From 04bac6ec20596b9758c22f6ae80c9af83bc6d852 Mon Sep 17 00:00:00 2001
From: liusong <1736912420@qq.com>
Date: Wed, 3 Nov 2021 18:21:13 +0800
Subject: [PATCH 1/2] use sync.map is better

---
 fs.go | 21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

diff --git a/fs.go b/fs.go
index f8d4add94c..812eef43be 100644
--- a/fs.go
+++ b/fs.go
@@ -1370,18 +1370,15 @@ func fsModTime(t time.Time) time.Time {
 	return t.In(time.UTC).Truncate(time.Second)
 }
 
-var (
-	filesLockMap     = make(map[string]*sync.Mutex)
-	filesLockMapLock sync.Mutex
-)
+var filesLockMap sync.Map
 
 func getFileLock(absPath string) *sync.Mutex {
-	filesLockMapLock.Lock()
-	flock := filesLockMap[absPath]
-	if flock == nil {
-		flock = &sync.Mutex{}
-		filesLockMap[absPath] = flock
-	}
-	filesLockMapLock.Unlock()
-	return flock
+	v, exist := filesLockMap.Load(absPath)
+	if exist == false {
+		flock := &sync.Mutex{}
+		filesLockMap.Store(absPath,flock)
+		return flock
+	}
+	filelock:=v.(*sync.Mutex)
+	return filelock
 }

From 918705ad37a92dabda899c7948ef69db5ed8a771 Mon Sep 17 00:00:00 2001
From: liusong <1736912420@qq.com>
Date: Thu, 4 Nov 2021 16:50:50 +0800
Subject: [PATCH 2/2] Use LoadOrStore

---
 fs.go | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/fs.go b/fs.go
index 812eef43be..147f315123 100644
--- a/fs.go
+++ b/fs.go
@@ -1373,12 +1373,7 @@ func fsModTime(t time.Time) time.Time {
 var filesLockMap sync.Map
 
 func getFileLock(absPath string) *sync.Mutex {
-	v, exist := filesLockMap.Load(absPath)
-	if exist == false {
-		flock := &sync.Mutex{}
-		filesLockMap.Store(absPath,flock)
-		return flock
-	}
+	v, _ := filesLockMap.LoadOrStore(absPath,&sync.Mutex{})
 	filelock:=v.(*sync.Mutex)
 	return filelock
 }