Struct SequencedSlotsLayout4 

#[repr(C, align(64))]
pub struct SequencedSlotsLayout4 {
    pub header: LayoutHeader,
    pub initialized: IndexbusAtomicU32,
    pub _pad0: u32,
    pub _pad_to_64: [u8; 40],
    pub cursor: IndexbusAtomicU64,
    pub _pad_cursor: [u8; 56],
    pub gating: [SequencerGatingCell; 4],
    pub slot_pool: SlotPoolLayout,
    pub ring: [IndexbusAtomicU32; 1024],
}

Concrete v1 sequenced-slots layout for N=4.

This is a convenient “known size” layout for tools and smoke tests.

Fields

header: LayoutHeader

Common region header (magic/version/capabilities/layout size).

initialized: IndexbusAtomicU32

0 = uninitialized, 1 = initializing, 2 = initialized

_pad0: u32

Padding (reserved).

_pad_to_64: [u8; 40]

Pad to 64 so the first counter starts at offset 64.

cursor: IndexbusAtomicU64

Producer cursor (monotonic sequence).

_pad_cursor: [u8; 56]

Padding to keep the cursor in its own cache line.

gating: [SequencerGatingCell; 4]

Per-consumer gating sequences.

slot_pool: SlotPoolLayout

Slot pool storing payload bytes.

ring: [IndexbusAtomicU32; 1024]

Ring mapping seq -> slot index.

Implementations

impl SequencedSlotsLayout4

pub const REQUIRED_CAPS: u32 = SequencedSlotsLayout<BYTEOR_SEQUENCED_SLOTS_CONSUMERS_DEFAULT>::REQUIRED_CAPS

Capabilities required for this region to be considered compatible.

pub const REGION_KIND: u16 = SequencedSlotsLayout<BYTEOR_SEQUENCED_SLOTS_CONSUMERS_DEFAULT>::REGION_KIND

Region kind discriminator stored in LayoutHeader.flags.

pub const REGION_KIND_MASK: u16 = SequencedSlotsLayout<BYTEOR_SEQUENCED_SLOTS_CONSUMERS_DEFAULT>::REGION_KIND_MASK

Mask for the low 8 bits containing the region kind discriminator.

pub const EMPTY_RING: u32 = SequencedSlotsLayout<BYTEOR_SEQUENCED_SLOTS_CONSUMERS_DEFAULT>::EMPTY_RING

Sentinel stored in ring entries before a slot is published.