fix:修复一些边界性问题

.gitignore

@@ -0,0 +1,7 @@
+.sentrux/
+agent_readme.md
+target.md
+.gocache
+.gocache/
+.tmp_*/
+.idea

circle.go

@@ -2,148 +2,191 @@ package stario
 
 import (
 	"errors"
-	"fmt"
 	"io"
-	"os"
-	"runtime"
 	"sync"
-	"sync/atomic"
-	"time"
 )
 
+var ErrStarBufferInvalidCapacity = errors.New("star buffer capacity must be greater than zero")
+var ErrStarBufferClosed = errors.New("star buffer closed")
+var ErrStarBufferWriteClosed = errors.New("star buffer write closed")
+
 type StarBuffer struct {
-	io.Reader
-	io.Writer
-	io.Closer
-	datas   []byte
-	pStart  uint64
-	pEnd    uint64
-	cap     uint64
-	isClose atomic.Value
-	isEnd   atomic.Value
-	rmu     sync.Mutex
-	wmu     sync.Mutex
+	datas      []byte
+	pStart     uint64
+	pEnd       uint64
+	size       uint64
+	cap        uint64
+	isClose    bool
+	isWriteEnd bool
+	mu         sync.Mutex
+	notEmpty   *sync.Cond
+	notFull    *sync.Cond
 }
 
-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 NewStarBuffer(cap uint64) (*StarBuffer, error) {
+	if cap == 0 {
+		return nil, ErrStarBufferInvalidCapacity
+	}
+	rtnBuffer := &StarBuffer{
+		cap:   cap,
+		datas: make([]byte, cap),
+	}
+	rtnBuffer.notEmpty = sync.NewCond(&rtnBuffer.mu)
+	rtnBuffer.notFull = sync.NewCond(&rtnBuffer.mu)
+	return rtnBuffer, nil
 }
 
 func (star *StarBuffer) Free() uint64 {
-	return star.cap - star.Len()
+	star.mu.Lock()
+	defer star.mu.Unlock()
+	return star.cap - star.size
 }
 
 func (star *StarBuffer) Cap() uint64 {
+	star.mu.Lock()
+	defer star.mu.Unlock()
 	return star.cap
 }
 
 func (star *StarBuffer) Len() uint64 {
-	if star.pEnd >= star.pStart {
-		return star.pEnd - star.pStart
-	}
-	return star.pEnd - star.pStart + star.cap
+	star.mu.Lock()
+	defer star.mu.Unlock()
+	return star.size
 }
 
 func (star *StarBuffer) getByte() (byte, error) {
-	if star.isClose.Load().(bool) || (star.Len() == 0 && star.isEnd.Load().(bool)) {
+	star.mu.Lock()
+	defer star.mu.Unlock()
+	for star.size == 0 && !star.isWriteEnd && !star.isClose {
+		star.notEmpty.Wait()
+	}
+	if star.size == 0 {
 		return 0, io.EOF
 	}
-	if star.Len() == 0 {
-		return 0, os.ErrNotExist
-	}
-	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
-	}
+	data := star.datas[star.pStart]
+	star.pStart = (star.pStart + 1) % star.cap
+	star.size--
+	star.notFull.Broadcast()
 	return data, nil
 }
 
 func (star *StarBuffer) putByte(data byte) error {
-	if star.isClose.Load().(bool) {
-		return io.EOF
+	star.mu.Lock()
+	defer star.mu.Unlock()
+	for star.size == star.cap && !star.isClose && !star.isWriteEnd {
+		star.notFull.Wait()
 	}
-	nowPtr := star.pEnd
-	kariEnd := nowPtr + 1
-	if kariEnd == star.cap {
-		kariEnd = 0
+	if star.isClose {
+		return ErrStarBufferClosed
 	}
-	if kariEnd == atomic.LoadUint64(&star.pStart) {
-		for {
-			time.Sleep(time.Microsecond)
-			runtime.Gosched()
-			if kariEnd != atomic.LoadUint64(&star.pStart) {
-				break
-			}
-		}
+	if star.isWriteEnd {
+		return ErrStarBufferWriteClosed
 	}
-	star.datas[nowPtr] = data
-	if ok := atomic.CompareAndSwapUint64(&star.pEnd, nowPtr, kariEnd); !ok {
-		return os.ErrInvalid
+	star.datas[star.pEnd] = data
+	star.pEnd = (star.pEnd + 1) % star.cap
+	star.size++
+	star.notEmpty.Broadcast()
+	return nil
+}
+
+func (star *StarBuffer) EndWrite() error {
+	star.mu.Lock()
+	defer star.mu.Unlock()
+	if star.isClose {
+		return ErrStarBufferClosed
 	}
+	star.isWriteEnd = true
+	star.notEmpty.Broadcast()
+	star.notFull.Broadcast()
 	return nil
 }
 
 func (star *StarBuffer) Close() error {
-	star.isClose.Store(true)
+	star.mu.Lock()
+	defer star.mu.Unlock()
+	star.isClose = true
+	star.isWriteEnd = true
+	star.notEmpty.Broadcast()
+	star.notFull.Broadcast()
 	return nil
 }
+
 func (star *StarBuffer) Read(buf []byte) (int, error) {
-	if star.isClose.Load().(bool) || (star.Len() == 0 && star.isEnd.Load().(bool)) {
-		return 0, io.EOF
-	}
 	if buf == nil {
 		return 0, errors.New("buffer is nil")
 	}
-	star.rmu.Lock()
-	defer star.rmu.Unlock()
-	var sum int = 0
-	for i := 0; i < len(buf); i++ {
-		data, err := star.getByte()
-		if err != nil {
-			if err == io.EOF {
-				return sum, err
-			}
-			if err == os.ErrNotExist {
-				i--
-				continue
-			}
-			return sum, nil
-		}
-		buf[i] = data
-		sum++
+	if len(buf) == 0 {
+		return 0, nil
 	}
+	star.mu.Lock()
+	defer star.mu.Unlock()
+	for star.size == 0 && !star.isWriteEnd && !star.isClose {
+		star.notEmpty.Wait()
+	}
+	if star.size == 0 {
+		return 0, io.EOF
+	}
+	sum := minInt(len(buf), int(star.size))
+	first := minInt(sum, int(star.cap-star.pStart))
+	copy(buf, star.datas[star.pStart:star.pStart+uint64(first)])
+	second := sum - first
+	if second > 0 {
+		copy(buf[first:], star.datas[:second])
+	}
+	star.pStart = (star.pStart + uint64(sum)) % star.cap
+	star.size -= uint64(sum)
+	star.notFull.Broadcast()
 	return sum, nil
 }
 
