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33 lines
522 B
Go
33 lines
522 B
Go
// Copyright 2022, Chef. All rights reserved.
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// https://github.com/q191201771/naza
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//
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// Use of this source code is governed by a MIT-style license
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// that can be found in the License file.
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//
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// Author: Chef (191201771@qq.com)
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package nazasync
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import (
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"sync"
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"sync/atomic"
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)
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type StdOnce struct {
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core sync.Once
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}
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func (o *StdOnce) Do(f func()) {
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o.core.Do(f)
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}
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type NonblockingOnce struct {
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done uint32
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}
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func (o *NonblockingOnce) Do(f func()) {
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if atomic.CompareAndSwapUint32(&o.done, 0, 1) {
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f()
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}
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}
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