// SwitchSnapshot switches to a specified snapshot,
// creates a new empty delta on top of it, and makes it a top one
// (i.e. the one new data will be written to).
// Old top delta (i.e. data modified since the last snapshot) is lost.
func (d Ploop) SwitchSnapshot(uuid string) error {
var p C.struct_ploop_snapshot_switch_param
p.guid = C.CString(uuid)
defer cfree(p.guid)
ret := C.ploop_switch_snapshot_ex(d.d, &p)
return mkerr(ret)
}
// SwitchSnapshotExtended is same as SwitchSnapshot but with additional
// flags modifying its behavior. Please see individual flags description.
// Returns uuid of what was the old top delta if SkipDestroy flag is set.
func (d Ploop) SwitchSnapshotExtended(uuid string, flags SwitchFlag) (string, error) {
var p C.struct_ploop_snapshot_switch_param
oldUUID := ""
p.guid = C.CString(uuid)
defer cfree(p.guid)
p.flags = C.int(flags)
if flags&SkipDestroy != 0 {
oldUUID, err := UUID()
if err != nil {
return "", err
}
p.guid_old = C.CString(oldUUID)
defer cfree(p.guid_old)
}
ret := C.ploop_switch_snapshot_ex(d.d, &p)
return oldUUID, mkerr(ret)
}