From 10e9ef931bd1f037192a760f566f5bbd8e900f2b Mon Sep 17 00:00:00 2001
From: Jian Han <jianhan@mail.com>
Date: Sat, 28 Apr 2018 14:08:44 +1000
Subject: [PATCH] list thread

---
 master_concurrent_go/ch01/main.go | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/master_concurrent_go/ch01/main.go b/master_concurrent_go/ch01/main.go
index 1ab765d..38df850 100644
--- a/master_concurrent_go/ch01/main.go
+++ b/master_concurrent_go/ch01/main.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"runtime"
+	"strconv"
 	"time"
 )
 
@@ -39,17 +40,24 @@ func main() {
 	go outputText(hello)
 	go outputText(world)
 	goSched()
+	runtime.GOMAXPROCS(2)
+	fmt.Printf("%d thread(s) available to Go.", listThreads())
 }
 
 func goSched() {
 	iterations := 10
 	for i := 0; i <= iterations; i++ {
-		go showNumber(i)
+		showNumber(i)
 	}
-	runtime.Gosched()
 	fmt.Println("Goodbye!")
 }
 
 func showNumber(num int) {
-	fmt.Println(num)
+	tstamp := strconv.FormatInt(time.Now().UnixNano(), 10)
+	fmt.Println(num, tstamp)
+}
+
+func listThreads() int {
+	threads := runtime.GOMAXPROCS(0)
+	return threads
 }