mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
109 lines
2.6 KiB
Go
109 lines
2.6 KiB
Go
// Copyright 2017 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package leasing
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import (
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"bytes"
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v3 "go.etcd.io/etcd/clientv3"
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v3pb "go.etcd.io/etcd/etcdserver/etcdserverpb"
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)
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func compareInt64(a, b int64) int {
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switch {
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case a < b:
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return -1
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case a > b:
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return 1
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default:
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return 0
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}
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}
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func evalCmp(resp *v3.GetResponse, tcmp v3.Cmp) bool {
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var result int
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if len(resp.Kvs) != 0 {
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kv := resp.Kvs[0]
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switch tcmp.Target {
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case v3pb.Compare_VALUE:
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if tv, _ := tcmp.TargetUnion.(*v3pb.Compare_Value); tv != nil {
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result = bytes.Compare(kv.Value, tv.Value)
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}
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case v3pb.Compare_CREATE:
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if tv, _ := tcmp.TargetUnion.(*v3pb.Compare_CreateRevision); tv != nil {
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result = compareInt64(kv.CreateRevision, tv.CreateRevision)
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}
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case v3pb.Compare_MOD:
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if tv, _ := tcmp.TargetUnion.(*v3pb.Compare_ModRevision); tv != nil {
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result = compareInt64(kv.ModRevision, tv.ModRevision)
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}
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case v3pb.Compare_VERSION:
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if tv, _ := tcmp.TargetUnion.(*v3pb.Compare_Version); tv != nil {
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result = compareInt64(kv.Version, tv.Version)
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}
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}
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}
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switch tcmp.Result {
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case v3pb.Compare_EQUAL:
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return result == 0
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case v3pb.Compare_NOT_EQUAL:
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return result != 0
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case v3pb.Compare_GREATER:
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return result > 0
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case v3pb.Compare_LESS:
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return result < 0
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}
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return true
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}
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func gatherOps(ops []v3.Op) (ret []v3.Op) {
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for _, op := range ops {
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if !op.IsTxn() {
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ret = append(ret, op)
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continue
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}
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_, thenOps, elseOps := op.Txn()
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ret = append(ret, gatherOps(append(thenOps, elseOps...))...)
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}
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return ret
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}
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func gatherResponseOps(resp []*v3pb.ResponseOp, ops []v3.Op) (ret []v3.Op) {
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for i, op := range ops {
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if !op.IsTxn() {
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ret = append(ret, op)
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continue
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}
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_, thenOps, elseOps := op.Txn()
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if txnResp := resp[i].GetResponseTxn(); txnResp.Succeeded {
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ret = append(ret, gatherResponseOps(txnResp.Responses, thenOps)...)
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} else {
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ret = append(ret, gatherResponseOps(txnResp.Responses, elseOps)...)
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}
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}
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return ret
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}
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func copyHeader(hdr *v3pb.ResponseHeader) *v3pb.ResponseHeader {
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h := *hdr
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return &h
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}
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func closeAll(chs []chan<- struct{}) {
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for _, ch := range chs {
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close(ch)
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}
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}
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