 func (star *StarBuffer) Write(bts []byte) (int, error) {
-	if bts == nil && !star.isEnd.Load().(bool) {
-		star.isEnd.Store(true)
+	if bts == nil {
+		return 0, star.EndWrite()
+	}
+	if len(bts) == 0 {
 		return 0, nil
 	}
-	if bts == nil || star.isClose.Load().(bool) {
-		return 0, io.EOF
-	}
-	star.wmu.Lock()
-	defer star.wmu.Unlock()
-	var sum = 0
-	for i := 0; i < len(bts); i++ {
-		err := star.putByte(bts[i])
-		if err != nil {
-			fmt.Println("Write bts err:", err)
-			return sum, err
+	star.mu.Lock()
+	defer star.mu.Unlock()
+	sum := 0
+	for sum < len(bts) {
+		for star.size == star.cap && !star.isClose && !star.isWriteEnd {
+			star.notFull.Wait()
 		}
-		sum++
+		if star.isClose {
+			if sum == 0 {
+				return 0, ErrStarBufferClosed
+			}
+			return sum, ErrStarBufferClosed
+		}
+		if star.isWriteEnd {
+			if sum == 0 {
+				return 0, ErrStarBufferWriteClosed
+			}
+			return sum, ErrStarBufferWriteClosed
+		}
+		space := int(star.cap - star.size)
+		if space == 0 {
+			continue
+		}
+		n := minInt(len(bts)-sum, space)
+		first := minInt(n, int(star.cap-star.pEnd))
+		copy(star.datas[star.pEnd:star.pEnd+uint64(first)], bts[sum:sum+first])
+		second := n - first
+		if second > 0 {
+			copy(star.datas[:second], bts[sum+first:sum+n])
+		}
+		star.pEnd = (star.pEnd + uint64(n)) % star.cap
+		star.size += uint64(n)
+		sum += n
+		star.notEmpty.Broadcast()
 	}
 	return sum, nil
 }
+
+func minInt(a int, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}

circle_test.go

@@ -1,14 +1,91 @@
 package stario
 
 import (
+	"bytes"
 	"fmt"
+	"io"
 	"sync/atomic"
 	"testing"
 	"time"
 )
 
+func TestNewStarBufferRejectsZeroCapacity(t *testing.T) {
+	buf, err := NewStarBuffer(0)
+	if err != ErrStarBufferInvalidCapacity {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if buf != nil {
+		t.Fatal("expected nil buffer when capacity is invalid")
+	}
+}
+
+func TestStarBufferEndWriteDrainsThenEOF(t *testing.T) {
+	buf, err := NewStarBuffer(4)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := buf.Write([]byte("abcd")); err != nil {
+		t.Fatal(err)
+	}
+	if err := buf.EndWrite(); err != nil {
+		t.Fatal(err)
+	}
+
+	got := make([]byte, 4)
+	n, err := buf.Read(got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if n != 4 || !bytes.Equal(got[:n], []byte("abcd")) {
+		t.Fatalf("unexpected payload: n=%d data=%q", n, got[:n])
+	}
+
+	n, err = buf.Read(got)
+	if n != 0 || err != io.EOF {
+		t.Fatalf("expected EOF after draining buffer, got n=%d err=%v", n, err)
+	}
+
+	if _, err := buf.Write([]byte("x")); err != ErrStarBufferWriteClosed {
+		t.Fatalf("unexpected write error after EndWrite: %v", err)
+	}
+}
+
+func TestStarBufferCloseAllowsDrain(t *testing.T) {
+	buf, err := NewStarBuffer(4)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := buf.Write([]byte("ab")); err != nil {
+		t.Fatal(err)
+	}
+	if err := buf.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	got := make([]byte, 2)
+	n, err := buf.Read(got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if n != 2 || !bytes.Equal(got[:n], []byte("ab")) {
+		t.Fatalf("unexpected payload after close: n=%d data=%q", n, got[:n])
+	}
+
+	n, err = buf.Read(got)
+	if n != 0 || err != io.EOF {
+		t.Fatalf("expected EOF after draining closed buffer, got n=%d err=%v", n, err)
+	}
+
+	if _, err := buf.Write([]byte("x")); err != ErrStarBufferClosed {
+		t.Fatalf("unexpected write error after Close: %v", err)
+	}
+}
+
 func Test_Circle(t *testing.T) {
-	buf := NewStarBuffer(2048)
+	buf, err := NewStarBuffer(2048)
+	if err != nil {
+		t.Fatal(err)
+	}
 	go func() {
 		for {
 			//fmt.Println("write start")
@@ -37,7 +114,10 @@ func Test_Circle(t *testing.T) {
 }
 
 func Test_Circle_Speed(t *testing.T) {
-	buf := NewStarBuffer(1048976)
+	buf, err := NewStarBuffer(1048976)
+	if err != nil {
+		t.Fatal(err)
+	}
 	count := uint64(0)
 	for i := 1; i <= 10; i++ {
 		go func() {
@@ -61,7 +141,10 @@ func Test_Circle_Speed(t *testing.T) {
 }
 
 func Test_Circle_Speed2(t *testing.T) {
-	buf := NewStarBuffer(8192)
+	buf, err := NewStarBuffer(8192)
+	if err != nil {
+		t.Fatal(err)
+	}
 	count := uint64(0)
 	for i := 1; i <= 10; i++ {
 		go func() {

