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This commit is contained in:
Loic Nageleisen 2015-12-15 13:50:57 +01:00
parent 06273c3525
commit aa3bb21334
2 changed files with 35 additions and 0 deletions
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28
foo.go Normal file
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package main
import (
"fmt"
"sync"
)
func main() {
c := make(chan string, 5)
w := sync.WaitGroup{}
w.Add(1); go func() { v, ok := <-c; fmt.Printf("done %s %t\n", v, ok); w.Done() }()
w.Add(1); go func() { v, ok := <-c; fmt.Printf("done %s %t\n", v, ok); w.Done() }()
w.Add(1); go func() { v, ok := <-c; fmt.Printf("done %s %t\n", v, ok); w.Done() }()
c<-"foo"
//c<-"foo"
//c<-"foo"
//c<-"foo"
//c<-"foo"
//c<-"foo"
close(c)
fmt.Println("closed")
w.Add(1); go func() { v, ok := <-c; fmt.Printf("done %s %t\n", v, ok); w.Done() }()
w.Add(1); go func() { v, ok := <-c; fmt.Printf("done %s %t\n", v, ok); w.Done() }()
w.Add(1); go func() { v, ok := <-c; fmt.Printf("done %s %t\n", v, ok); w.Done() }()
w.Add(1); go func() { v, ok := <-c; fmt.Printf("done %s %t\n", v, ok); w.Done() }()
w.Add(1); go func() { v, ok := <-c; fmt.Printf("done %s %t\n", v, ok); w.Done() }()
w.Wait()
}

7
foo2.go Normal file
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package main
func main() {
c := make(chan string, 1)
c<-"foo"
<-c
}