Provided by: manpages-dev_2.77-1_all
io_setup - create an asynchronous I/O context
int io_setup(unsigned nr_events, aio_context_t *ctxp);
Link with -laio.
io_setup() creates an asynchronous I/O context capable of receiving at
least nr_events. ctxp must not point to an AIO context that already
exists, and must be initialized to 0 prior to the call. On successful
creation of the AIO context, *ctxp is filled in with the resulting
io_setup() returns 0 on success; on failure, it returns one of the
errors listed under ERRORS.
EINVAL ctxp is not initialized, or the specified nr_events exceeds
internal limits. nr_events should be greater than 0.
EFAULT An invalid pointer is passed for ctxp.
ENOMEM Insufficient kernel resources are available.
EAGAIN The specified nr_events exceeds the user’s limit of available
ENOSYS io_setup() is not implemented on this architecture.
The asynchronous I/O system calls first appeared in Linux 2.5, August
io_setup() is Linux-specific and should not be used in programs that
are intended to be portable.
io_destroy(2), io_getevents(2), io_submit(2), io_cancel(2)
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