 type InputMsg struct {
-	msg string
-	err error
+	msg             string
+	err             error
+	skipSliceSigErr bool
 }
 
 func Passwd(hint string, defaultVal string) InputMsg {
@@ -23,30 +24,103 @@ func PasswdWithMask(hint string, defaultVal string, mask string) InputMsg {
 	return passwd(hint, defaultVal, mask)
 }
 
-func passwd(hint string, defaultVal string, mask string) InputMsg {
-	var ioBuf []byte
+func MessageBoxRaw(hint string, defaultVal string) InputMsg {
+	return messageBox(hint, defaultVal)
+}
+
+func messageBox(hint string, defaultVal string) InputMsg {
+	var ioBuf []rune
 	if hint != "" {
 		fmt.Print(hint)
 	}
-	state, err := terminal.MakeRaw(int(os.Stdin.Fd()))
-	if err != nil {
-		return InputMsg{"", err}
+	if strings.Index(hint, "\n") >= 0 {
+		hint = strings.TrimSpace(hint[strings.LastIndex(hint, "\n"):])
 	}
-	defer terminal.Restore(0, state)
+	fd := int(os.Stdin.Fd())
+	state, err := terminal.MakeRaw(fd)
+	if err != nil {
+		return InputMsg{msg: "", err: err}
+	}
+	defer fmt.Println()
+	defer terminal.Restore(fd, state)
 	inputReader := bufio.NewReader(os.Stdin)
 	for {
-		b, err := inputReader.ReadByte()
+		b, _, err := inputReader.ReadRune()
 		if err != nil {
-			return InputMsg{"", err}
+			return InputMsg{msg: "", err: err}
 		}
 		if b == 0x0d {
-			fmt.Println()
-			return InputMsg{strings.TrimSpace(string(ioBuf)), nil}
+			strValue := strings.TrimSpace(string(ioBuf))
+			if len(strValue) == 0 {
+				strValue = defaultVal
+			}
+			return InputMsg{msg: strValue, err: err}
 		}
-		if mask != "" {
+		if b == 0x08 || b == 0x7F {
+			if len(ioBuf) > 0 {
+				ioBuf = ioBuf[:len(ioBuf)-1]
+			}
+			fmt.Print("\r")
+			for i := 0; i < len(ioBuf)+2+len(hint); i++ {
+				fmt.Print(" ")
+			}
+		} else {
+			ioBuf = append(ioBuf, b)
+		}
+		fmt.Print("\r")
+		if hint != "" {
+			fmt.Print(hint)
+		}
+		fmt.Print(string(ioBuf))
+	}
+}
+
+func passwd(hint string, defaultVal string, mask string) InputMsg {
+	var ioBuf []rune
+	if hint != "" {
+		fmt.Print(hint)
+	}
+	if strings.Index(hint, "\n") >= 0 {
+		hint = strings.TrimSpace(hint[strings.LastIndex(hint, "\n"):])
+	}
+	fd := int(os.Stdin.Fd())
+	state, err := terminal.MakeRaw(fd)
+	if err != nil {
+		return InputMsg{msg: "", err: err}
+	}
+	defer fmt.Println()
+	defer terminal.Restore(fd, state)
+	inputReader := bufio.NewReader(os.Stdin)
+	for {
+		b, _, err := inputReader.ReadRune()
+		if err != nil {
+			return InputMsg{msg: "", err: err}
+		}
+		if b == 0x0d {
+			strValue := strings.TrimSpace(string(ioBuf))
+			if len(strValue) == 0 {
+				strValue = defaultVal
+			}
+			return InputMsg{msg: strValue, err: err}
+		}
+		if b == 0x08 || b == 0x7F {
+			if len(ioBuf) > 0 {
+				ioBuf = ioBuf[:len(ioBuf)-1]
+			}
+			fmt.Print("\r")
+			for i := 0; i < len(ioBuf)+2+len(hint); i++ {
+				fmt.Print(" ")
+			}
+		} else {
+			ioBuf = append(ioBuf, b)
+		}
+		fmt.Print("\r")
+		if hint != "" {
+			fmt.Print(hint)
+		}
+		for i := 0; i < len(ioBuf); i++ {
 			fmt.Print(mask)
 		}
-		ioBuf = append(ioBuf, b)
 	}
 }
 
@@ -57,9 +131,18 @@ func MessageBox(hint string, defaultVal string) InputMsg {
 	inputReader := bufio.NewReader(os.Stdin)
 	str, err := inputReader.ReadString('\n')
 	if err != nil {
-		return InputMsg{"", err}
+		return InputMsg{msg: str, err: err}
 	}
-	return InputMsg{strings.TrimSpace(str), nil}
+	str = strings.TrimSpace(str)
+	if len(str) == 0 {
+		str = defaultVal
+	}
+	return InputMsg{msg: str, err: err}
+}
+
+func (im InputMsg) IgnoreSliceParseError(i bool) InputMsg {
+	im.skipSliceSigErr = i
+	return im
 }
 
 func (im InputMsg) String() (string, error) {
@@ -74,6 +157,35 @@ func (im InputMsg) MustString() string {
 	return res
 }
 
