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40 lines
1.2 KiB
Go
40 lines
1.2 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package dsync
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import (
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"math/rand"
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"time"
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)
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func backoffWait(min, unit, cap time.Duration) func(*rand.Rand, uint) time.Duration {
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if unit > time.Hour {
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// Protect against integer overflow
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panic("unit cannot exceed one hour")
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}
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return func(r *rand.Rand, attempt uint) time.Duration {
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sleep := min
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sleep += unit * time.Duration(attempt)
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if sleep > cap {
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sleep = cap
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}
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sleep -= time.Duration(r.Float64() * float64(sleep))
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return sleep
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}
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}
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