Mirroristas/etcd
2
0
Fork 0
mirror of https://github.com/etcd-io/etcd.git synced 2024-09-27 06:25:44 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #8666 from lorneli/ordering

Browse Source 
clientv3/ordering: compare and update prevRev atomically
This commit is contained in:
Xiang Li 2017-10-09 11:14:40 -07:00 committed by GitHub
commit ed92420950
1 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
clientv3/ordering/kv.go
View File

@ -42,11 +42,10 @@ func (kv *kvOrdering) getPrevRev() int64 {
}
func (kv *kvOrdering) setPrevRev(currRev int64) {
prevRev := kv.getPrevRev()
if currRev > prevRev {
kv.revMu.Lock()
kv.revMu.Lock()
defer kv.revMu.Unlock()
if currRev > kv.prevRev {
kv.prevRev = currRev
kv.revMu.Unlock()
}
}
@ -63,7 +62,9 @@ func (kv *kvOrdering) Get(ctx context.Context, key string, opts ...clientv3.OpOp
return nil, err
}
resp := r.Get()
if resp.Header.Revision >= prevRev {
if resp.Header.Revision == prevRev {
return resp, nil
} else if resp.Header.Revision > prevRev {
kv.setPrevRev(resp.Header.Revision)
return resp, nil
}