go.mod

@@ -2,4 +2,4 @@ module b612.me/stario
 
 go 1.16
 
-require golang.org/x/crypto v0.0.0-20220313003712-b769efc7c000
+require golang.org/x/crypto v0.26.0

go.sum

@@ -1,11 +1,67 @@
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-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=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
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+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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+golang.org/x/term v0.23.0/go.mod h1:DgV24QBUrK6jhZXl+20l6UWznPlwAHm1Q1mGHtydmSk=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.17.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
+golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

io.go

@@ -3,126 +3,215 @@ package stario
 import (
 	"bufio"
 	"fmt"
+	"golang.org/x/crypto/ssh/terminal"
 	"os"
+	"runtime"
 	"strconv"
 	"strings"
-
-	"golang.org/x/crypto/ssh/terminal"
 )
 
 type InputMsg struct {
-	msg string
-	err error
+	msg             string
+	err             error
+	skipSliceSigErr bool
+}
+
+type rawTerminalSession struct {
+	fd           int
+	state        *terminal.State
+	reader       *bufio.Reader
+	redrawHint   string
+	printNewline bool
 }
 
 func Passwd(hint string, defaultVal string) InputMsg {
-	return passwd(hint, defaultVal, "")
+	return passwd(hint, defaultVal, "", true)
 }
 
 func PasswdWithMask(hint string, defaultVal string, mask string) InputMsg {
-	return passwd(hint, defaultVal, mask)
+	return passwd(hint, defaultVal, mask, true)
+}
+
+func PasswdResponseSignal(hint string, defaultVal string) InputMsg {
+	return passwd(hint, defaultVal, "", true)
+}
+
+func PasswdResponseSignalWithMask(hint string, defaultVal string, mask string) InputMsg {
+	return passwd(hint, defaultVal, mask, true)
 }
 
 func MessageBoxRaw(hint string, defaultVal string) InputMsg {
 	return messageBox(hint, defaultVal)
 }
 
-func messageBox(hint string, defaultVal string) InputMsg {
-	var ioBuf []rune
+func newRawTerminalSession(hint string, printNewline bool) (*rawTerminalSession, error) {
 	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{"", err}
+		return nil, err
 	}
-	defer fmt.Println()
-	defer terminal.Restore(fd, state)
-	inputReader := bufio.NewReader(os.Stdin)
-	for {
-		b, _, err := inputReader.ReadRune()
-		if err != nil {
-			return InputMsg{"", err}
-		}
-		if b == 0x0d {
-			strValue := strings.TrimSpace(string(ioBuf))
-			if len(strValue) == 0 {
-				strValue = defaultVal
-			}
-			return InputMsg{strValue, nil}
-		}
-		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))
+	return &rawTerminalSession{
+		fd:           fd,
+		state:        state,
+		reader:       bufio.NewReader(os.Stdin),
+		redrawHint:   promptRedrawHint(hint),
+		printNewline: printNewline,
+	}, nil
+}
+
+func (session *rawTerminalSession) Close() {
+	if session == nil || session.state == nil {
+		return
+	}
+	_ = terminal.Restore(session.fd, session.state)
+	if session.printNewline {
+		fmt.Println()
 	}
 }
 
-func passwd(hint string, defaultVal string, mask string) InputMsg {
-	var ioBuf []rune
+func (session *rawTerminalSession) Restore() error {
+	if session == nil || session.state == nil {
+		return nil
+	}
+	return terminal.Restore(session.fd, session.state)
+}
+
+func promptRedrawHint(hint string) string {
+	if strings.Index(hint, "\n") >= 0 {
+		hint = hint[strings.LastIndex(hint, "\n")+1:]
+	}
+	return strings.TrimSpace(hint)
+}
+
+func finalizeInputValue(raw string, defaultVal string) string {
+	raw = strings.TrimSpace(raw)
+	if len(raw) == 0 {
+		return defaultVal
+	}
+	return raw
+}
+
+func renderRawEcho(ioBuf []rune, mask string) string {
+	if mask == "" {
+		return string(ioBuf)
+	}
+	return strings.Repeat(mask, len(ioBuf))
+}
+
+func redrawPromptLine(hint string, echo string, lastWidth int) int {
+	nowWidth := stringDisplayWidth(hint) + stringDisplayWidth(echo)
+	clearWidth := lastWidth
+	if nowWidth > clearWidth {
+		clearWidth = nowWidth
+	}
+	fmt.Print("\r")
+	if clearWidth > 0 {
+		fmt.Print(strings.Repeat(" ", clearWidth))
+		fmt.Print("\r")
+	}
 	if hint != "" {
 		fmt.Print(hint)
 	}
-	if strings.Index(hint, "\n") >= 0 {
-		hint = strings.TrimSpace(hint[strings.LastIndex(hint, "\n"):])
+	if echo != "" {
+		fmt.Print(echo)
 	}
-	fd := int(os.Stdin.Fd())
-	state, err := terminal.MakeRaw(fd)
+	return nowWidth
+}
+
+func stringDisplayWidth(text string) int {
+	width := 0
+	for _, r := range text {
+		width += runeDisplayWidth(r)
+	}
+	return width
+}
+
+func runeDisplayWidth(r rune) int {
+	switch {
+	case r == '\t':
+		return 4
+	case r < 0x20 || (r >= 0x7f && r < 0xa0):
+		return 0
+	case isWideRune(r):
+		return 2
+	default:
+		return 1
+	}
+}
+
+func isWideRune(r rune) bool {
+	return r >= 0x1100 && (r <= 0x115f ||
+		r == 0x2329 || r == 0x232a ||
+		(r >= 0x2e80 && r <= 0xa4cf && r != 0x303f) ||
+		(r >= 0xac00 && r <= 0xd7a3) ||
+		(r >= 0xf900 && r <= 0xfaff) ||
+		(r >= 0xfe10 && r <= 0xfe19) ||
+		(r >= 0xfe30 && r <= 0xfe6f) ||
+		(r >= 0xff00 && r <= 0xff60) ||
+		(r >= 0xffe0 && r <= 0xffe6) ||
+		(r >= 0x1f300 && r <= 0x1f64f) ||
+		(r >= 0x1f900 && r <= 0x1f9ff) ||
+		(r >= 0x20000 && r <= 0x3fffd))
+}
+
+func rawLineInput(hint string, defaultVal string, mask string, handleSignal bool) InputMsg {
+	session, err := newRawTerminalSession(hint, true)
 	if err != nil {
-		return InputMsg{"", err}
+		return InputMsg{msg: "", err: err}
 	}
-	defer fmt.Println()
-	defer terminal.Restore(fd, state)
-	inputReader := bufio.NewReader(os.Stdin)
+	defer session.Close()
+	ioBuf := make([]rune, 0, 16)
+	lastWidth := 0
 	for {
-		b, _, err := inputReader.ReadRune()
+		b, _, err := session.reader.ReadRune()
 		if err != nil {
-			return InputMsg{"", err}
+			return InputMsg{msg: "", err: err}
 		}
-		if b == 0x0d {
-			strValue := strings.TrimSpace(string(ioBuf))
-			if len(strValue) == 0 {
-				strValue = defaultVal
+		if handleSignal && isSignal(b) {
+			if runtime.GOOS != "windows" {
+				if err := session.Restore(); err != nil {
+					return InputMsg{msg: "", err: err}
+				}
 			}
-			return InputMsg{strValue, nil}
+			if err := signal(b); err != nil {
+				return InputMsg{msg: "", err: err}
+			}
+			continue
 		}
-		if b == 0x08 || b == 0x7F {
+		switch b {
+		case 0x0d, 0x0a:
+			return InputMsg{msg: finalizeInputValue(string(ioBuf), defaultVal), err: nil}
+		case 0x08, 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 {
+		default:
 			ioBuf = append(ioBuf, b)
 		}
-		fmt.Print("\r")
-		if hint != "" {
-			fmt.Print(hint)
-		}
-		for i := 0; i < len(ioBuf); i++ {
-			fmt.Print(mask)
-		}
+		lastWidth = redrawPromptLine(session.redrawHint, renderRawEcho(ioBuf, mask), lastWidth)
 	}
 }
 
