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Source file test/chan/goroutines.go

Documentation: test/chan

     1  // run
     2  
     3  // Copyright 2009 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // Torture test for goroutines.
     8  // Make a lot of goroutines, threaded together, and tear them down cleanly.
     9  
    10  package main
    11  
    12  import (
    13  	"os"
    14  	"strconv"
    15  )
    16  
    17  func f(left, right chan int) {
    18  	left <- <-right
    19  }
    20  
    21  func main() {
    22  	var n = 10000
    23  	if len(os.Args) > 1 {
    24  		var err error
    25  		n, err = strconv.Atoi(os.Args[1])
    26  		if err != nil {
    27  			print("bad arg\n")
    28  			os.Exit(1)
    29  		}
    30  	}
    31  	leftmost := make(chan int)
    32  	right := leftmost
    33  	left := leftmost
    34  	for i := 0; i < n; i++ {
    35  		right = make(chan int)
    36  		go f(left, right)
    37  		left = right
    38  	}
    39  	go func(c chan int) { c <- 1 }(right)
    40  	<-leftmost
    41  }
    42  

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