Function buf_ring_add [src]

Assigns buffer with the br buffer ring. buffer_id is identifier which will be returned in the CQE. buffer_offset is the offset to insert at from the current tail. If just one buffer is provided before the ring tail is committed with advance then offset should be 0. If buffers are provided in a loop before being committed, the offset must be incremented by one for each buffer added.

Prototype

pub fn buf_ring_add( br: *linux.io_uring_buf_ring, buffer: []u8, buffer_id: u16, mask: u16, buffer_offset: u16, ) void

Parameters

br: *linux.io_uring_buf_ringbuffer: []u8buffer_id: u16mask: u16buffer_offset: u16

Source

  pub fn buf_ring_add(
    br: *linux.io_uring_buf_ring,
    buffer: []u8,
    buffer_id: u16,
    mask: u16,
    buffer_offset: u16,
) void {
    const bufs: [*]linux.io_uring_buf = @ptrCast(br);
    const buf: *linux.io_uring_buf = &bufs[(br.tail +% buffer_offset) & mask];

    buf.addr = @intFromPtr(buffer.ptr);
    buf.len = @intCast(buffer.len);
    buf.bid = buffer_id;
}  