perf: server.Conn 写循环更改为采用无界缓冲区的写入，优化整体逻辑

server/conn.go

@@ -2,11 +2,16 @@ package server
 
 import (
 	"context"
+	"errors"
+	"fmt"
 	"github.com/gorilla/websocket"
+	"github.com/kercylan98/minotaur/server/writeloop"
 	"github.com/kercylan98/minotaur/utils/concurrent"
+	"github.com/kercylan98/minotaur/utils/log"
 	"github.com/panjf2000/gnet"
 	"github.com/xtaci/kcp-go/v5"
 	"net"
+	"runtime/debug"
 	"strings"
 	"sync"
 )
@@ -16,7 +21,6 @@ func newKcpConn(server *Server, session *kcp.UDPSession) *Conn {
 	c := &Conn{
 		ctx: server.ctx,
 		connection: &connection{
-			packets:    make(chan *connPacket, DefaultConnectionChannelSize),
 			server:     server,
 			remoteAddr: session.RemoteAddr(),
 			ip:         session.RemoteAddr().String(),
@@ -27,10 +31,7 @@ func newKcpConn(server *Server, session *kcp.UDPSession) *Conn {
 	if index := strings.LastIndex(c.ip, ":"); index != -1 {
 		c.ip = c.ip[0:index]
 	}
-	var wait = new(sync.WaitGroup)
-	wait.Add(1)
-	go c.writeLoop(wait)
-	wait.Wait()
+	c.writeLoop()
 	return c
 }
 
@@ -39,7 +40,6 @@ func newGNetConn(server *Server, conn gnet.Conn) *Conn {
 	c := &Conn{
 		ctx: server.ctx,
 		connection: &connection{
-			packets:    make(chan *connPacket, DefaultConnectionChannelSize),
 			server:     server,
 			remoteAddr: conn.RemoteAddr(),
 			ip:         conn.RemoteAddr().String(),
@@ -50,10 +50,7 @@ func newGNetConn(server *Server, conn gnet.Conn) *Conn {
 	if index := strings.LastIndex(c.ip, ":"); index != -1 {
 		c.ip = c.ip[0:index]
 	}
-	var wait = new(sync.WaitGroup)
-	wait.Add(1)
-	go c.writeLoop(wait)
-	wait.Wait()
+	c.writeLoop()
 	return c
 }
 
@@ -62,7 +59,6 @@ func newWebsocketConn(server *Server, ws *websocket.Conn, ip string) *Conn {
 	c := &Conn{
 		ctx: server.ctx,
 		connection: &connection{
-			packets:    make(chan *connPacket, DefaultConnectionChannelSize),
 			server:     server,
 			remoteAddr: ws.RemoteAddr(),
 			ip:         ip,
@@ -70,10 +66,7 @@ func newWebsocketConn(server *Server, ws *websocket.Conn, ip string) *Conn {
 			data:       map[any]any{},
 		},
 	}
-	var wait = new(sync.WaitGroup)
-	wait.Add(1)
-	go c.writeLoop(wait)
-	wait.Wait()
+	c.writeLoop()
 	return c
 }
 
@@ -82,7 +75,6 @@ func newGatewayConn(conn *Conn, connId string) *Conn {
 	c := &Conn{
 		//ctx: server.ctx,
 		connection: &connection{
-			packets: make(chan *connPacket, DefaultConnectionChannelSize),
 			server: conn.server,
 			data:   map[any]any{},
 		},
@@ -98,17 +90,13 @@ func NewEmptyConn(server *Server) *Conn {
 	c := &Conn{
 		ctx: server.ctx,
 		connection: &connection{
-			packets:    make(chan *connPacket, DefaultConnectionChannelSize),
 			server:     server,
 			remoteAddr: &net.TCPAddr{},
 			ip:         "0.0.0.0:0",
 			data:       map[any]any{},
 		},
 	}
-	var wait = new(sync.WaitGroup)
-	wait.Add(1)
-	go c.writeLoop(wait)
-	wait.Wait()
+	c.writeLoop()
 	return c
 }
 
@@ -121,9 +109,6 @@ type Conn struct {
 // connection 长久保持的连接
 type connection struct {
 	server     *Server
-	close      sync.Once
-	closed     bool
-	closeL     sync.Mutex
 	remoteAddr net.Addr
 	ip         string
 	ws         *websocket.Conn
@@ -131,8 +116,10 @@ type connection struct {
 	kcp        *kcp.UDPSession
 	gw         func(packet []byte)
 	data       map[any]any
-	packetPool *concurrent.Pool[*connPacket]
-	packets    chan *connPacket
+	closed     bool
+	pool       *concurrent.Pool[*connPacket]
+	loop       *writeloop.WriteLoop[*connPacket]
+	mu         sync.Mutex
 }
 
