From 6f93f4eba94c4962b056987b430a34d3339c53ea Mon Sep 17 00:00:00 2001
From: Aaron Jacobs <jacobsa@google.com>
Date: Mon, 2 Mar 2015 14:14:02 +1100
Subject: [PATCH] Implemented NewMemFS.

---
 samples/memfs/fs.go | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/samples/memfs/fs.go b/samples/memfs/fs.go
index 0feac15..95524b6 100644
--- a/samples/memfs/fs.go
+++ b/samples/memfs/fs.go
@@ -44,6 +44,15 @@ type memFS struct {
 
 // Create a file system that stores data and metadata in memory.
 func NewMemFS(
-	clock timeutil.Clock) fuse.FileSystem {
-	panic("TODO(jacobsa): Implement NewMemFS.")
+	clock timeutil.Clock) (fs fuse.FileSystem) {
+	fs = &memFS{
+		clock: clock,
+	}
+
+	fs.(*memFS).mu = syncutil.NewInvariantMutex(fs.(*memFS).checkInvariants)
+	return
+}
+
+func (fs *memFS) checkInvariants() {
+	panic("TODO")
 }