6f0d72bd
 zhangqijia
定时器功能完善优化
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package timewheel
import (
"container/list"
"pro2d/src/common"
"pro2d/src/components/workpool"
"sync"
"sync/atomic"
"time"
)
//skynet的时间轮 + 协程池
const (
TimeNearShift = 8
TimeNear = 1 << TimeNearShift
TimeLevelShift = 6
TimeLevel = 1 << TimeLevelShift
TimeNearMask = TimeNear - 1
TimeLevelMask = TimeLevel - 1
)
type bucket struct {
expiration int32
timers *list.List
mu sync.Mutex
}
func newBucket() *bucket {
return &bucket{
expiration: -1,
timers: list.New(),
mu: sync.Mutex{},
}
}
func (b*bucket) Add(t *timer) {
b.mu.Lock()
defer b.mu.Unlock()
b.timers.PushBack(t)
//t.setBucket(b)
//t.element = e
}
func (b*bucket) Flush(reinsert func(t *timer)) {
b.mu.Lock()
defer b.mu.Unlock()
for e := b.timers.Front(); e != nil; {
next := e.Next()
reinsert(e.Value.(*timer))
b.timers.Remove(e)
e = next
}
}
type timer struct {
expiration uint32
f func()
}
var TimingWheel *TimeWheel
func init() {
TimingWheel = NewTimeWheel()
TimingWheel.Start()
}
type TimeWheel struct {
tick time.Duration
ticker *time.Ticker
near [TimeNear]*bucket
t [4][TimeLevel]*bucket
time uint32
WorkPool *workpool.WorkPool
exit chan struct{}
}
func NewTimeWheel() *TimeWheel {
tw := &TimeWheel{
tick: 10*time.Millisecond,
time: 0,
WorkPool: workpool.NewWorkPool(common.WorkerPoolSize, common.MaxTaskPerWorker),
exit: nil,
}
for i :=0; i < TimeNear; i++ {
tw.near[i] = newBucket()
}
for i :=0; i < 4; i++ {
for j :=0; j < TimeLevel; j++ {
tw.t[i][j] = newBucket()
}
}
return tw
}
func (tw *TimeWheel) add(t *timer) bool {
time := t.expiration
currentTime := tw.time
if time <= currentTime {
return false
}
if (time | TimeNearMask) == (currentTime | TimeNearMask) {
tw.near[time&TimeNearMask].Add(t)
}else {
i := 0
mask := TimeNear << TimeNearShift
for i=0; i < 3; i ++ {
if (time | uint32(mask - 1)) == (currentTime | uint32(mask - 1)) {
break
}
mask <<= TimeLevelShift
}
tw.t[i][((time>>(TimeNearShift + i*TimeLevelShift)) & TimeLevelMask)].Add(t)
}
return true
}
func (tw *TimeWheel) addOrRun(t *timer) {
if !tw.add(t) {
workerID := int64(t.expiration) % tw.WorkPool.WorkerPoolSize
//将请求消息发送给任务队列
tw.WorkPool.TaskQueue[workerID] <- t.f
}
}
func (tw *TimeWheel) moveList(level, idx int) {
current := tw.t[level][idx]
current.Flush(tw.addOrRun)
}
func (tw *TimeWheel) shift() {
mask := TimeNear
tw.time++
ct := tw.time
if ct == 0 {
tw.moveList(3, 0)
}else {
time := ct >> TimeNearShift
i := 0
for (ct & uint32(mask-1)) == 0{
idx := time & TimeLevelMask
if idx != 0 {
tw.moveList(i, int(idx))
break
}
mask <<= TimeLevelShift
time >>= TimeLevelShift
i++
}
}
}
func (tw *TimeWheel) execute() {
idx := tw.time & TimeNearMask
tw.near[idx].Flush(tw.addOrRun)
}
func (tw *TimeWheel) update() {
tw.execute()
tw.shift()
tw.execute()
}
func (tw *TimeWheel) Start() {
tw.ticker = time.NewTicker(tw.tick)
tw.WorkPool.StartWorkerPool()
go func() {
for {
select {
case <- tw.ticker.C:
tw.update()
case <- tw.exit:
return
}
}
}()
}
func (tw *TimeWheel) Stop() {
close(tw.exit)
}
func (tw *TimeWheel) afterFunc(expiration time.Duration, f func()) {
time := atomic.LoadUint32(&tw.time)
tw.addOrRun(&timer{
expiration: uint32(expiration / tw.tick) + time,
f: f,
})
}
func TimeOut(expire time.Duration, f func()) {
TimingWheel.afterFunc(expire, f)
}
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