47 lines
684 B
Go
47 lines
684 B
Go
package session
|
|
|
|
import cid "github.com/ipfs/go-cid"
|
|
|
|
type cidQueue struct {
|
|
elems []cid.Cid
|
|
eset *cid.Set
|
|
}
|
|
|
|
func newCidQueue() *cidQueue {
|
|
return &cidQueue{eset: cid.NewSet()}
|
|
}
|
|
|
|
func (cq *cidQueue) Pop() cid.Cid {
|
|
for {
|
|
if len(cq.elems) == 0 {
|
|
return cid.Cid{}
|
|
}
|
|
|
|
out := cq.elems[0]
|
|
cq.elems = cq.elems[1:]
|
|
|
|
if cq.eset.Has(out) {
|
|
cq.eset.Remove(out)
|
|
return out
|
|
}
|
|
}
|
|
}
|
|
|
|
func (cq *cidQueue) Push(c cid.Cid) {
|
|
if cq.eset.Visit(c) {
|
|
cq.elems = append(cq.elems, c)
|
|
}
|
|
}
|
|
|
|
func (cq *cidQueue) Remove(c cid.Cid) {
|
|
cq.eset.Remove(c)
|
|
}
|
|
|
|
func (cq *cidQueue) Has(c cid.Cid) bool {
|
|
return cq.eset.Has(c)
|
|
}
|
|
|
|
func (cq *cidQueue) Len() int {
|
|
return cq.eset.Len()
|
|
}
|