func (p *Pool) wrapOpen(imageName string, action func(*C.rbd_image_t) error) error {
image := C.make_image()
imageStr := C.CString(imageName)
defer func() {
C.free(unsafe.Pointer(image))
C.free(unsafe.Pointer(imageStr))
}()
if i, err := C.rbd_open(p.ioctx, imageStr, image, nil); err != nil || i < 0 {
if i < 0 {
err = strerror(i)
}
return fmt.Errorf("Error creating snapshot: %v", err)
}
defer func() error {
if i, err := C.rbd_close(*image); err != nil || i < 0 {
if i < 0 {
err = strerror(i)
}
return fmt.Errorf("Error creating snapshot: %v", err)
}
return nil
}()
if err := action(image); err != nil {
return err
}
return nil
}
// int rbd_close(rbd_image_t image);
func (image *Image) Close() error {
if image.image == nil {
return RbdErrorImageNotOpen
}
ret := C.rbd_close(image.image)
if ret != 0 {
return RBDError(ret)
}
image.image = nil
return nil
}