Provided by: manpages-dev_2.77-1_all
io_cancel - cancel an outstanding asynchronous I/O operation
int io_cancel(aio_context_t ctx_id, struct iocb *iocb,
struct io_event *result);
Link with -laio.
io_cancel() attempts to cancel an asynchronous I/O operation previously
submitted with io_submit(2). ctx_id is the AIO context ID of the
operation to be canceled. If the AIO context is found, the event will
be canceled and then copied into the memory pointed to by result
without being placed into the completion queue.
io_cancel() returns 0 on success; on failure, it returns one of the
errors listed under ERRORS.
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 canceled.
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)
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