From d61350291204992c600c6bf944cae02f406d2c20 Mon Sep 17 00:00:00 2001
From: halst <liu-song@users.noreply.github.com>
Date: Thu, 4 Nov 2021 20:01:58 +0800
Subject: [PATCH] use sync.map is better (#1145)

* use sync.map is better

* Use LoadOrStore
---
 fs.go | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/fs.go b/fs.go
index f8d4add94c..147f315123 100644
--- a/fs.go
+++ b/fs.go
@@ -1370,18 +1370,10 @@ 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, _ := filesLockMap.LoadOrStore(absPath,&sync.Mutex{})
+	filelock:=v.(*sync.Mutex)
+	return filelock
 }