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client_datawatcher.go
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/
client_datawatcher.go
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package cli
import (
"context"
"github.com/elliotchance/pie/v2"
)
func (c *Client) newDataWatcher(ctx context.Context, handler RecvDataHandler) *_DataWatcher {
if ctx == nil {
ctx = context.Background()
}
ctx, cancel := context.WithCancel(ctx)
watcher := &_DataWatcher{
Context: ctx,
terminate: cancel,
terminatedChan: make(chan struct{}),
client: c,
handler: handler,
}
c.dataWatchers.Append(watcher)
c.wg.Add(1)
go watcher.mainLoop()
return watcher
}
type _DataWatcher struct {
context.Context
terminate context.CancelFunc
terminatedChan chan struct{}
client *Client
handler RecvDataHandler
}
func (w *_DataWatcher) Terminate() <-chan struct{} {
w.terminate()
return w.terminatedChan
}
func (w *_DataWatcher) mainLoop() {
defer func() {
w.terminate()
w.client.wg.Done()
close(w.terminatedChan)
}()
select {
case <-w.Done():
case <-w.client.Done():
}
w.client.dataWatchers.AutoLock(func(watchers *[]*_DataWatcher) {
*watchers = pie.DropWhile(*watchers, func(other *_DataWatcher) bool {
return other == w
})
})
}