Provided by: manpages-dev_2.17-1_all
io_cancel - Cancel an outstanding asynchronous I/O operation
long io_cancel (aio_context_t ctx_id, struct iocb *iocb,
struct io_event *result);
io_cancel() attempts to cancel an asynchronous I/O operation previously
submitted with the io_submit system call. ctx_id is the AIO context ID
of the operation to be cancelled. If the AIO context is found, the
event will be cancelled and then copied into the memory pointed to by
result without being placed into the completion queue.
io_cancel() returns 0 on success; otherwise, it returns one of the
errors listed in the "Errors" section.
EINVAL The AIO context specified by ctx_id is invalid.
EFAULT One of the data structures points to invalid data.
EAGAIN The iocb specified was not cancelled.
ENOSYS io_cancel() is not implemented on this architecture.
The asynchronous I/O system calls first appeared in Linux 2.5, August
io_cancel() is Linux specific and should not be used in programs that
are intended to be portable.
io_setup(2), io_destroy(2), io_getevents(2), io_submit(2).
The asynchronous I/O system calls were written by Benjamin LaHaise.