Struct VecHeader 

pub struct VecHeader {
    pub magic: u32,
    pub slot_payload_size: u32,
    pub capacity: u64,
    pub len: AtomicU64,
    pub reserved: AtomicU64,
    /* private fields */
}

Fields

magic: u32

slot_payload_size: u32

capacity: u64

len: AtomicU64

Slots a reader may read: every index below this holds a fully written payload. A pusher advances it only after its own slot is written and every earlier reservation has committed.

reserved: AtomicU64

Slots handed out to pushers, committed or still being written. Ahead of len exactly while a push is in flight.