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838de23357
also simplify readerLocks to be just like writeLocks, DRWMutex() is never shared and there are order guarantees that need for such a thing to work for RLock's
46 lines
1.3 KiB
Go
46 lines
1.3 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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"sync"
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)
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// lockedRandSource provides protected rand source, implements rand.Source interface.
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type lockedRandSource struct {
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lk sync.Mutex
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src rand.Source
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}
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// Int63 returns a non-negative pseudo-random 63-bit integer as an int64.
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func (r *lockedRandSource) Int63() (n int64) {
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r.lk.Lock()
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n = r.src.Int63()
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r.lk.Unlock()
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return
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}
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// Seed uses the provided seed value to initialize the generator to a
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// deterministic state.
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func (r *lockedRandSource) Seed(seed int64) {
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r.lk.Lock()
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r.src.Seed(seed)
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r.lk.Unlock()
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}
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