add: 锁的使用

channel/mutex/basic/main.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+	"time"
+)
+
+type Sth struct {
+	x    int64
+	wg   sync.WaitGroup
+	lock sync.Mutex
+}
+
+func (s *Sth) add() {
+	for i := 0; i < 10000; i++ {
+		s.lock.Lock()
+		s.x++
+		s.lock.Unlock()
+	}
+	s.wg.Done()
+}
+
+func main() {
+	var s Sth
+	s.wg.Add(2)
+	go s.add()
+	go s.add()
+	s.wg.Wait()
+	fmt.Println(s)
+
+	time.Sleep(time.Second)
+	fmt.Println("xiaowei zhaodandan")
+}