30 lines
563 B
Go
30 lines
563 B
Go
// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
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// All rights reserved. Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file.
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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 uint64
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mut sync.Mutex
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}
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func (c *Clock) Tick(v uint64) uint64 {
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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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