mirror of https://github.com/milvus-io/milvus.git
56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
|
|
//
|
|
// 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 uniquegenerator
|
|
|
|
import "sync"
|
|
|
|
type (
|
|
UniqueIntGenerator interface {
|
|
GetInt() int
|
|
GetInts(count int) (int, int)
|
|
}
|
|
NaiveUniqueIntGenerator struct {
|
|
now int
|
|
mtx sync.Mutex
|
|
}
|
|
)
|
|
|
|
func (generator *NaiveUniqueIntGenerator) GetInts(count int) (int, int) {
|
|
generator.mtx.Lock()
|
|
defer func() {
|
|
generator.now += count
|
|
generator.mtx.Unlock()
|
|
}()
|
|
return generator.now, generator.now + count
|
|
}
|
|
|
|
func (generator *NaiveUniqueIntGenerator) GetInt() int {
|
|
begin, _ := generator.GetInts(1)
|
|
return begin
|
|
}
|
|
|
|
func NewNaiveUniqueIntGenerator() *NaiveUniqueIntGenerator {
|
|
return &NaiveUniqueIntGenerator{
|
|
now: 0,
|
|
}
|
|
}
|
|
|
|
var uniqueIntGeneratorIns UniqueIntGenerator
|
|
var getUniqueIntGeneratorInsOnce sync.Once
|
|
|
|
func GetUniqueIntGeneratorIns() UniqueIntGenerator {
|
|
getUniqueIntGeneratorInsOnce.Do(func() {
|
|
uniqueIntGeneratorIns = NewNaiveUniqueIntGenerator()
|
|
})
|
|
return uniqueIntGeneratorIns
|
|
}
|