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20 lines
378 B
Go
20 lines
378 B
Go
package dnsfilter
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import (
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"sync/atomic"
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)
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func updateMax(valuePtr *int64, maxPtr *int64) {
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for {
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current := atomic.LoadInt64(valuePtr)
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max := atomic.LoadInt64(maxPtr)
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if current <= max {
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break
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}
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swapped := atomic.CompareAndSwapInt64(maxPtr, max, current)
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if swapped {
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break
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}
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// swapping failed because value has changed after reading, try again
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}
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}
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