+func (im InputMsg) SliceString(sep string) ([]string, error) {
+	if im.err != nil {
+		return nil, im.err
+	}
+	return strings.Split(im.msg, sep), nil
+}
+
+func (im InputMsg) MustSliceString(sep string) []string {
+	res, _ := im.SliceString(sep)
+	return res
+}
+
+func (im InputMsg) sliceFn(sep string, fn func(string) (interface{}, error)) ([]interface{}, error) {
+	var res []interface{}
+	data, err := im.SliceString(sep)
+	if err != nil {
+		return res, err
+	}
+	for _, v := range data {
+		code, err := fn(v)
+		if err != nil && !im.skipSliceSigErr {
+			return nil, err
+		} else if err == nil {
+			res = append(res, code)
+		}
+	}
+	return res, nil
+}
+
 func (im InputMsg) Int() (int, error) {
 	if im.err != nil {
 		return 0, im.err
@@ -81,6 +193,22 @@ func (im InputMsg) Int() (int, error) {
 	return strconv.Atoi(im.msg)
 }
 
+func (im InputMsg) SliceInt(sep string) ([]int, error) {
+	data, err := im.sliceFn(sep, func(v string) (interface{}, error) {
+		return strconv.Atoi(v)
+	})
+	var res []int
+	for _, v := range data {
+		res = append(res, v.(int))
+	}
+	return res, err
+}
+
+func (im InputMsg) MustSliceInt(sep string) []int {
+	res, _ := im.SliceInt(sep)
+	return res
+}
+
 func (im InputMsg) MustInt() int {
 	res, _ := im.Int()
 	return res
@@ -98,6 +226,22 @@ func (im InputMsg) MustInt64() int64 {
 	return res
 }
 
+func (im InputMsg) SliceInt64(sep string) ([]int64, error) {
+	data, err := im.sliceFn(sep, func(v string) (interface{}, error) {
+		return strconv.ParseInt(v, 10, 64)
+	})
+	var res []int64
+	for _, v := range data {
+		res = append(res, v.(int64))
+	}
+	return res, err
+}
+
+func (im InputMsg) MustSliceInt64(sep string) []int64 {
+	res, _ := im.SliceInt64(sep)
+	return res
+}
+
 func (im InputMsg) Uint64() (uint64, error) {
 	if im.err != nil {
 		return 0, im.err
@@ -109,6 +253,21 @@ func (im InputMsg) MustUint64() uint64 {
 	res, _ := im.Uint64()
 	return res
 }
+func (im InputMsg) SliceUint64(sep string) ([]uint64, error) {
+	data, err := im.sliceFn(sep, func(v string) (interface{}, error) {
+		return strconv.ParseUint(v, 10, 64)
+	})
+	var res []uint64
+	for _, v := range data {
+		res = append(res, v.(uint64))
+	}
+	return res, err
+}
+
+func (im InputMsg) MustSliceUint64(sep string) []uint64 {
+	res, _ := im.SliceUint64(sep)
+	return res
+}
 
 func (im InputMsg) Bool() (bool, error) {
 	if im.err != nil {
@@ -122,6 +281,22 @@ func (im InputMsg) MustBool() bool {
 	return res
 }
 
+func (im InputMsg) SliceBool(sep string) ([]bool, error) {
+	data, err := im.sliceFn(sep, func(v string) (interface{}, error) {
+		return strconv.ParseBool(v)
+	})
+	var res []bool
+	for _, v := range data {
+		res = append(res, v.(bool))
+	}
+	return res, err
+}
+
+func (im InputMsg) MustSliceBool(sep string) []bool {
+	res, _ := im.SliceBool(sep)
+	return res
+}
+
 func (im InputMsg) Float64() (float64, error) {
 	if im.err != nil {
 		return 0, im.err
@@ -134,6 +309,22 @@ func (im InputMsg) MustFloat64() float64 {
 	return res
 }
 
+func (im InputMsg) SliceFloat64(sep string) ([]float64, error) {
+	data, err := im.sliceFn(sep, func(v string) (interface{}, error) {
+		return strconv.ParseFloat(v, 64)
+	})
+	var res []float64
+	for _, v := range data {
+		res = append(res, v.(float64))
+	}
+	return res, err
+}
+
+func (im InputMsg) MustSliceFloat64(sep string) []float64 {
+	res, _ := im.SliceFloat64(sep)
+	return res
+}
+
 func (im InputMsg) Float32() (float32, error) {
 	if im.err != nil {
 		return 0, im.err
@@ -147,48 +338,63 @@ func (im InputMsg) MustFloat32() float32 {
 	return res
 }
 
