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reset lastContainer cache on Put to a mapped container. check lastContainer cache on Get

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Travis Turner 2018-01-15 19:59:14 -06:00
parent ce052c133c
commit e0fc49b512
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1 changed files with 13 additions and 1 deletions
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14
roaring/containers_btree.go
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@ -24,15 +24,28 @@ type BTreeContainers struct {
}
func (btc *BTreeContainers) Get(key uint64) *container {
// Check the last* cache for same container.
if key == btc.lastKey && btc.lastContainer != nil {
return btc.lastContainer
}
var c *container
el, ok := btc.tree.Get(key)
if ok {
c = el.(*container)
btc.lastKey = key
btc.lastContainer = c
}
return c
}
func (btc *BTreeContainers) Put(key uint64, c *container) {
// If a mapped container is added to the tree, reset the
// lastContainer cache so that the cache is not pointing
// at a read-only mmap.
if c.mapped {
btc.lastContainer = nil
}
btc.tree.Set(key, c)
}
@ -73,7 +86,6 @@ func (btc *BTreeContainers) Clone() Containers {
}
nbtc.tree.Set(k, v.(*container).clone())
}
return nbtc
}