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levelwheel.go
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levelwheel.go
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package timer
import (
"container/list"
"time"
)
const (
SlotCnt = 256
)
type levelWheel struct {
curPos uint8
slots []*list.List
}
type Job struct {
levelSlotIdx []uint8 // level: slot
f func()
CreateTime time.Time
}
func newLevelWheel() *levelWheel {
lw := &levelWheel{
curPos: 0,
slots: make([]*list.List, SlotCnt),
}
for i := 0; i < SlotCnt; i++ {
lw.slots[i] = list.New()
}
return lw
}
func (lw *levelWheel) addJob(slotIdx int, job *Job) error {
if slotIdx < 0 || slotIdx >= SlotCnt {
return ErrSlotInvalid
}
lw.slots[slotIdx].PushBack(job)
return nil
}
func (lw *levelWheel) fireEvents() {
l := lw.slots[lw.curPos]
if l == nil {
return
}
for e := l.Front(); e != nil; e = e.Next() {
job := e.Value.(*Job)
go job.f()
}
lw.slots[lw.curPos].Init()
}