Struct EventsChainLayout4 

#[repr(C, align(64))]
pub struct EventsChainLayout4 {
    pub header: LayoutHeader,
    pub initialized: IndexbusAtomicU32,
    pub _pad0: u32,
    pub _pad_to_64: [u8; 40],
    pub slot_pool: SlotPoolLayout,
    pub queues: [IndexQueue; 4],
    pub mpsc_queues: [MpscQueue; 4],
}

Concrete v1 events chain layout for Q=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 64-byte-aligned section starts at offset 64.

slot_pool: SlotPoolLayout

Shared slot pool for payload bytes.

queues: [IndexQueue; 4]

Per-edge SPSC queues of slot indices.

mpsc_queues: [MpscQueue; 4]

Per-edge MPSC queues of slot indices.

Implementations

impl EventsChainLayout4

pub const REQUIRED_CAPS: u32 = EventsChainLayout<4>::REQUIRED_CAPS

Capabilities required for this region to be considered compatible.

pub const REGION_KIND: u16 = EventsChainLayout<4>::REGION_KIND

Region kind discriminator stored in LayoutHeader.flags.

pub const REGION_KIND_MASK: u16 = EventsChainLayout<4>::REGION_KIND_MASK

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