 // IsEmpty 是否是空连接
@@ -158,6 +145,8 @@ func (slf *Conn) GetIP() string {
 
 // IsClosed 是否已经关闭
 func (slf *Conn) IsClosed() bool {
+	slf.mu.Lock()
+	defer slf.mu.Unlock()
 	return slf.closed
 }
 
@@ -216,23 +205,23 @@ func (slf *Conn) Write(packet []byte, callback ...func(err error)) {
 		return
 	}
 	packet = slf.server.OnConnectionWritePacketBeforeEvent(slf, packet)
-	slf.closeL.Lock()
-	defer slf.closeL.Unlock()
-	if slf.packetPool == nil || slf.packets == nil {
+	slf.mu.Lock()
+	defer slf.mu.Unlock()
+	if slf.closed {
 		return
 	}
-	cp := slf.packetPool.Get()
+	cp := slf.pool.Get()
 	cp.wst = slf.GetWST()
 	cp.packet = packet
 	if len(callback) > 0 {
 		cp.callback = callback[0]
 	}
-	slf.packets <- cp
+	slf.loop.Put(cp)
 }
 
 // writeLoop 写循环
-func (slf *Conn) writeLoop(wait *sync.WaitGroup) {
-	slf.packetPool = concurrent.NewPool[*connPacket](10*1024,
+func (slf *Conn) writeLoop() {
+	slf.pool = concurrent.NewPool[*connPacket](10*1024,
 		func() *connPacket {
 			return &connPacket{}
 		}, func(data *connPacket) {
@@ -241,21 +230,7 @@ func (slf *Conn) writeLoop(wait *sync.WaitGroup) {
 			data.callback = nil
 		},
 	)
-	defer func() {
-		if err := recover(); err != nil {
-			slf.Close()
-			slf.packets = nil
-		}
-	}()
-	wait.Done()
-	for {
-		packet, ok := <-slf.packets
-		if !ok {
-			slf.packets = nil
-			break
-		}
-
-		data := packet
+	slf.loop = writeloop.NewWriteLoop[*connPacket](slf.pool, func(data *connPacket) error {
 		var err error
 		if slf.IsWebsocket() {
 			err = slf.ws.WriteMessage(data.wst, data.packet)
@@ -271,24 +246,29 @@ func (slf *Conn) writeLoop(wait *sync.WaitGroup) {
 				_, err = slf.kcp.Write(data.packet)
 			}
 		}
-		callback := data.callback
-		slf.closeL.Lock()
-		slf.packetPool.Release(data)
-		slf.closeL.Unlock()
-		if callback != nil {
-			callback(err)
-		}
-		if err != nil {
-			panic(err)
-		}
+		if data.callback != nil {
+			data.callback(err)
 		}
+		return err
+	}, func(err any) {
+		slf.Close(errors.New(fmt.Sprint(err)))
+	})
 }
 
 // Close 关闭连接
 func (slf *Conn) Close(err ...error) {
-	slf.close.Do(func() {
-		slf.closeL.Lock()
-		defer slf.closeL.Unlock()
+	slf.mu.Lock()
+	if slf.closed {
+		slf.mu.Unlock()
+		return
+	}
+	defer func() {
+		if err := recover(); err != nil {
+			log.Error("Conn.Close", log.String("State", "Panic"), log.Any("Error", err))
+			debug.PrintStack()
+			slf.mu.Unlock()
+		}
+	}()
 	slf.closed = true
 	if slf.ws != nil {
 		_ = slf.ws.Close()
@@ -297,17 +277,12 @@ func (slf *Conn) Close(err ...error) {
 	} else if slf.kcp != nil {
 		_ = slf.kcp.Close()
 	}
-		if slf.packetPool != nil {
-			slf.packetPool.Close()
-		}
-		slf.packetPool = nil
-		if slf.packets != nil {
-			close(slf.packets)
-		}
+	slf.pool.Close()
+	slf.loop.Close()
+	slf.mu.Unlock()
 	if len(err) > 0 {
 		slf.server.OnConnectionClosedEvent(slf, err[0])
 		return
 	}
 	slf.server.OnConnectionClosedEvent(slf, nil)
-	})
 }