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30 lines
452 B
30 lines
452 B
package internal
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import (
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"time"
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"github.com/go-redis/redis/v8/internal/rand"
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)
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func RetryBackoff(retry int, minBackoff, maxBackoff time.Duration) time.Duration {
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if retry < 0 {
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panic("not reached")
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}
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if minBackoff == 0 {
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return 0
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}
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d := minBackoff << uint(retry)
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if d < minBackoff {
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return maxBackoff
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}
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d = minBackoff + time.Duration(rand.Int63n(int64(d)))
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if d > maxBackoff || d < minBackoff {
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d = maxBackoff
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}
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return d
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}
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