fix(all): impl. new apis to make sure safety

status.go

@@ -5,7 +5,6 @@ import "sync/atomic"
 const (
 	statusisbuffered = 1 << iota
 	statusdestroyed
-	statusisintrans
 )
 
 type status uintptr
@@ -58,11 +57,3 @@ func (c *status) hasdestroyed() bool {
 func (c *status) setdestroyed(v bool) {
 	c.setbool(v, statusdestroyed)
 }
-
-func (c *status) isintrans() bool {
-	return c.loadbool(statusisintrans)
-}
-
-func (c *status) setintrans(v bool) {
-	c.setbool(v, statusisintrans)
-}