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reactor_sub.go
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reactor_sub.go
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//go:build linux || freebsd || dragonfly || darwin
// +build linux freebsd dragonfly darwin
package wknet
import (
"bytes"
"fmt"
"os"
"github.com/WuKongIM/WuKongIM/pkg/wklog"
"github.com/WuKongIM/WuKongIM/pkg/wknet/netpoll"
"go.uber.org/atomic"
"go.uber.org/zap"
"golang.org/x/sys/unix"
)
// ReactorSub is a sub reactor.
type ReactorSub struct {
poller *netpoll.Poller
eg *Engine
idx int // index of the current sub reactor
connCount atomic.Int32
wklog.Log
ReadBuffer []byte
cache bytes.Buffer // temporary buffer for scattered bytes
stopped atomic.Bool
}
// NewReactorSub instantiates a sub reactor.
func NewReactorSub(eg *Engine, index int) *ReactorSub {
poller := netpoll.NewPoller(index, "connPoller")
return &ReactorSub{
eg: eg,
poller: poller,
idx: index,
Log: wklog.NewWKLog(fmt.Sprintf("ReactorSub-%d", index)),
ReadBuffer: make([]byte, eg.options.ReadBufferSize),
}
}
// AddConn adds a connection to the sub reactor.
func (r *ReactorSub) AddConn(conn Conn) error {
r.eg.AddConn(conn)
r.connCount.Inc()
return r.poller.AddRead(conn.Fd().fd)
}
// Start starts the sub reactor.
func (r *ReactorSub) Start() error {
go r.run()
return nil
}
// Stop stops the sub reactor.
func (r *ReactorSub) Stop() error {
r.stopped.Store(true)
return r.poller.Close()
}
func (r *ReactorSub) AddWrite(conn Conn) error {
return r.poller.AddWrite(conn.Fd().fd)
}
func (r *ReactorSub) AddRead(conn Conn) error {
return r.poller.AddRead(conn.Fd().fd)
}
func (r *ReactorSub) RemoveWrite(conn Conn) error {
return r.poller.DeleteWrite(conn.Fd().fd)
}
func (r *ReactorSub) RemoveRead(conn Conn) error {
return r.poller.DeleteRead(conn.Fd().fd)
}
func (r *ReactorSub) RemoveReadAndWrite(conn Conn) error {
return r.poller.DeleteReadAndWrite(conn.Fd().fd)
}
func (r *ReactorSub) DeleteFd(conn Conn) error {
return r.poller.Delete(conn.Fd().fd)
}
func (r *ReactorSub) ConnInc() {
r.connCount.Inc()
}
func (r *ReactorSub) ConnDec() {
r.connCount.Dec()
}
func (r *ReactorSub) run() {
err := r.poller.Polling(func(fd int, event netpoll.PollEvent) (err error) {
conn := r.eg.GetConn(fd)
if conn == nil {
return nil
}
switch event {
case netpoll.PollEventClose:
r.Debug("conn 连接关闭!", zap.Int64("id", conn.ID()), zap.Int("fd", fd))
_ = r.CloseConn(conn, unix.ECONNRESET)
case netpoll.PollEventRead:
err = r.read(conn)
case netpoll.PollEventWrite:
err = r.write(conn)
}
return
})
if err != nil && !r.stopped.Load() {
panic(err)
}
}
func (r *ReactorSub) CloseConn(c Conn, er error) (rerr error) {
r.Debug("connection error", zap.Error(er), zap.Int64("id", c.ID()), zap.Int("fd", c.Fd().fd))
return c.CloseWithErr(er)
}
func (r *ReactorSub) read(c Conn) error {
var err error
var n int
if n, err = c.ReadToInboundBuffer(); err != nil {
if err == unix.EAGAIN {
return nil
}
if err1 := r.CloseConn(c, err); err1 != nil {
r.Warn("failed to close conn", zap.Error(err1))
}
return nil
}
if n == 0 {
return r.CloseConn(c, os.NewSyscallError("read", unix.ECONNRESET))
}
if err = r.eg.eventHandler.OnData(c); err != nil {
if err == unix.EAGAIN {
return nil
}
if err1 := r.CloseConn(c, err); err1 != nil {
r.Warn("failed to close conn", zap.Error(err1))
}
r.Warn("failed to call OnData", zap.Error(err))
return nil
}
return nil
}
func (r *ReactorSub) write(c Conn) error {
err := c.Flush()
switch err {
case nil:
case unix.EAGAIN:
return nil
default:
return r.CloseConn(c, os.NewSyscallError("write", err))
}
return nil
}