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guard all access to item.promotions

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This commit is contained in:
Karl Seguin 2014-12-28 10:35:20 +07:00
parent c75dcd4c12
commit 557d56ec6f
1 changed files with 3 additions and 3 deletions
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6
cache.go
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@ -155,7 +155,7 @@ func (c *Cache) worker() {
case item := <-c.deletables:
atomic.AddInt64(&c.size, -item.size)
if item.element == nil {
item.promotions = -2
atomic.StoreInt32(&item.promotions, -2)
} else {
c.list.Remove(item.element)
}
@ -165,10 +165,10 @@ func (c *Cache) worker() {
func (c *Cache) doPromote(item *Item) bool {
//already deleted
if item.promotions == -2 {
if atomic.LoadInt32(&item.promotions) == -2 {
return false
}
item.promotions = 0
atomic.StoreInt32(&item.promotions, 0)
if item.element != nil { //not a new item
c.list.MoveToFront(item.element)
return false