go-winio: Don't increment the wait count if the file is closing
@@ -139,10 +139,10 @@ func (f *win32File) Close() error {
// prepareIo prepares for a new IO operation.
// The caller must call f.wg.Done() when the IO is finished, prior to Close() returning.
func (f *win32File) prepareIo() (*ioOperation, error) {
- f.wg.Add(1)
if f.isClosing() {
return nil, ErrFileClosed
}
+ f.wg.Add(1)
c := &ioOperation{}
c.ch = make(chan ioResult)
return c, nil
