-
Notifications
You must be signed in to change notification settings - Fork 1
/
runner.go
54 lines (45 loc) · 1.06 KB
/
runner.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
52
53
54
/*
© 2022–present Harald Rudell <harald.rudell@gmail.com> (https://haraldrudell.github.io/haraldrudell/)
ISC License
*/
package counter
import (
"sync"
"time"
)
// runner is a container executing rate-counters for a particular interval
type runner struct {
lock sync.RWMutex
tasks []RateRunnerTask // behind lock
}
// runner returns a container for rate-counters of a particular interval
func NewRunner() (run *runner) {
return &runner{}
}
// Add adds an additional rate-counter to this container
func (r *runner) Add(task RateRunnerTask) {
r.lock.Lock()
defer r.lock.Unlock()
r.tasks = append(r.tasks, task)
}
// Do is invoked by a timer with an intended at time
func (r *runner) Do(at time.Time) {
at = time.Now() // obtain accurate time-stamp
for i := 0; ; i++ {
task := r.task(i)
if task == nil {
return
}
task.Do(at)
}
}
// task returns task n 0…, nil if no such task exists
func (r *runner) task(i int) (task RateRunnerTask) {
r.lock.RLock()
defer r.lock.RUnlock()
if i < 0 || i >= len(r.tasks) {
return
}
task = r.tasks[i]
return
}