Golang rados_ioctx_snap_get_name示例

示例#1

文件： rados_snap.go 项目： vuleetu/gorados

func (r *RadosIoCtx) SnapGetName(snapid RadosSnapId) (string, error) {
	var snapname [MAX_NAME_LEN]C.char
	cerr := C.rados_ioctx_snap_get_name(*r.ctx, C.rados_snap_t(snapid), &snapname[0], MAX_NAME_LEN)
	if cerr < 0 {
		return "", errors.New("get snap name failed")
	}

	return C.GoString(&snapname[0]), nil
}

示例#2

文件： snapshots.go 项目： objStorage/grados

// ReverseLookupSnapshot returns the name of the given pool snapshot id.
func (pool *Pool) ReverseLookupSnapshot(snapId SnapshotId) (string, error) {
	id := C.rados_snap_t(snapId)
	bufLen := 8
	for {
		bufAddr := bufferAddress(bufLen)
		ret := C.rados_ioctx_snap_get_name(pool.context, id, bufAddr, C.int(bufLen))
		if int(ret) == -int(syscall.ERANGE) {
			bufLen *= 2
			continue
		}
		if ret < 0 {
			err := toRadosError(ret)
			err.Message = fmt.Sprintf("Unable to reverse lookup pool snapshot id %d.", snapId)
			return "", err
		}
		name := C.GoString(bufAddr)
		return name, nil
	}
}