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40 lines
684 B
Go
40 lines
684 B
Go
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package twap
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import "sync"
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type DoneSignal struct {
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doneC chan struct{}
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mu sync.Mutex
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}
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func NewDoneSignal() *DoneSignal {
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return &DoneSignal{
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doneC: make(chan struct{}),
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}
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}
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func (e *DoneSignal) Emit() {
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e.mu.Lock()
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if e.doneC == nil {
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e.doneC = make(chan struct{})
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}
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close(e.doneC)
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e.mu.Unlock()
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}
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// Chan returns a channel that emits a signal when the execution is done.
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func (e *DoneSignal) Chan() (c <-chan struct{}) {
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// if the channel is not allocated, it means it's not started yet, we need to return a closed channel
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e.mu.Lock()
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if e.doneC == nil {
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e.doneC = make(chan struct{})
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c = e.doneC
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} else {
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c = e.doneC
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}
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e.mu.Unlock()
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return c
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}
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