Go语言并发例子

package main

import (
	"fmt"
	"runtime"
)

func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())
	c := make(chan bool, 10)
	for i := 0; i < 10; i++ {
		go Go(c, i)
	}
	for i := 0; i < 10; i++ {
		<-c
	}
}

func Go(c chan bool, index int) {
	a := 1
	for i := 0; i < 100; i++ {
		a += i
	}

	fmt.Println(index, a)
	c <- true
}

package main

import (
	"fmt"
	"runtime"
	"sync"
)

func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())
	wg := sync.WaitGroup{}
	wg.Add(10)

	for i := 0; i < 10; i++ {
		go Go(&wg, i)
	}
	wg.Wait()
}

func Go(wg *sync.WaitGroup, index int) {
	a := 1
	for i := 0; i < 100; i++ {
		a += i
	}

	fmt.Println(index, a)
	wg.Done()
}

package main

import (
	"fmt"
)

func main() {
	c := make(chan int)

	go func() {
		for v := range c {
			fmt.Println(v)
		}
	}()
	for {

		select {
		case c <- 0:
		case c <- 1:
		}
	}

}

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