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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
parent76827d8679d1d2bd46e8cddf7da2ce4178e1d676 (diff)
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);
}
}