| 1 | package as400 |
| 2 | |
| 3 | import ( |
| 4 | "maps" |
| 5 | "sync" |
| 6 | "time" |
| 7 | ) |
| 8 | |
| 9 | type latencyCache struct { |
| 10 | mu sync.RWMutex |
| 11 | values map[string]int64 |
| 12 | last time.Time |
| 13 | } |
| 14 | |
| 15 | func (l *latencyCache) beginCycle(ts time.Time) { |
| 16 | l.mu.Lock() |
| 17 | if l.values == nil { |
| 18 | l.values = make(map[string]int64) |
| 19 | } |
| 20 | l.last = ts |
| 21 | l.mu.Unlock() |
| 22 | } |
| 23 | |
| 24 | func (l *latencyCache) add(name string, value int64) { |
| 25 | if value == 0 { |
| 26 | return |
| 27 | } |
| 28 | l.mu.Lock() |
| 29 | if l.values == nil { |
| 30 | l.values = make(map[string]int64) |
| 31 | } |
| 32 | l.values[name] += value |
| 33 | l.mu.Unlock() |
| 34 | } |
| 35 | |
| 36 | func (l *latencyCache) snapshot() (map[string]int64, time.Time) { |
| 37 | l.mu.RLock() |
| 38 | defer l.mu.RUnlock() |
| 39 | if len(l.values) == 0 { |
| 40 | return nil, l.last |
| 41 | } |
| 42 | out := make(map[string]int64, len(l.values)) |
| 43 | maps.Copy(out, l.values) |
| 44 | return out, l.last |
| 45 | } |