+func messageBox(hint string, defaultVal string) InputMsg {
+	return rawLineInput(hint, defaultVal, "", false)
+}
+
+func isSignal(s rune) bool {
+	switch s {
+	case 0x03, 0x1a, 0x1c:
+		return true
+	default:
+		return false
+	}
+}
+
+func passwd(hint string, defaultVal string, mask string, handleSignal bool) InputMsg {
+	return rawLineInput(hint, defaultVal, mask, handleSignal)
+}
+
 func MessageBox(hint string, defaultVal string) InputMsg {
 	if hint != "" {
 		fmt.Print(hint)
@@ -130,13 +219,15 @@ 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}
 	}
-	str = strings.TrimSpace(str)
-	if len(str) == 0 {
-		str = defaultVal
-	}
-	return InputMsg{str, nil}
+	str = finalizeInputValue(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) {
@@ -151,6 +242,38 @@ func (im InputMsg) MustString() string {
 	return res
 }
 
+func (im InputMsg) SliceString(sep string) ([]string, error) {
+	if im.err != nil {
+		return nil, im.err
+	}
+	if len(strings.TrimSpace(im.msg)) == 0 {
+		return []string{}, nil
+	}
+	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
@@ -158,6 +281,22 @@ 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
@@ -175,6 +314,22 @@ 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
@@ -186,6 +341,21 @@ 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 {
@@ -199,6 +369,22 @@ 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
@@ -211,6 +397,22 @@ 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
@@ -224,47 +426,78 @@ func (im InputMsg) MustFloat32() float32 {
 	return res
 }
 
+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))
+	}
+	return res, err
+}
+
+func (im InputMsg) MustSliceFloat32(sep string) []float32 {
+	res, _ := im.SliceFloat32(sep)
+	return res
+}
+
 func YesNo(hint string, defaults bool) bool {
+	res, err := YesNoE(hint, defaults)
+	if err != nil {
+		return defaults
+	}
+	return res
+}
+
+func parseYesNoValue(raw string, defaults bool) (bool, bool) {
+	raw = strings.TrimSpace(strings.ToUpper(raw))
+	if raw == "" {
+		return defaults, true
+	}
+	switch []rune(raw)[0] {
+	case 'Y':
+		return true, true
+	case 'N':
+		return false, true
+	default:
+		return false, false
+	}
+}
+
+func YesNoE(hint string, defaults bool) (bool, error) {
 	for {
-		res := strings.ToUpper(MessageBox(hint, "").MustString())
-		if res == "" {
-			return defaults
+		res, err := MessageBox(hint, "").String()
+		if err != nil {
+			return false, err
 		}
-		res = res[0:1]
-		if res == "Y" {
-			return true
-		} else if res == "N" {
-			return false
+		if answer, ok := parseYesNoValue(res, defaults); ok {
+			return answer, nil
 		}
 	}
 }
 
 func StopUntil(hint string, trigger string, repeat bool) error {
-	pressLen := len([]rune(trigger))
+	triggerRunes := []rune(trigger)
+	pressLen := len(triggerRunes)
 	if trigger == "" {
 		pressLen = 1
 	}
-	fd := int(os.Stdin.Fd())
-	if hint != "" {
-		fmt.Print(hint)
-	}
-	state, err := terminal.MakeRaw(fd)
+	session, err := newRawTerminalSession(hint, false)
 	if err != nil {
 		return err
 	}
-	defer terminal.Restore(fd, state)
-	inputReader := bufio.NewReader(os.Stdin)
-	//ioBuf := make([]byte, pressLen)
+	defer session.Close()
 	i := 0
 	for {
-		b, _, err := inputReader.ReadRune()
+		b, _, err := session.reader.ReadRune()
 		if err != nil {
 			return err
 		}
 		if trigger == "" {
 			break
 		}
-		if b == []rune(trigger)[i] {
+		if b == triggerRunes[i] {
 			i++
 			if i == pressLen {
 				break

