devela::_dep::nc

Function io_cancel

pub unsafe fn io_cancel(
    ctx_id: usize,
    iocb: &iocb_t,
    result: &mut io_event_t,
) -> Result<(), i32> ⓘ
Available on crate feature dep_nc only.
Expand description

Attempts to cancel an iocb previously passed to io_submit.

If the operation is successfully cancelled, the resulting event is copied into the memory pointed to by result without being placed into the completion queue and 0 is returned.

§Errors

  • May fail with -EFAULT if any of the data structures pointed to are invalid.
  • May fail with -EINVAL if aio_context specified by ctx_id is invalid.
  • May fail with -EAGAIN if the iocb specified was not cancelled.
  • Will fail with -ENOSYS if not implemented.