mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-09-21 07:59:51 +00:00
39 lines
833 B
Go
39 lines
833 B
Go
|
package syncs
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"reflect"
|
||
|
|
"sync"
|
||
|
|
)
|
||
|
|
|
||
|
|
// MergeChans returns a channel that is closed when any of the input channels are signaled.
|
||
|
|
// The caller must call the returned CancelFunc to ensure no resources are leaked.
|
||
|
|
func MergeChans[T any](chans ...<-chan T) (<-chan T, context.CancelFunc) {
|
||
|
|
var once sync.Once
|
||
|
|
out := make(chan T)
|
||
|
|
cancel := make(chan T)
|
||
|
|
cancelFunc := func() {
|
||
|
|
once.Do(func() {
|
||
|
|
close(cancel)
|
||
|
|
})
|
||
|
|
<-out
|
||
|
|
}
|
||
|
|
cases := make([]reflect.SelectCase, len(chans)+1)
|
||
|
|
for i := range chans {
|
||
|
|
cases[i] = reflect.SelectCase{
|
||
|
|
Dir: reflect.SelectRecv,
|
||
|
|
Chan: reflect.ValueOf(chans[i]),
|
||
|
|
}
|
||
|
|
}
|
||
|
|
cases[len(cases)-1] = reflect.SelectCase{
|
||
|
|
Dir: reflect.SelectRecv,
|
||
|
|
Chan: reflect.ValueOf(cancel),
|
||
|
|
}
|
||
|
|
go func() {
|
||
|
|
defer close(out)
|
||
|
|
_, _, _ = reflect.Select(cases)
|
||
|
|
}()
|
||
|
|
|
||
|
|
return out, cancelFunc
|
||
|
|
}
|