| khenaidoo | 59ce9dd | 2019-11-11 13:05:32 -0500 | [diff] [blame] | 1 | // Copyright 2015 The etcd Authors |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package etcdserver |
| 16 | |
| 17 | import ( |
| 18 | "sync/atomic" |
| 19 | ) |
| 20 | |
| 21 | // consistentIndex represents the offset of an entry in a consistent replica log. |
| 22 | // It implements the mvcc.ConsistentIndexGetter interface. |
| 23 | // It is always set to the offset of current entry before executing the entry, |
| 24 | // so ConsistentWatchableKV could get the consistent index from it. |
| 25 | type consistentIndex uint64 |
| 26 | |
| 27 | func (i *consistentIndex) setConsistentIndex(v uint64) { |
| 28 | atomic.StoreUint64((*uint64)(i), v) |
| 29 | } |
| 30 | |
| 31 | func (i *consistentIndex) ConsistentIndex() uint64 { |
| 32 | return atomic.LoadUint64((*uint64)(i)) |
| 33 | } |