From: Diogo Franco (Kovensky) <diogomfranco@gmail.com>
Date: Wed, 17 Jul 2013 03:11:45 +0000 (-0300)
Subject: Add (*CacheDir).Chtime and (*CacheDir).ChtimeNoLock
X-Git-Tag: v0.0.1~2
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=9c42224433ac2b0cf65af518a66c4c747fef964a;p=go-fscache.git

Add (*CacheDir).Chtime and (*CacheDir).ChtimeNoLock

ChtimeNoLock is exported since it might be useful if the user already
called (*CacheDir).Lock.
---

diff --git a/cachestat.go b/cachestat.go
index a714829..f726c59 100755
--- a/cachestat.go
+++ b/cachestat.go
@@ -37,7 +37,7 @@ func (cd *CacheDir) Touch(key ...CacheKey) (err error) {
 		return
 	}
 
-	if err = os.Chtimes(cd.cachePath(key...), time.Now(), time.Now()); err == nil {
+	if err = cd.ChtimeNoLock(time.Now(), key...); err == nil {
 		return
 	}
 
@@ -55,3 +55,20 @@ func (cd *CacheDir) Touch(key ...CacheKey) (err error) {
 	}
 	return fh.Close()
 }
+
+// Same as Chtime, but does not try to acquire a file lock on the file
+// before. Only call this if you already hold a lock to the file.
+func (cd *CacheDir) ChtimeNoLock(t time.Time, key ...CacheKey) (err error) {
+	return os.Chtimes(cd.cachePath(key...), time.Now(), t)
+}
+
+// Sets the mtime of the file backing the given key to the specified time.
+func (cd *CacheDir) Chtime(t time.Time, key ...CacheKey) (err error) {
+	lock, err := cd.Lock(key...)
+	if err != nil {
+		return
+	}
+	defer lock.Unlock()
+
+	return cd.ChtimeNoLock(t, key...)
+}