/
track.go
140 lines (127 loc) · 2.28 KB
/
track.go
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package tuning
import (
"container/list"
"sync"
)
type trackSign int
const (
_ trackSign = iota
play
stop
finish
)
// Track - the task
type Track struct {
melody *Melody
next *list.List
in chan interface{}
sign chan trackSign
runIsCalled bool
}
// NewTrack - new task
func NewTrack(m *Melody, bufLen int) *Track {
return &Track{
melody: m,
next: list.New(),
in: make(chan interface{}, bufLen),
sign: make(chan trackSign),
runIsCalled: false,
}
}
// Run - init
func (t *Track) run() {
if t.runIsCalled {
return
}
t.runIsCalled = true
running := true
unlock := true
var wg = &sync.WaitGroup{}
DONE:
for {
select {
case sign := <-t.sign:
switch sign {
case play:
running = true
case stop:
running = false
case finish:
close(t.in)
close(t.sign)
break DONE
default:
break DONE
}
default:
if running && unlock {
unlock = false
// fmt.Println("lock", *t.melody)
wg.Add(1)
go func() {
defer func() {
// fmt.Println("unlock", *t.melody)
unlock = true
wg.Done()
}()
data := <-t.in
if data == nil {
// fmt.Println("Warning: nil")
return
}
ans := (*t.melody).Play(t, data)
// fmt.Println("ans", ans)
for e := t.next.Front(); e != nil; e = e.Next() {
wg.Add(1)
go func(e *list.Element) {
defer func() {
err := recover()
if err != nil {
next := e.Next()
t.next.Remove(e)
e = next
}
wg.Done()
}()
RunTrack(e.Value.(*Track)).Immediately()
e.Value.(*Track).in <- ans
}(e)
}
}()
}
// TODO: time.Sleep ?
}
}
wg.Wait()
}
// Play - continue task
func (t *Track) Play() {
t.sign <- play
}
// Stop - stop task
func (t *Track) Stop() {
t.sign <- stop
}
// Finish - finish task
func (t *Track) Finish() {
t.sign <- finish
}
// Before - t before n
func (t *Track) Before(n *Track) *Track {
for e := t.next.Front(); e != nil; e = e.Next() {
if e.Value == n {
return t
}
}
t.next.PushBack(n)
return t
}
// After - t after n
func (t *Track) After(n *Track) *Track {
n.Before(t)
return t
}
// Inputer - input to track's in chan
func (t *Track) Inputer(in interface{}) {
t.in <- in
}