Enclosure

02-enclosure/main.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"fmt"
+	"runtime"
+	"sync"
+)
+
+var wg sync.WaitGroup
+
+func main() {
+	runtime.GOMAXPROCS(1) // Not needed
+
+	// Show I gets get reference by the go routine
+	var i = 10
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		for j := 0; j < 1000; j++ {
+			i = i + 1
+		}
+		fmt.Printf("Inside go routine i: %d\n", i)
+	}()
+
+	var k = 20
+	wg.Add(1)
+	go func(k int) {
+		defer wg.Done()
+		for j := 0; j < 1000; j++ {
+			k = k + 1
+		}
+		fmt.Printf("Inside go routine k: %d\n", k)
+	}(k)
+
+	// Danager Ahead two go routines accessing the same memory location at the same time
+	// semgrp looks for this condition DON'T do this!!!
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		for j := 0; j < 1000; j++ {
+			i = i + 1
+		}
+		fmt.Printf("Inside second go routine i: %d\n", i)
+	}()
+
+	wg.Wait()
+	fmt.Printf("Outside go routine i: %d\n", i)
+	fmt.Printf("Outside go routine k: %d\n", k)
+
+}