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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
package commitquery
// Marks returns the mark bits of one internal node.
func (query *query) marks(idx nodeIndex) markBits {
return query.nodes[idx].marks
}
// HasAnyMarks reports whether one internal node has any requested bit.
func (query *query) hasAnyMarks(idx nodeIndex, bits markBits) bool {
return query.nodes[idx].marks&bits != 0
}
// HasAllMarks reports whether one internal node already has all requested bits.
func (query *query) hasAllMarks(idx nodeIndex, bits markBits) bool {
return query.nodes[idx].marks&bits == bits
}
// SetMarks ORs one set of mark bits into one internal node.
func (query *query) setMarks(idx nodeIndex, bits markBits) {
newBits := bits &^ query.nodes[idx].marks
if newBits == 0 {
return
}
query.trackTouched(idx)
query.nodes[idx].marks |= bits
}
// ClearMarks removes one set of mark bits from one internal node.
func (query *query) clearMarks(idx nodeIndex, bits markBits) {
if query.nodes[idx].marks&bits == 0 {
return
}
query.trackTouched(idx)
query.nodes[idx].marks &^= bits
}
// BeginMarkPhase starts one tracked mark-mutation phase.
func (query *query) beginMarkPhase() {
for _, idx := range query.touched {
query.nodes[idx].marks = 0
}
query.markPhase++
if query.markPhase == 0 {
query.markPhase++
for i := range query.nodes {
query.nodes[i].touchedPhase = 0
}
}
query.touched = query.touched[:0]
}
// ClearTouchedMarks clears the provided bits from all nodes touched in the
// current mark phase.
func (query *query) clearTouchedMarks(bits markBits) {
for _, idx := range query.touched {
query.nodes[idx].marks &^= bits
}
}
func (query *query) trackTouched(idx nodeIndex) {
if query.nodes[idx].touchedPhase == query.markPhase {
return
}
query.nodes[idx].touchedPhase = query.markPhase
query.touched = append(query.touched, idx)
}
func (query *query) collectMarkedResults() []nodeIndex {
out := make([]nodeIndex, 0, 4)
for _, idx := range query.touched {
if !query.hasAnyMarks(idx, markResult) {
continue
}
if query.hasAnyMarks(idx, markStale) {
continue
}
out = append(out, idx)
}
return out
}
|
