You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: worker_pool.go
    path of file: ./repos/1m-go-tcp-server/8_server_workerpool
    
    the code of the file until where you have to start completion: package main

import (
	"io"
	"log"
	"net"
	"sync"
)

type pool struct {
	workers   int
	maxTasks  int
	taskQueue chan net.Conn

	mu     sync.Mutex
	closed bool
	done   chan 
    
func handleConn(conn net.Conn) {
	_, err := io.CopyN(conn, conn, 8)
	if err != nil {
		if err := epoller.Remove(conn); err != nil {
			log.Printf("failed to remove %v", err)
		}
		conn.Close()
	}
	opsRate.Mark(1)
}