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34 lines
477 B
Go
34 lines
477 B
Go
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package util
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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 Reonce struct {
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done uint32
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m sync.Mutex
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}
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func (o *Reonce) Reset() {
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o.m.Lock()
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atomic.StoreUint32(&o.done, 0)
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o.m.Unlock()
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}
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func (o *Reonce) Do(f func()) {
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if atomic.LoadUint32(&o.done) == 0 {
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// Outlined slow-path to allow inlining of the fast-path.
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o.doSlow(f)
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}
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}
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func (o *Reonce) doSlow(f func()) {
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o.m.Lock()
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defer o.m.Unlock()
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if o.done == 0 {
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defer atomic.StoreUint32(&o.done, 1)
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f()
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}
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}
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