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22 lines
323 B
22 lines
323 B
3 years ago
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package transport
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import (
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"net"
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"sync"
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)
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// onceCloseListener wraps a net.Listener, protecting it from
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// multiple Close calls.
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type onceCloseListener struct {
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net.Listener
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once sync.Once
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err error
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}
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func (o *onceCloseListener) Close() error {
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o.once.Do(func() {
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o.err = o.Listener.Close()
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})
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return o.err
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}
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