32 lines
605 B
Go
32 lines
605 B
Go
// Copyright (C) 2014 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at http://mozilla.org/MPL/2.0/.
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// Package lamport implements a simple Lamport Clock for versioning
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package lamport
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import "sync"
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var Default = Clock{}
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type Clock struct {
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val int64
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mut sync.Mutex
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}
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func (c *Clock) Tick(v int64) int64 {
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c.mut.Lock()
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if v > c.val {
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c.val = v + 1
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c.mut.Unlock()
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return v + 1
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} else {
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c.val++
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v = c.val
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c.mut.Unlock()
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return v
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}
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}
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