-
Notifications
You must be signed in to change notification settings - Fork 0
/
round_robin.go
56 lines (50 loc) · 1.11 KB
/
round_robin.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
package main
import (
"container/ring"
"log"
"sync"
"time"
)
type RoundRobin struct {
ring *ring.Ring
m sync.Mutex
}
func process(id int, funcs chan func()) {
for f := range funcs {
f()
log.Printf("Job finished in goroutine %d", id)
}
}
func NewRoundRobinScheduler(ringSize, channelSize int) *RoundRobin {
r := ring.New(ringSize)
for i := 0; i < ringSize; i++ {
c := make(chan func(), channelSize)
go process(i, c)
r.Value = c
r = r.Next()
}
return &RoundRobin{ring: r}
}
func (rr *RoundRobin) Submit(f func()) {
rr.m.Lock()
defer rr.m.Unlock()
c := rr.ring.Value.(chan func())
c <- f
rr.ring = rr.ring.Next()
}
func main() {
var wg sync.WaitGroup
rr := NewRoundRobinScheduler(4, 4)
for i := 0; i < 16; i++ {
wg.Add(1)
(func(id int) {
log.Printf("Submitted job %d", id)
rr.Submit(func() {
time.Sleep(3 * time.Second)
log.Printf("Hello from job %d", id)
wg.Done()
})
})(i)
}
wg.Wait()
}