Golang go_lxc_snapshot_listの例

コード例 #1

ファイル: container.go プロジェクト: rsampaio/go-lxc

// Snapshots returns the list of container snapshots.
func (c *Container) Snapshots() ([]Snapshot, error) {
	if err := c.makeSure(isDefined); err != nil {
		return nil, err
	}

	c.mu.Lock()
	defer c.mu.Unlock()

	var csnapshots *C.struct_lxc_snapshot
	var snapshots []Snapshot

	size := int(C.go_lxc_snapshot_list(c.container, &csnapshots))
	defer freeSnapshots(csnapshots, size)

	if size < 1 {
		return nil, ErrNoSnapshot
	}

	p := uintptr(unsafe.Pointer(csnapshots))
	for i := 0; i < size; i++ {
		z := (*C.struct_lxc_snapshot)(unsafe.Pointer(p))
		s := &Snapshot{Name: C.GoString(z.name), Timestamp: C.GoString(z.timestamp),
			CommentPath: C.GoString(z.comment_pathname), Path: C.GoString(z.lxcpath)}
		snapshots = append(snapshots, *s)
		p += unsafe.Sizeof(*csnapshots)
	}
	return snapshots, nil
}

コード例 #2

ファイル: container.go プロジェクト: zanella/nomad

// Snapshots returns the list of container snapshots.
func (c *Container) Snapshots() ([]Snapshot, error) {
	if err := c.makeSure(isDefined); err != nil {
		return nil, err
	}

	c.mu.Lock()
	defer c.mu.Unlock()

	var csnapshots *C.struct_lxc_snapshot

	size := int(C.go_lxc_snapshot_list(c.container, &csnapshots))
	defer freeSnapshots(csnapshots, size)

	if size < 1 {
		return nil, ErrNoSnapshot
	}

	hdr := reflect.SliceHeader{
		Data: uintptr(unsafe.Pointer(csnapshots)),
		Len:  size,
		Cap:  size,
	}
	gosnapshots := *(*[]C.struct_lxc_snapshot)(unsafe.Pointer(&hdr))

	snapshots := make([]Snapshot, size, size)
	for i := 0; i < size; i++ {
		snapshots[i] = Snapshot{
			Name:        C.GoString(gosnapshots[i].name),
			Timestamp:   C.GoString(gosnapshots[i].timestamp),
			CommentPath: C.GoString(gosnapshots[i].comment_pathname),
			Path:        C.GoString(gosnapshots[i].lxcpath),
		}
	}

	return snapshots, nil
}