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50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. 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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package proxy
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import "sync"
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type (
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uniqueIntGenerator interface {
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get() int
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}
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naiveUniqueIntGenerator struct {
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now int
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mtx sync.Mutex
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}
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)
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func (generator *naiveUniqueIntGenerator) get() int {
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generator.mtx.Lock()
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defer func() {
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generator.now++
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generator.mtx.Unlock()
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}()
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return generator.now
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}
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func newNaiveUniqueIntGenerator() *naiveUniqueIntGenerator {
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return &naiveUniqueIntGenerator{
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now: 0,
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}
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}
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var uniqueIntGeneratorIns uniqueIntGenerator
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var getUniqueIntGeneratorInsOnce sync.Once
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func getUniqueIntGeneratorIns() uniqueIntGenerator {
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getUniqueIntGeneratorInsOnce.Do(func() {
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uniqueIntGeneratorIns = newNaiveUniqueIntGenerator()
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})
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return uniqueIntGeneratorIns
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}
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