io_test.go

@@ -0,0 +1,84 @@
+package stario
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestPromptRedrawHint(t *testing.T) {
+	got := promptRedrawHint("头部提示\n 中文确认: ")
+	if got != "中文确认:" {
+		t.Fatalf("unexpected redraw hint: got %q", got)
+	}
+}
+
+func TestStringDisplayWidth(t *testing.T) {
+	got := stringDisplayWidth("中a[]")
+	if got != 5 {
+		t.Fatalf("unexpected display width: got %d want 5", got)
+	}
+}
+
+func TestParseYesNoValue(t *testing.T) {
+	cases := []struct {
+		name     string
+		input    string
+		defaults bool
+		want     bool
+		ok       bool
+	}{
+		{name: "default", input: "   ", defaults: true, want: true, ok: true},
+		{name: "yes", input: "yes", defaults: false, want: true, ok: true},
+		{name: "no", input: "No", defaults: true, want: false, ok: true},
+		{name: "invalid", input: "maybe", defaults: false, want: false, ok: false},
+	}
+	for _, tc := range cases {
+		got, ok := parseYesNoValue(tc.input, tc.defaults)
+		if got != tc.want || ok != tc.ok {
+			t.Fatalf("%s: got (%v, %v) want (%v, %v)", tc.name, got, ok, tc.want, tc.ok)
+		}
+	}
+}
+
+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)
+}
+
+func TestSliceMsg(t *testing.T) {
+	var data = InputMsg{
+		msg:             "",
+		err:             nil,
+		skipSliceSigErr: false,
+	}
+	res, err := data.SliceString(",")
+	if err != nil {
+		fmt.Println(res)
+		t.Fatal(err)
+	}
+	if len(res) != 0 {
+		t.Fatal(res)
+	}
+	fmt.Println(len(res))
+	res2, err := data.SliceInt64(",")
+	if err != nil {
+		fmt.Println(res2)
+		t.Fatal(err)
+	}
+	if len(res2) != 0 {
+		t.Fatal(res2)
+	}
+	fmt.Println(len(res2))
+}

