Struct BaoPoll 

pub struct BaoPoll { /* private fields */ }

Rust mirror of the C us_poll_t. Layout:

struct us_poll_t {
    alignas(LIBUS_EXT_ALIGNMENT) struct {
        signed int fd : 27;
        unsigned int poll_type : 5;
    } state;
};

The C struct is 4 bytes of bitfields + 12 bytes alignment padding = 16 bytes total (with alignas(16)). We represent the bitfield as a single u32 and provide accessors.

Invariant: fd fits in i27 (−2²⁶..2²⁶−1), poll_type fits in u5 (0..31).

Implementations

impl BaoPoll

pub fn fd(&self) -> i32

Read the fd field (signed 27-bit).

pub fn set_fd(&mut self, fd: i32)

Write the fd field.

pub fn poll_type(&self) -> i32

Read the poll_type field (unsigned 5-bit).

pub fn set_poll_type(&mut self, pt: i32)

Write the poll_type field.

pub fn kind(&self) -> i32

Returns the kind: poll_type & POLL_TYPE_KIND_MASK.

pub fn events(&self) -> i32

Decode the polling events to epoll flags. (POLLING_IN ? EPOLLIN : 0) | (POLLING_OUT ? EPOLLOUT : 0)

pub fn ext(&self) -> *mut c_void

Return a pointer to the trailing extension bytes.