mirror of https://github.com/minio/minio.git
46 lines
1.3 KiB
Go
46 lines
1.3 KiB
Go
|
// Copyright (c) 2015-2021 MinIO, Inc.
|
||
|
|
//
|
||
|
|
// This file is part of MinIO Object Storage stack
|
||
|
|
//
|
||
|
|
// This program is free software: you can redistribute it and/or modify
|
||
|
|
// it under the terms of the GNU Affero General Public License as published by
|
||
|
|
// the Free Software Foundation, either version 3 of the License, or
|
||
|
|
// (at your option) any later version.
|
||
|
|
//
|
||
|
|
// This program is distributed in the hope that it will be useful
|
||
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
// GNU Affero General Public License for more details.
|
||
|
|
//
|
||
|
|
// You should have received a copy of the GNU Affero General Public License
|
||
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
|
||
|
|
package dsync
|
||
|
|
|
||
|
|
import (
|
||
|
|
"math/rand"
|
||
|
|
"sync"
|
||
|
|
)
|
||
|
|
|
||
|
|
// lockedRandSource provides protected rand source, implements rand.Source interface.
|
||
|
|
type lockedRandSource struct {
|
||
|
|
lk sync.Mutex
|
||
|
|
src rand.Source
|
||
|
|
}
|
||
|
|
|
||
|
|
// Int63 returns a non-negative pseudo-random 63-bit integer as an int64.
|
||
|
|
func (r *lockedRandSource) Int63() (n int64) {
|
||
|
|
r.lk.Lock()
|
||
|
|
n = r.src.Int63()
|
||
|
|
r.lk.Unlock()
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// Seed uses the provided seed value to initialize the generator to a
|
||
|
|
// deterministic state.
|
||
|
|
func (r *lockedRandSource) Seed(seed int64) {
|
||
|
|
r.lk.Lock()
|
||
|
|
r.src.Seed(seed)
|
||
|
|
r.lk.Unlock()
|
||
|
|
}
|