que.go

@@ -0,0 +1,325 @@
+package stario
+
+import (
+	"bytes"
+	"context"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"os"
+	"sync"
+	"time"
+)
+
+var ErrDeadlineExceeded error = errors.New("deadline exceeded")
+
+// 识别头
+var header = []byte{11, 27, 19, 96, 12, 25, 02, 20}
+
+// MsgQueue 为基本的信息单位
+type MsgQueue struct {
+	ID   uint16
+	Msg  []byte
+	Conn interface{}
+}
+
+// StarQueue 为流数据中的消息队列分发
+type StarQueue struct {
+	maxLength  uint32
+	count      int64
+	Encode     bool
+	msgID      uint16
+	msgPool    chan MsgQueue
+	unFinMsg   sync.Map
+	lastID     int //= -1
+	ctx        context.Context
+	cancel     context.CancelFunc
+	duration   time.Duration
+	EncodeFunc func([]byte) []byte
+	DecodeFunc func([]byte) []byte
+	//restoreMu  sync.Mutex
+}
+
+func NewQueueCtx(ctx context.Context, count int64, maxMsgLength uint32) *StarQueue {
+	var q StarQueue
+	q.Encode = false
+	q.count = count
+	q.maxLength = maxMsgLength
+	q.msgPool = make(chan MsgQueue, count)
+	if ctx == nil {
+		q.ctx, q.cancel = context.WithCancel(context.Background())
+	} else {
+		q.ctx, q.cancel = context.WithCancel(ctx)
+	}
+	q.duration = 0
+	return &q
+}
+func NewQueueWithCount(count int64) *StarQueue {
+	return NewQueueCtx(nil, count, 0)
+}
+
+// NewQueue 建立一个新消息队列
+func NewQueue() *StarQueue {
+	return NewQueueWithCount(32)
+}
+
+// Uint32ToByte 4位uint32转byte
+func Uint32ToByte(src uint32) []byte {
+	res := make([]byte, 4)
+	res[3] = uint8(src)
+	res[2] = uint8(src >> 8)
+	res[1] = uint8(src >> 16)
+	res[0] = uint8(src >> 24)
+	return res
+}
+
+// ByteToUint32 byte转4位uint32
+func ByteToUint32(src []byte) uint32 {
+	var res uint32
+	buffer := bytes.NewBuffer(src)
+	binary.Read(buffer, binary.BigEndian, &res)
+	return res
+}
+
+// Uint16ToByte 2位uint16转byte
+func Uint16ToByte(src uint16) []byte {
+	res := make([]byte, 2)
+	res[1] = uint8(src)
+	res[0] = uint8(src >> 8)
+	return res
+}
+
+// ByteToUint16 用于byte转uint16
+func ByteToUint16(src []byte) uint16 {
+	var res uint16
+	buffer := bytes.NewBuffer(src)
+	binary.Read(buffer, binary.BigEndian, &res)
+	return res
+}
+
+// BuildMessage 生成编码后的信息用于发送
+func (q *StarQueue) BuildMessage(src []byte) []byte {
+	var buff bytes.Buffer
+	q.msgID++
+	if q.Encode {
+		src = q.EncodeFunc(src)
+	}
+	length := uint32(len(src))
+	buff.Write(header)
+	buff.Write(Uint32ToByte(length))
+	buff.Write(Uint16ToByte(q.msgID))
+	buff.Write(src)
+	return buff.Bytes()
+}
+
+// BuildHeader 生成编码后的Header用于发送
+func (q *StarQueue) BuildHeader(length uint32) []byte {
+	var buff bytes.Buffer
+	q.msgID++
+	buff.Write(header)
+	buff.Write(Uint32ToByte(length))
+	buff.Write(Uint16ToByte(q.msgID))
+	return buff.Bytes()
+}
+
+type unFinMsg struct {
+	ID         uint16
+	LengthRecv uint32
+	// HeaderMsg 信息头，应当为14位：8位识别码+4位长度码+2位id
+	HeaderMsg []byte
+	RecvMsg   []byte
+}
+
+func (q *StarQueue) push2list(msg MsgQueue) {
+	q.msgPool <- msg
+}
+
+// ParseMessage 用于解析收到的msg信息
+func (q *StarQueue) ParseMessage(msg []byte, conn interface{}) error {
+	return q.parseMessage(msg, conn)
+}
+
+// parseMessage 用于解析收到的msg信息
+func (q *StarQueue) parseMessage(msg []byte, conn interface{}) error {
+	tmp, ok := q.unFinMsg.Load(conn)
+	if ok { //存在未完成的信息
+		lastMsg := tmp.(*unFinMsg)
+		headerLen := len(lastMsg.HeaderMsg)
+		if headerLen < 14 { //未完成头标题
+			//传输的数据不能填充header头
+			if len(msg) < 14-headerLen {
+				//加入header头并退出
+				lastMsg.HeaderMsg = bytesMerge(lastMsg.HeaderMsg, msg)
+				q.unFinMsg.Store(conn, lastMsg)
+				return nil
+			}
+			//获取14字节完整的header
+			header := msg[0 : 14-headerLen]
+			lastMsg.HeaderMsg = bytesMerge(lastMsg.HeaderMsg, header)
+			//检查收到的header是否为认证header
+			//若不是，丢弃并重新来过
+			if !checkHeader(lastMsg.HeaderMsg[0:8]) {
+				q.unFinMsg.Delete(conn)
+				if len(msg) == 0 {
+					return nil
+				}
+				return q.parseMessage(msg, conn)
+			}
+			//获得本数据包长度
+			lastMsg.LengthRecv = ByteToUint32(lastMsg.HeaderMsg[8:12])
+			if q.maxLength != 0 && lastMsg.LengthRecv > q.maxLength {
+				q.unFinMsg.Delete(conn)
+				return fmt.Errorf("msg length is %d ,too large than %d", lastMsg.LengthRecv, q.maxLength)
+			}
+			//获得本数据包ID
+			lastMsg.ID = ByteToUint16(lastMsg.HeaderMsg[12:14])
+			//存入列表
+			q.unFinMsg.Store(conn, lastMsg)
+			msg = msg[14-headerLen:]
+			if uint32(len(msg)) < lastMsg.LengthRecv {
+				lastMsg.RecvMsg = msg
+				q.unFinMsg.Store(conn, lastMsg)
+				return nil
+			}
+			if uint32(len(msg)) >= lastMsg.LengthRecv {
+				lastMsg.RecvMsg = msg[0:lastMsg.LengthRecv]
+				if q.Encode {
+					lastMsg.RecvMsg = q.DecodeFunc(lastMsg.RecvMsg)
+				}
+				msg = msg[lastMsg.LengthRecv:]
+				storeMsg := MsgQueue{
+					ID:   lastMsg.ID,
+					Msg:  lastMsg.RecvMsg,
+					Conn: conn,
+				}
+				//q.restoreMu.Lock()
+				q.push2list(storeMsg)
+				//q.restoreMu.Unlock()
+				q.unFinMsg.Delete(conn)
+				return q.parseMessage(msg, conn)
+			}
+		} else {
+			lastID := int(lastMsg.LengthRecv) - len(lastMsg.RecvMsg)
+			if lastID < 0 {
+				q.unFinMsg.Delete(conn)
+				return q.parseMessage(msg, conn)
+			}
+			if len(msg) >= lastID {
+				lastMsg.RecvMsg = bytesMerge(lastMsg.RecvMsg, msg[0:lastID])
+				if q.Encode {
+					lastMsg.RecvMsg = q.DecodeFunc(lastMsg.RecvMsg)
+				}
+				storeMsg := MsgQueue{
+					ID:   lastMsg.ID,
+					Msg:  lastMsg.RecvMsg,
+					Conn: conn,
+				}
+				q.push2list(storeMsg)
+				q.unFinMsg.Delete(conn)
+				if len(msg) == lastID {
+					return nil
+				}
+				msg = msg[lastID:]
+				return q.parseMessage(msg, conn)
+			}
+			lastMsg.RecvMsg = bytesMerge(lastMsg.RecvMsg, msg)
+			q.unFinMsg.Store(conn, lastMsg)
+			return nil
+		}
+	}
+	if len(msg) == 0 {
+		return nil
+	}
+	var start int
+	if start = searchHeader(msg); start == -1 {
+		return errors.New("data format error")
+	}
+	msg = msg[start:]
+	lastMsg := unFinMsg{}
+	q.unFinMsg.Store(conn, &lastMsg)
+	return q.parseMessage(msg, conn)
+}
+
+func checkHeader(msg []byte) bool {
+	if len(msg) != 8 {
+		return false
+	}
+	for k, v := range msg {
+		if v != header[k] {
+			return false
+		}
+	}
+	return true
+}
+
+func searchHeader(msg []byte) int {
+	if len(msg) < 8 {
+		return 0
+	}
+	for k, v := range msg {
+		find := 0
+		if v == header[0] {
+			for k2, v2 := range header {
+				if msg[k+k2] == v2 {
+					find++
+				} else {
+					break
+				}
+			}
+			if find == 8 {
+				return k
+			}
+		}
+	}
+	return -1
+}
+
+func bytesMerge(src ...[]byte) []byte {
+	var buff bytes.Buffer
+	for _, v := range src {
+		buff.Write(v)
+	}
+	return buff.Bytes()
+}
+
+// Restore 获取收到的信息
+func (q *StarQueue) Restore() (MsgQueue, error) {
+	if q.duration.Seconds() == 0 {
+		q.duration = 86400 * time.Second
+	}
+	for {
+		select {
+		case <-q.ctx.Done():
+			return MsgQueue{}, errors.New("Stoped By External Function Call")
+		case <-time.After(q.duration):
+			if q.duration != 0 {
+				return MsgQueue{}, ErrDeadlineExceeded
+			}
+		case data, ok := <-q.msgPool:
+			if !ok {
+				return MsgQueue{}, os.ErrClosed
+			}
+			return data, nil
+		}
+	}
+}
+
+// RestoreOne 获取收到的一个信息
+// 兼容性修改
+func (q *StarQueue) RestoreOne() (MsgQueue, error) {
+	return q.Restore()
+}
+
+// Stop 立即停止Restore
+func (q *StarQueue) Stop() {
+	q.cancel()
+}
+
+// RestoreDuration Restore最大超时时间
+func (q *StarQueue) RestoreDuration(tm time.Duration) {
+	q.duration = tm
+}
+
+func (q *StarQueue) RestoreChan() <-chan MsgQueue {
+	return q.msgPool
+}

