From aac79b49972982fa26e2794dfcfcb54fb2d07909 Mon Sep 17 00:00:00 2001
From: charlie <3140647@qq.com>
Date: Tue, 10 May 2022 15:08:29 +0800
Subject: [PATCH] locker

---
 locker/empty_locker.go | 15 +++++++++++++++
 locker/locker.go       | 21 +++++++++++++++++++++
 2 files changed, 36 insertions(+)
 create mode 100644 locker/empty_locker.go
 create mode 100644 locker/locker.go

diff --git a/locker/empty_locker.go b/locker/empty_locker.go
new file mode 100644
index 0000000..b29d55e
--- /dev/null
+++ b/locker/empty_locker.go
@@ -0,0 +1,15 @@
+package locker
+
+import "sync"
+
+var _ sync.Locker = &emptyLocker{}
+
+type emptyLocker struct{}
+
+func NewEmptyLocker() *emptyLocker {
+	return &emptyLocker{}
+}
+
+func (l *emptyLocker) Lock() {}
+
+func (l *emptyLocker) Unlock() {}
diff --git a/locker/locker.go b/locker/locker.go
new file mode 100644
index 0000000..82d214a
--- /dev/null
+++ b/locker/locker.go
@@ -0,0 +1,21 @@
+package locker
+
+import "sync"
+
+var locks = make(map[string]sync.Locker)
+
+func Lock(name string) {
+	if l, ok := locks[name]; ok {
+		l.Lock()
+	}
+
+	new := &sync.Mutex{}
+	locks[name] = new
+	new.Lock()
+}
+
+func Unlock(name string) {
+	if l, ok := locks[name]; ok {
+		l.Unlock()
+	}
+}