Struct SendZc

pub struct SendZc { /* private fields */ }

Send a zerocopy message on a socket, equivalent to send(2).

When dest_addr is non-zero it points to the address of the target with dest_addr_len specifying its size, turning the request into a sendto(2)

A fixed (pre-mapped) buffer can optionally be used from pre-mapped buffers that have been previously registered with Submitter::register_buffers.

This operation might result in two completion queue entries. See the IORING_OP_SEND_ZC section at io_uring_enter for the exact semantics. Notifications posted by this operation can be checked with notif.

Implementations

impl SendZc

pub const CODE: u8 = 47u8

The opcode of the operation. This can be passed to Probe::is_supported to check if this operation is supported with the current kernel.

pub fn new(fd: impl UseFixed, buf: *const u8, len: u32) -> Self

pub const fn buf_index(self, buf_index: Option<u16>) -> Self

The buf_index is an index into an array of fixed buffers, and is only valid if fixed buffers were registered.

The buf and len arguments must fall within a region specified by buf_index in the previously registered buffer. The buffer need not be aligned with the start of the registered buffer.

pub const fn dest_addr(self, dest_addr: *const sockaddr) -> Self

pub const fn dest_addr_len(self, dest_addr_len: socklen_t) -> Self

pub const fn flags(self, flags: i32) -> Self

pub const fn zc_flags(self, zc_flags: u16) -> Self

pub fn build(self) -> Entry