Initial commit (code only without large binaries)

EdgeNode/internal/caches/open_file.go

@@ -0,0 +1,36 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package caches
+
+import (
+	"io"
+	"os"
+)
+
+type OpenFile struct {
+	fp      *os.File
+	meta    []byte
+	header  []byte
+	version int64
+	size    int64
+}
+
+func NewOpenFile(fp *os.File, meta []byte, header []byte, version int64, size int64) *OpenFile {
+	return &OpenFile{
+		fp:      fp,
+		meta:    meta,
+		header:  header,
+		version: version,
+		size:    size,
+	}
+}
+
+func (this *OpenFile) SeekStart() error {
+	_, err := this.fp.Seek(0, io.SeekStart)
+	return err
+}
+
+func (this *OpenFile) Close() error {
+	this.meta = nil
+	return this.fp.Close()
+}