que_test.go

@@ -0,0 +1,42 @@
+package stario
+
+import (
+	"fmt"
+	"testing"
+	"time"
+)
+
+func Test_QueSpeed(t *testing.T) {
+	que := NewQueueWithCount(0)
+	stop := make(chan struct{}, 1)
+	que.RestoreDuration(time.Second * 10)
+	var count int64
+	go func() {
+		for {
+			select {
+			case <-stop:
+				//fmt.Println(count)
+				return
+			default:
+			}
+			_, err := que.RestoreOne()
+			if err == nil {
+				count++
+			}
+		}
+	}()
+	cp := 0
+	stoped := time.After(time.Second * 10)
+	data := que.BuildMessage([]byte("hello"))
+	for {
+		select {
+		case <-stoped:
+			fmt.Println(count, cp)
+			stop <- struct{}{}
+			return
+		default:
+			que.ParseMessage(data, "lala")
+			cp++
+		}
+	}
+}

signal_windows.go

@@ -0,0 +1,22 @@
+//go:build windows
+// +build windows
+
+package stario
+
+import (
+	"errors"
+)
+
+func signal(sigtype rune) error {
+	//todo: use win32api call signal
+	switch sigtype {
+	case 0x03:
+		return errors.New("SIGNAL SIGINT RECIVED")
+	case 0x1a:
+		return errors.New("SIGNAL SIGSTOP RECIVED")
+	case 0x1c:
+		return errors.New("SIGNAL SIGQUIT RECIVED")
+	default:
+		return nil
+	}
+}

singal_other.go

@@ -0,0 +1,26 @@
+//go:build !windows
+// +build !windows
+
+package stario
+
+import (
+	"errors"
+	"os"
+	"syscall"
+)
+
+func signal(sigtype rune) error {
+	switch sigtype {
+	case 0x03:
+		syscall.Kill(os.Getpid(), syscall.SIGINT)
+		return errors.New("SIGNAL SIGINT RECIVED")
+	case 0x1a:
+		syscall.Kill(os.Getpid(), syscall.SIGSTOP)
+		return errors.New("SIGNAL SIGSTOP RECIVED")
+	case 0x1c:
+		syscall.Kill(os.Getpid(), syscall.SIGQUIT)
+		return errors.New("SIGNAL SIGQUIT RECIVED")
+	default:
+		return nil
+	}
+}

sync.go

@@ -1,55 +1,142 @@
 package stario
 
 import (
+	"fmt"
 	"sync"
-	"sync/atomic"
-	"time"
+)
+
+type waitGroupAddMode uint8
+
+const (
+	waitGroupAddModeStrict waitGroupAddMode = iota
+	waitGroupAddModeLoose
 )
 
 type WaitGroup struct {
-	wg       *sync.WaitGroup
-	maxCount uint32
-	allCount uint32
+	wg       sync.WaitGroup
+	mu       sync.Mutex
+	cond     *sync.Cond
+	initOnce sync.Once
+	maxCount int
+	running  int
+	addMode  waitGroupAddMode
 }
 
 func NewWaitGroup(maxCount int) WaitGroup {
-	return WaitGroup{wg: &sync.WaitGroup{}, maxCount: uint32(maxCount)}
+	if maxCount < 0 {
+		panic("stario: negative max wait count")
+	}
+	return WaitGroup{
+		maxCount: maxCount,
+		addMode:  waitGroupAddModeStrict,
+	}
 }
 
-func (swg *WaitGroup) Add(delta int) {
-	var Udelta uint32
+func (w *WaitGroup) init() {
+	w.initOnce.Do(func() {
+		w.cond = sync.NewCond(&w.mu)
+	})
+}
+
+func (w *WaitGroup) Add(delta int) {
+	w.init()
+	if delta == 0 {
+		return
+	}
 	if delta < 0 {
-		Udelta = uint32(-delta - 1)
-	} else {
-		Udelta = uint32(delta)
+		w.release(-delta)
+		return
 	}
-	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
+	w.acquire(delta)
+}
+
+func (w *WaitGroup) acquire(delta int) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	if w.maxCount <= 0 {
+		w.running += delta
+		w.wg.Add(delta)
+		return
+	}
+	if delta == 1 {
+		w.wg.Add(1)
+		for w.maxCount > 0 && w.running >= w.maxCount {
+			w.cond.Wait()
 		}
-		time.Sleep(time.Microsecond)
+		w.running++
+		return
 	}
-	swg.wg.Add(delta)
+	if w.running+delta > w.maxCount {
+		if w.addMode == waitGroupAddModeStrict {
+			panic(fmt.Sprintf("stario: WaitGroup.Add(%d) exceeds max limit %d with %d running", delta, w.maxCount, w.running))
+		}
+		w.maxCount = w.running + delta
+	}
+	w.running += delta
+	w.wg.Add(delta)
 }
 
-func (swg *WaitGroup) Done() {
-	swg.Add(-1)
+func (w *WaitGroup) release(delta int) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	if delta > w.running {
+		panic(fmt.Sprintf("stario: WaitGroup.Done releases %d tasks but only %d running", delta, w.running))
+	}
+	w.wg.Add(-delta)
+	w.running -= delta
+	w.cond.Broadcast()
 }
 
-func (swg *WaitGroup) Wait() {
-	swg.wg.Wait()
+func (w *WaitGroup) Done() {
+	w.Add(-1)
 }
 
