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authorLars Hjemli <hjemli@gmail.com>2006-12-11 09:57:58 +0100
committerLars Hjemli <hjemli@gmail.com>2006-12-11 09:57:58 +0100
commitf5069d88dff7a7ed2f4665904b03e906cca75a7c (patch)
tree4c9bfa3aaf931af4a345ffb9563b19825c38b628 /cgit.c
parentAdd version identifier in generated files (diff)
downloadcgit-pink-f5069d88dff7a7ed2f4665904b03e906cca75a7c.tar.gz
cgit-pink-f5069d88dff7a7ed2f4665904b03e906cca75a7c.zip
Fix cache algorithm loophole
This closes the door for unneccessary calls to cgit_fill_cache().

Noticed by Linus.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Diffstat (limited to 'cgit.c')
-rw-r--r--cgit.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/cgit.c b/cgit.c
index 110face..7f14016 100644
--- a/cgit.c
+++ b/cgit.c
@@ -465,20 +465,20 @@ static void cgit_fill_cache(struct cacheitem *item)
 
 static void cgit_refresh_cache(struct cacheitem *item)
 {
+	cache_prepare(item);
  top:
-	if (!cache_lookup(item)) {
-		if (cache_lock(item)) {
-			cgit_fill_cache(item);
-			cache_unlock(item);
-		} else {
+	if (!cache_exist(item)) {
+		if (!cache_lock(item)) {
 			sched_yield();
 			goto top;
 		}
-	} else if (cache_expired(item)) {
-		if (cache_lock(item)) {
+		if (!cache_exist(item))
 			cgit_fill_cache(item);
-			cache_unlock(item);
-		}
+		cache_unlock(item);
+	} else if (cache_expired(item) && cache_lock(item)) {
+		if (cache_expired(item))
+			cgit_fill_cache(item);
+		cache_unlock(item);
 	}
 }