Struct SequencerLayout 

#[repr(C, align(64))]
pub struct SequencerLayout<const N: usize> {
    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; N],
}

Sequencer region: Disruptor-style sequencer + gating sequences (control + counters).

This is a new region layout (v1 append-only) and must not reinterpret any existing region.

Notes:

• The data/ring storage can be appended after the control block in future versions.
• LayoutHeader.layout_bytes bounds all optional appended sections.

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; N]

Per-consumer gating sequences.

Implementations

impl<const N: usize> SequencerLayout<N>

pub const REQUIRED_CAPS: u32 = caps::INDEXBUS_CAP_SUPPORTS_SEQUENCER

Capabilities required for this region to be considered compatible.