mirror of https://github.com/tikv/client-go.git
75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
// Copyright 2021 TiKV Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// NOTE: The code in this file is based on code from the
|
|
// TiDB project, licensed under the Apache License v 2.0
|
|
//
|
|
// https://github.com/pingcap/tidb/tree/cc5e161ac06827589c4966674597c137cc9e809c/store/tikv/util/ts_set.go
|
|
//
|
|
|
|
// Copyright 2021 PingCAP, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package util
|
|
|
|
import "sync"
|
|
|
|
// TSSet is a set of timestamps.
|
|
type TSSet struct {
|
|
sync.RWMutex
|
|
m map[uint64]struct{}
|
|
}
|
|
|
|
// Put puts timestamps into the map.
|
|
func (s *TSSet) Put(tss ...uint64) {
|
|
s.Lock()
|
|
defer s.Unlock()
|
|
|
|
// Lazy initialization..
|
|
// Most of the time, there is no transaction lock conflict.
|
|
// So allocate this in advance is unnecessary and bad for performance.
|
|
if s.m == nil {
|
|
s.m = make(map[uint64]struct{}, 5)
|
|
}
|
|
|
|
for _, ts := range tss {
|
|
s.m[ts] = struct{}{}
|
|
}
|
|
}
|
|
|
|
// GetAll returns all timestamps in the set.
|
|
func (s *TSSet) GetAll() []uint64 {
|
|
s.RLock()
|
|
defer s.RUnlock()
|
|
if len(s.m) == 0 {
|
|
return nil
|
|
}
|
|
ret := make([]uint64, 0, len(s.m))
|
|
for ts := range s.m {
|
|
ret = append(ret, ts)
|
|
}
|
|
return ret
|
|
}
|