Initial commit (code only without large binaries)

EdgeNode/internal/utils/fs/stat.go

@@ -0,0 +1,35 @@
+// Copyright 2023 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package fsutils
+
+import (
+	"github.com/TeaOSLab/EdgeNode/internal/utils/fasttime"
+	"sync"
+)
+
+var locker = &sync.RWMutex{}
+var cacheMap = map[string]*StatResult{} // path => StatResult
+
+const cacheLife = 3 // seconds
+
+// StatDeviceCache stat device with cache
+func StatDeviceCache(path string) (*StatResult, error) {
+	locker.RLock()
+	stat, ok := cacheMap[path]
+	if ok && stat.updatedAt >= fasttime.Now().Unix()-cacheLife {
+		locker.RUnlock()
+		return stat, nil
+	}
+	locker.RUnlock()
+
+	locker.Lock()
+	defer locker.Unlock()
+
+	stat, err := StatDevice(path)
+	if err != nil {
+		return nil, err
+	}
+
+	cacheMap[path] = stat
+	return stat, nil
+}