1package metrics
2
3import "sync"
4
5type Metric1[T comparable] struct {
6 mu sync.Mutex
7 m map[T]int
8}
9
10func (m *Metric1[T]) Add(v T) {
11 m.mu.Lock()
12 defer m.mu.Unlock()
13 if m.m == nil {
14 m.m = make(map[T]int)
15 }
16 m[v]++
17}
18
19type key2[T1, T2 comparable] struct {
20 f1 T1
21 f2 T2
22}
23
24type Metric2[T1, T2 cmp2] struct {
25 mu sync.Mutex
26 m map[key2[T1, T2]]int
27}
28
29func (m *Metric2[T1, T2]) Add(v1 T1, v2 T2) {
30 m.mu.Lock()
31 defer m.mu.Unlock()
32 if m.m == nil {
33 m.m = make(map[key2[T1, T2]]int)
34 }
35 m[key[T1, T2]{v1, v2}]++
36}
37
38type key3[T1, T2, T3 comparable] struct {
39 f1 T1
40 f2 T2
41 f3 T3
42}
43
44type Metric3[T1, T2, T3 comparable] struct {
45 mu sync.Mutex
46 m map[key3[T1, T2, T3]]int
47}
48
49func (m *Metric3[T1, T2, T3]) Add(v1 T1, v2 T2, v3 T3) {
50 m.mu.Lock()
51 defer m.mu.Unlock()
52 if m.m == nil {
53 m.m = make(map[key3]int)
54 }
55 m[key[T1, T2, T3]{v1, v2, v3}]++
56}
57
58// Repeat for the maximum number of permitted arguments.
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