remove signal.Once

common/signal/once.go

@@ -1,29 +0,0 @@
-package signal
-
-import (
-	"sync"
-	"sync/atomic"
-)
-
-type Once struct {
-	m    sync.Mutex
-	done uint32
-}
-
-func (o *Once) Do(f func()) {
-	if atomic.LoadUint32(&o.done) == 1 {
-		return
-	}
-	o.m.Lock()
-	defer o.m.Unlock()
-	if o.done == 0 {
-		atomic.StoreUint32(&o.done, 1)
-		f()
-	}
-}
-
-func (o *Once) Reset() {
-	o.m.Lock()
-	defer o.m.Unlock()
-	atomic.StoreUint32(&o.done, 0)
-}