-func YesNo(hint string, defaults bool) bool {
-	res := strings.ToUpper(MessageBox(hint, "").MustString())
-	if res == "" {
-		return defaults
+func (im InputMsg) SliceFloat32(sep string) ([]float32, error) {
+	data, err := im.sliceFn(sep, func(v string) (interface{}, error) {
+		return strconv.ParseFloat(v, 32)
+	})
+	var res []float32
+	for _, v := range data {
+		res = append(res, v.(float32))
 	}
-	res = res[0:1]
-	if res == "Y" {
-		return true
-	} else if res == "N" {
-		return false
-	} else {
-		return defaults
+	return res, err
+}
+
+func (im InputMsg) MustSliceFloat32(sep string) []float32 {
+	res, _ := im.SliceFloat32(sep)
+	return res
+}
+
+func YesNo(hint string, defaults bool) bool {
+	for {
+		res := strings.ToUpper(MessageBox(hint, "").MustString())
+		if res == "" {
+			return defaults
+		}
+		res = res[0:1]
+		if res == "Y" {
+			return true
+		} else if res == "N" {
+			return false
+		}
 	}
 }
 
 func StopUntil(hint string, trigger string, repeat bool) error {
-	pressLen := len(trigger)
+	pressLen := len([]rune(trigger))
 	if trigger == "" {
 		pressLen = 1
-	} else {
-		pressLen = len(trigger)
 	}
-	state, err := terminal.MakeRaw(int(os.Stdin.Fd()))
+	fd := int(os.Stdin.Fd())
+	if hint != "" {
+		fmt.Print(hint)
+	}
+	state, err := terminal.MakeRaw(fd)
 	if err != nil {
 		return err
 	}
-	defer terminal.Restore(0, state)
+	defer terminal.Restore(fd, state)
 	inputReader := bufio.NewReader(os.Stdin)
 	//ioBuf := make([]byte, pressLen)
-	if hint != "" && !repeat {
-		fmt.Print(hint)
-	}
 	i := 0
 	for {
-		b, err := inputReader.ReadByte()
+		b, _, err := inputReader.ReadRune()
 		if err != nil {
 			return err
 		}
 		if trigger == "" {
 			break
 		}
-		if b == trigger[i] {
+		if b == []rune(trigger)[i] {
 			i++
 			if i == pressLen {
 				break
@@ -197,7 +403,7 @@ func StopUntil(hint string, trigger string, repeat bool) error {
 		}
 		i = 0
 		if hint != "" && repeat {
-			fmt.Print("\n")
+			fmt.Print("\r\n")
 			fmt.Print(hint)
 		}
 	}

io_test.go

@@ -0,0 +1,23 @@
+package stario
+
+import (
+	"fmt"
+	"testing"
+)
+
+func Test_Slice(t *testing.T) {
+	var data = InputMsg{
+		msg:             "true,false,true,true,false,0,1,hello",
+		err:             nil,
+		skipSliceSigErr: false,
+	}
+	res, err := data.IgnoreSliceParseError(true).SliceBool(",")
+	if err != nil {
+		fmt.Println(res)
+		t.Fatal(err)
+	}
+	if len(res) == 0 {
+		t.Fatal(res)
+	}
+	fmt.Println(res)
+}

sync.go

@@ -0,0 +1,55 @@
+package stario
+
+import (
+	"sync"
+	"sync/atomic"
+	"time"
+)
+
+type WaitGroup struct {
+	wg       *sync.WaitGroup
+	maxCount uint32
+	allCount uint32
+}
+
+func NewWaitGroup(maxCount int) WaitGroup {
+	return WaitGroup{wg: &sync.WaitGroup{}, maxCount: uint32(maxCount)}
+}
+
+func (swg *WaitGroup) Add(delta int) {
+	var Udelta uint32
+	if delta < 0 {
+		Udelta = uint32(-delta - 1)
+	} else {
+		Udelta = uint32(delta)
+	}
+	for {
+		allC := atomic.LoadUint32(&swg.allCount)
+		if atomic.LoadUint32(&swg.maxCount) == 0 || atomic.LoadUint32(&swg.maxCount) >= allC+uint32(delta) {
+			if delta < 0 {
+				atomic.AddUint32(&swg.allCount, ^uint32(Udelta))
+			} else {
+				atomic.AddUint32(&swg.allCount, uint32(Udelta))
+			}
+			break
+		}
+		time.Sleep(time.Microsecond)
+	}
+	swg.wg.Add(delta)
+}
+
+func (swg *WaitGroup) Done() {
+	swg.Add(-1)
+}
+
+func (swg *WaitGroup) Wait() {
+	swg.wg.Wait()
+}
+
+func (swg *WaitGroup) GetMaxWaitNum() int {
+	return int(atomic.LoadUint32(&swg.maxCount))
+}
+
+func (swg *WaitGroup) SetMaxWaitNum(num int) {
+	atomic.AddUint32(&swg.maxCount, uint32(num))
+}