-
Notifications
You must be signed in to change notification settings - Fork 10
/
sequence_buffer.go
51 lines (40 loc) · 1.17 KB
/
sequence_buffer.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
// Copyright 2017 Tim Oster. All rights reserved.
// Use of this source code is governed by the MIT license.
// More information can be found in the LICENSE file.
package rmnp
import "sync"
type sequenceBuffer struct {
size sequenceNumber
sequences []sequenceNumber
states []bool
mutex sync.Mutex
}
func newSequenceBuffer(size sequenceNumber) *sequenceBuffer {
buffer := new(sequenceBuffer)
buffer.size = size
buffer.sequences = make([]sequenceNumber, size)
buffer.states = make([]bool, size)
return buffer
}
func (buffer *sequenceBuffer) reset() {
buffer.mutex.Lock()
defer buffer.mutex.Unlock()
for i := sequenceNumber(0); i < buffer.size; i++ {
buffer.sequences[i] = 0
buffer.states[i] = false
}
}
func (buffer *sequenceBuffer) get(sequence sequenceNumber) bool {
buffer.mutex.Lock()
defer buffer.mutex.Unlock()
if buffer.sequences[sequence%buffer.size] != sequence {
return false
}
return buffer.states[sequence%buffer.size]
}
func (buffer *sequenceBuffer) set(sequence sequenceNumber, value bool) {
buffer.mutex.Lock()
defer buffer.mutex.Unlock()
buffer.sequences[sequence%buffer.size] = sequence
buffer.states[sequence%buffer.size] = value
}