-func (swg *WaitGroup) GetMaxWaitNum() int {
-	return int(atomic.LoadUint32(&swg.maxCount))
+func (w *WaitGroup) Go(fn func()) {
+	w.Add(1)
+	go func() {
+		defer w.Done()
+		fn()
+	}()
 }
 
-func (swg *WaitGroup) SetMaxWaitNum(num int) {
-	atomic.AddUint32(&swg.maxCount, uint32(num))
+func (w *WaitGroup) Wait() {
+	w.init()
+	w.wg.Wait()
+}
+
+func (w *WaitGroup) GetMaxWaitNum() int {
+	w.init()
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	return w.maxCount
+}
+
+func (w *WaitGroup) SetMaxWaitNum(num int) {
+	if num < 0 {
+		panic("stario: negative max wait count")
+	}
+	w.init()
+	w.mu.Lock()
+	w.maxCount = num
+	w.mu.Unlock()
+	w.cond.Broadcast()
+}
+
+func (w *WaitGroup) SetStrictAddMode(strict bool) {
+	w.init()
+	w.mu.Lock()
+	if strict {
+		w.addMode = waitGroupAddModeStrict
+	} else {
+		w.addMode = waitGroupAddModeLoose
+	}
+	w.mu.Unlock()
+	w.cond.Broadcast()
+}
+
+func (w *WaitGroup) StrictAddMode() bool {
+	w.init()
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	return w.addMode == waitGroupAddModeStrict
 }

sync_test.go

@@ -0,0 +1,171 @@
+package stario
+
+import (
+	"testing"
+	"time"
+)
+
+func TestWaitGroupAddBlocksAtLimit(t *testing.T) {
+	wg := NewWaitGroup(1)
+	wg.Add(1)
+
+	unblocked := make(chan struct{})
+	go func() {
+		wg.Add(1)
+		close(unblocked)
+		wg.Done()
+	}()
+
+	select {
+	case <-unblocked:
+		t.Fatal("Add(1) should block while running count is at the limit")
+	case <-time.After(30 * time.Millisecond):
+	}
+
+	wg.Done()
+
+	select {
+	case <-unblocked:
+	case <-time.After(200 * time.Millisecond):
+		t.Fatal("Add(1) did not resume after capacity was released")
+	}
+
+	wg.Wait()
+}
+
+func TestWaitGroupStrictAddPanicsWhenBatchExceedsLimit(t *testing.T) {
+	wg := NewWaitGroup(1)
+	wg.Add(1)
+	defer wg.Done()
+
+	defer func() {
+		if recover() == nil {
+			t.Fatal("expected Add(2) to panic in strict mode when it exceeds the limit")
+		}
+	}()
+
+	wg.Add(2)
+}
+
+func TestWaitGroupLooseAddExpandsLimit(t *testing.T) {
+	wg := NewWaitGroup(1)
+	wg.SetStrictAddMode(false)
+
+	wg.Add(1)
+	wg.Add(2)
+
+	if got := wg.GetMaxWaitNum(); got != 3 {
+		t.Fatalf("unexpected max count: got %d want 3", got)
+	}
+
+	for i := 0; i < 3; i++ {
+		wg.Done()
+	}
+	wg.Wait()
+}
+
+func TestWaitGroupSetMaxWaitNumOverridesValue(t *testing.T) {
+	wg := NewWaitGroup(1)
+	wg.SetMaxWaitNum(4)
+	if got := wg.GetMaxWaitNum(); got != 4 {
+		t.Fatalf("unexpected max count: got %d want 4", got)
+	}
+}
+
+func TestWaitGroupSetMaxWaitNumZeroUnblocksWaitingAdd(t *testing.T) {
+	wg := NewWaitGroup(1)
+	wg.Add(1)
+
+	unblocked := make(chan struct{})
+	go func() {
+		wg.Add(1)
+		close(unblocked)
+		wg.Done()
+	}()
+
+	select {
+	case <-unblocked:
+		t.Fatal("Add(1) should still be blocked before removing the limit")
+	case <-time.After(30 * time.Millisecond):
+	}
+
+	wg.SetMaxWaitNum(0)
+
+	select {
+	case <-unblocked:
+	case <-time.After(200 * time.Millisecond):
+		t.Fatal("Add(1) did not resume after the limit was removed")
+	}
+
+	wg.Done()
+	wg.Wait()
+}
+
+func TestWaitGroupGoWaitsForCompletion(t *testing.T) {
+	wg := NewWaitGroup(1)
+	done := make(chan struct{})
+
+	wg.Go(func() {
+		close(done)
+	})
+
+	select {
+	case <-done:
+	case <-time.After(200 * time.Millisecond):
+		t.Fatal("Go(fn) did not run the function")
+	}
+
+	finished := make(chan struct{})
+	go func() {
+		wg.Wait()
+		close(finished)
+	}()
+
+	select {
+	case <-finished:
+	case <-time.After(200 * time.Millisecond):
+		t.Fatal("Wait did not observe Go(fn) completion")
+	}
+}
+
+func TestWaitGroupGoRespectsLimit(t *testing.T) {
+	wg := NewWaitGroup(1)
+	releaseFirst := make(chan struct{})
+	firstStarted := make(chan struct{})
+	secondStarted := make(chan struct{})
+	secondReturned := make(chan struct{})
+
+	wg.Go(func() {
+		close(firstStarted)
+		<-releaseFirst
+	})
+
+	select {
+	case <-firstStarted:
+	case <-time.After(200 * time.Millisecond):
+		t.Fatal("first Go(fn) did not start")
+	}
+
+	go func() {
+		wg.Go(func() {
+			close(secondStarted)
+		})
+		close(secondReturned)
+	}()
+
+	select {
+	case <-secondReturned:
+		t.Fatal("second Go(fn) should block while the limit is full")
+	case <-time.After(30 * time.Millisecond):
+	}
+
+	close(releaseFirst)
+
+	select {
+	case <-secondStarted:
+	case <-time.After(200 * time.Millisecond):
+		t.Fatal("second Go(fn) did not start after capacity was released")
+	}
+
+	wg.Wait()
+}