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115 lines
1.6 KiB
115 lines
1.6 KiB
package main
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import (
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"fmt"
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"io"
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"log"
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"math/rand"
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"net"
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"sync"
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"time"
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)
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var mu sync.Mutex
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type queue struct {
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size int
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load []int
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}
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func remove(s []int, i int) []int {
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copy(s[i:], s[i+1:])
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return s[:len(s)-1]
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}
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func work(q *queue) <-chan string {
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ch := make(chan string)
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go func() {
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for {
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mu.Lock()
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curLoad := len(q.load)
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mu.Unlock()
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if curLoad > 0 {
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mu.Lock()
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curValue := q.load[0]
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mu.Unlock()
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time.Sleep(time.Millisecond * time.Duration(curValue))
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mu.Lock()
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q.load = remove(q.load, 0)
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mu.Unlock()
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ch <- "finished"
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}
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}
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}()
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return ch
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}
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func load(q *queue) {
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go func() {
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for {
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time.Sleep(time.Millisecond * time.Duration(rand.Intn(1000)))
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mu.Lock()
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q.load = append(q.load, rand.Intn(1000))
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mu.Unlock()
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}
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}()
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}
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func printer(q *queue) {
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go func() {
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for {
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mu.Lock()
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fmt.Println(q)
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mu.Unlock()
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time.Sleep(time.Millisecond * 1000)
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}
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}()
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}
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func init() {
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rand.Seed(time.Now().UnixNano())
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}
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var q = queue{
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size: 10,
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}
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func main() {
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listener, err := net.Listen("tcp", "localhost:8080")
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if err != nil {
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log.Fatal(err)
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}
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go func() {
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for {
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conn, err := listener.Accept()
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if err != nil {
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log.Print(err)
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continue
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}
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handleConn(conn)
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}
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}()
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fmt.Println("here")
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load(&q)
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printer(&q)
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ch := work(&q)
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for {
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select {
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case <-ch:
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fmt.Println("finished something")
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}
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}
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}
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func handleConn(c net.Conn) {
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defer c.Close()
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for {
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mu.Lock()
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_, err := io.WriteString(c, fmt.Sprintf("%v\n", q))
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mu.Unlock()
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if err != nil {
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return
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}
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time.Sleep(time.Millisecond * 100)
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}
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}
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