lib9p

commit 0ae61060daf180ba25305eea7b3cc1edf5075c29
parent d30dbb4f7fa09e657772ecd84423b33968584f7c
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Sat,  4 Nov 2023 08:31:56 +0900

modify semFS to use map instead of slice

Diffstat:
M
cmd/semfs/fs.go
 | 
10
++++++----
M
cmd/semfs/main.go
 | 
2
+-

2 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/cmd/semfs/fs.go b/cmd/semfs/fs.go
@@ -14,7 +14,8 @@ import (
 )
 
 type semFS struct {
-	semfiles []*semFile
+	semfiles map[int]*semFile
+	lastpath int
 }
 
 func (fsys *semFS) OpenFile(name string, omode lib9p.OpenMode, perm fs.FileMode) (lib9p.File, error) {
@@ -62,11 +63,12 @@ func (root *semFS) Create(name string, uid string, mode lib9p.OpenMode, perm lib
 		fs:     root,
 		name:   name,
 		sem:    0,
-		path:   uint64(len(root.semfiles) + 1),
+		path:   uint64(root.lastpath+1),
 		cancel: cancel,
 	}
 	newfile.start(ctx)
-	root.semfiles = append(root.semfiles, newfile)
+	root.semfiles[root.lastpath+1] = newfile
+	root.lastpath++
 	return newfile, nil
 }
 
@@ -175,6 +177,6 @@ func (f *semFile) Remove() error {
 	f.cancel()
 	close(f.rchan)
 	close(f.wchan)
-	f.fs.semfiles[f.path-1] = nil
+	delete(f.fs.semfiles, int(f.path))
 	return nil
 }
diff --git a/cmd/semfs/main.go b/cmd/semfs/main.go
@@ -23,7 +23,7 @@ func main() {
 	if err != nil {
 		log.Fatalf("listen tcp: %v", err)
 	}
-	fsys := new(semFS)
+	fsys := &semFS{semfiles: make(map[int]*semFile)}
 	for {
 		conn, err := listener.Accept()
 		if err != nil {