From f5069d88dff7a7ed2f4665904b03e906cca75a7c Mon Sep 17 00:00:00 2001
From: Lars Hjemli
Date: Mon, 11 Dec 2006 09:57:58 +0100
Subject: 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>
---
cgit.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
(limited to 'cgit.c')
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);
}
}
--
cgit v1.2.3-54-g00ecf