Page

source: bluebase/rm/page.py

---

class RmPageHeader(page: PfPage, *, offset: int, limit: int)

Bases: PfPageView, LayoutMixin

file page header를 나타내는 view 클래스입니다.

Layout

Offset	Size	Name	Format
0	4	next_available_pid	'<i'

NO_NEXT_AVAILABLE_PAGE: ClassVar[RmPageId] = -1

다음 available page가 없을 경우 사용하는 상수.

size: ClassVar[int] = 4

The total size of the layout, automatically calculated from fields.

class RmPageBitmap(page: PfPage, *, offset: int, capacity: int)

Bases: PfPageView

Variables:

capacity (int)

static calc_size(*, capacity: int) → int

assignmentfind_first_zero() → int

assignmentset_bit(position: int) → None

assignmentclear_bit(position: int) → None

assignmentcheck_bit(position: int) → bool

assignmentreset() → None

assignmentis_empty() → bool

assignmentis_full() → bool

class RmPage(page_: PfPage, record_size: int, record_capacity: int)

Bases: object

Variables:

• pid (RmPageId)

• page (PfPage)

• record_size (int)

• record_capacity (int)

classmethod new(page_: PfPage, record_size: int, record_capacity: int) → Self

property header_offset: intread-only

property header_size: intread-only

property bitmap_offset: intread-only

property bitmap_size: intread-only

property payload_offset: intread-only

property last_sid: RmSlotIdread-only

property next_available_pid: RmPageId | Noneread-write

validate_sid(sid: RmSlotId) → None

validate_slot_occupied(sid: RmSlotId) → None

validate_slot_unoccupied(sid: RmSlotId) → None

get_header() → RmPageHeader

get_bitmap() → RmPageBitmap

get_record_offset(sid: RmSlotId) → int

assignmentis_empty() → bool

assignmentis_full() → bool

assignmentfind_first_free_slot() → RmSlotId

assignmentunpin() → None

assignmentget_record(sid: RmSlotId) → RmRecord

Raises:

• RmInvalidSlotIdError –

• RmSlotUnoccupiedError –

assignmentset_record(sid: RmSlotId, data: RmRecordData, *, new: bool = False) → None

Raises:

• RmInvalidSlotIdError –

• RmSlotUnoccupiedError –

• RmInvalidRecordDataSizeError –

assignmentclear_slot(sid: RmSlotId) → None

Raises:

• RmInvalidSlotIdError –

• RmSlotUnoccupiedError –

assignmentcheck_slot(sid: RmSlotId) → bool

Raises:

RmInvalidSlotIdError –