From a8496afb3502b002fc76336395a87af70b4e742c Mon Sep 17 00:00:00 2001
From: xiaowei <403828237@qq.com>
Date: Sun, 13 Feb 2022 14:13:10 +0800
Subject: [PATCH] =?UTF-8?q?add:=20=E9=94=81=E7=9A=84=E4=BD=BF=E7=94=A8?=
MIME-Version: 1.0
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---
 channel/mutex/basic/main.go  | 34 ++++++++++++++++++++++++++
 channel/mutex/rwlock/main.go | 47 ++++++++++++++++++++++++++++++++++++
 2 files changed, 81 insertions(+)
 create mode 100644 channel/mutex/basic/main.go
 create mode 100644 channel/mutex/rwlock/main.go

diff --git a/channel/mutex/basic/main.go b/channel/mutex/basic/main.go
new file mode 100644
index 0000000..e8735b7
--- /dev/null
+++ b/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")
+}
diff --git a/channel/mutex/rwlock/main.go b/channel/mutex/rwlock/main.go
new file mode 100644
index 0000000..3668fbf
--- /dev/null
+++ b/channel/mutex/rwlock/main.go
@@ -0,0 +1,47 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+	"time"
+)
+
+var (
+	x      int64
+	wg     sync.WaitGroup
+	rwlock sync.RWMutex
+	lock   sync.Mutex
+)
+
+func main() {
+	start := time.Now()
+	for i := 0; i < 10; i++ {
+		wg.Add(1)
+		go write()
+	}
+	for i := 0; i < 100; i++ {
+		wg.Add(1)
+		go read()
+	}
+	wg.Wait()
+	fmt.Println("cost:", time.Since(start))
+}
+
+func read() {
+	//lock.Lock()
+	rwlock.RLock()
+	time.Sleep(time.Millisecond)
+	//lock.Unlock()
+	rwlock.RUnlock()
+	wg.Done()
+}
+
+func write() {
+	rwlock.Lock()
+	//lock.Lock()
+	x = x + 1
+	time.Sleep(10 * time.Millisecond)
+	//lock.Unlock()
+	rwlock.Unlock()
+	wg.Done()
+}