mirror of
https://github.com/c9s/bbgo.git
synced 2024-11-15 19:43:53 +00:00
40 lines
684 B
Go
40 lines
684 B
Go
|
package twap
|
||
|
|
|
||
|
|
import "sync"
|
||
|
|
|
||
|
|
type DoneSignal struct {
|
||
|
|
doneC chan struct{}
|
||
|
|
mu sync.Mutex
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewDoneSignal() *DoneSignal {
|
||
|
|
return &DoneSignal{
|
||
|
|
doneC: make(chan struct{}),
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (e *DoneSignal) Emit() {
|
||
|
|
e.mu.Lock()
|
||
|
|
if e.doneC == nil {
|
||
|
|
e.doneC = make(chan struct{})
|
||
|
|
}
|
||
|
|
|
||
|
|
close(e.doneC)
|
||
|
|
e.mu.Unlock()
|
||
|
|
}
|
||
|
|
|
||
|
|
// Chan returns a channel that emits a signal when the execution is done.
|
||
|
|
func (e *DoneSignal) Chan() (c <-chan struct{}) {
|
||
|
|
// if the channel is not allocated, it means it's not started yet, we need to return a closed channel
|
||
|
|
e.mu.Lock()
|
||
|
|
if e.doneC == nil {
|
||
|
|
e.doneC = make(chan struct{})
|
||
|
|
c = e.doneC
|
||
|
|
} else {
|
||
|
|
c = e.doneC
|
||
|
|
}
|
||
|
|
e.mu.Unlock()
|
||
|
|
|
||
|
|
return c
|
||
|
|
}
|