Use new atomic types from Go 1.19

conn.go

@@ -77,7 +77,7 @@ type Conn struct {
 	closeMu sync.Mutex
 	closing bool
 
-	pingCounter   int32
+	pingCounter   atomic.Int32
 	activePingsMu sync.Mutex
 	activePings   map[string]chan<- struct{}
 }
@@ -200,7 +200,7 @@ func (c *Conn) flate() bool {
 //
 // TCP Keepalives should suffice for most use cases.
 func (c *Conn) Ping(ctx context.Context) error {
-	p := atomic.AddInt32(&c.pingCounter, 1)
+	p := c.pingCounter.Add(1)
 
 	err := c.ping(ctx, strconv.Itoa(int(p)))
 	if err != nil {

netconn.go

@@ -68,7 +68,7 @@ func NetConn(ctx context.Context, c *Conn, msgType MessageType) net.Conn {
 		defer nc.writeMu.unlock()
 
 		// Prevents future writes from writing until the deadline is reset.
-		atomic.StoreInt64(&nc.writeExpired, 1)
+		nc.writeExpired.Store(1)
 	})
 	if !nc.writeTimer.Stop() {
 		<-nc.writeTimer.C
@@ -84,7 +84,7 @@ func NetConn(ctx context.Context, c *Conn, msgType MessageType) net.Conn {
 		defer nc.readMu.unlock()
 
 		// Prevents future reads from reading until the deadline is reset.
-		atomic.StoreInt64(&nc.readExpired, 1)
+		nc.readExpired.Store(1)
 	})
 	if !nc.readTimer.Stop() {
 		<-nc.readTimer.C
@@ -94,25 +94,22 @@ func NetConn(ctx context.Context, c *Conn, msgType MessageType) net.Conn {
 }
 
 type netConn struct {
-	// These must be first to be aligned on 32 bit platforms.
-	// https://github.com/nhooyr/websocket/pull/438
-	readExpired  int64
-	writeExpired int64
-
 	c       *Conn
 	msgType MessageType
 
-	writeTimer  *time.Timer
-	writeMu     *mu
-	writeCtx    context.Context
-	writeCancel context.CancelFunc
-
-	readTimer  *time.Timer
-	readMu     *mu
-	readCtx    context.Context
-	readCancel context.CancelFunc
-	readEOFed  bool
-	reader     io.Reader
+	writeTimer   *time.Timer
+	writeMu      *mu
+	writeExpired atomic.Int64
+	writeCtx     context.Context
+	writeCancel  context.CancelFunc
+
+	readTimer   *time.Timer
+	readMu      *mu
+	readExpired atomic.Int64
+	readCtx     context.Context
+	readCancel  context.CancelFunc
+	readEOFed   bool
+	reader      io.Reader
 }
 
 var _ net.Conn = &netConn{}
@@ -129,7 +126,7 @@ func (nc *netConn) Write(p []byte) (int, error) {
 	nc.writeMu.forceLock()
 	defer nc.writeMu.unlock()
 
-	if atomic.LoadInt64(&nc.writeExpired) == 1 {
+	if nc.writeExpired.Load() == 1 {
 		return 0, fmt.Errorf("failed to write: %w", context.DeadlineExceeded)
 	}
 
@@ -157,7 +154,7 @@ func (nc *netConn) Read(p []byte) (int, error) {
 }
 
 func (nc *netConn) read(p []byte) (int, error) {
-	if atomic.LoadInt64(&nc.readExpired) == 1 {
+	if nc.readExpired.Load() == 1 {
 		return 0, fmt.Errorf("failed to read: %w", context.DeadlineExceeded)
 	}
 
@@ -209,7 +206,7 @@ func (nc *netConn) SetDeadline(t time.Time) error {
 }
 
 func (nc *netConn) SetWriteDeadline(t time.Time) error {
-	atomic.StoreInt64(&nc.writeExpired, 0)
+	nc.writeExpired.Store(0)
 	if t.IsZero() {
 		nc.writeTimer.Stop()
 	} else {
@@ -223,7 +220,7 @@ func (nc *netConn) SetWriteDeadline(t time.Time) error {
 }
 
 func (nc *netConn) SetReadDeadline(t time.Time) error {
-	atomic.StoreInt64(&nc.readExpired, 0)
+	nc.readExpired.Store(0)
 	if t.IsZero() {
 		nc.readTimer.Stop()
 	} else {

read.go

@@ -11,11 +11,11 @@ import (
 	"io"
 	"net"
 	"strings"
+	"sync/atomic"
 	"time"
 
 	"nhooyr.io/websocket/internal/errd"
 	"nhooyr.io/websocket/internal/util"
-	"nhooyr.io/websocket/internal/xsync"
 )
 
 // Reader reads from the connection until there is a WebSocket
@@ -465,7 +465,7 @@ func (mr *msgReader) read(p []byte) (int, error) {
 type limitReader struct {
 	c     *Conn
 	r     io.Reader
-	limit xsync.Int64
+	limit atomic.Int64
 	n     int64
 }
 

ws_js.go

@@ -12,11 +12,11 @@ import (
 	"runtime"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"syscall/js"
 
 	"nhooyr.io/websocket/internal/bpool"
 	"nhooyr.io/websocket/internal/wsjs"
-	"nhooyr.io/websocket/internal/xsync"
 )
 
 // opcode represents a WebSocket opcode.
@@ -45,7 +45,7 @@ type Conn struct {
 	ws     wsjs.WebSocket
 
 	// read limit for a message in bytes.
-	msgReadLimit xsync.Int64
+	msgReadLimit atomic.Int64
 
 	closeReadMu  sync.Mutex
 	closeReadCtx context.Context