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io_getevents (2)
IO_GETEVENTS(2) Linux Programmer's Manual IO_GETEVENTS(2)
NAME
io_getevents - read asynchronous I/O events from the completion queue
SYNOPSIS
#include <linux/time.h>
#include <libaio.h>
int io_getevents(aio_context_t ctx_id, long min_nr, long nr,
struct io_event *events, struct timespec *timeout);
Link with -laio.
DESCRIPTION
io_getevents() attempts to read at least min_nr events and up to nr
events from the completion queue of the AIO context specified by
ctx_id. timeout specifies the amount of time to wait for events, where
a NULL timeout waits until at least min_nr events have been seen. Note
that timeout is relative and will be updated if not NULL and the opera-
tion blocks.
RETURN VALUE
On success, io_getevents() returns the number of events read: 0 if no
events are available or < min_nr if the timeout has elapsed; on fail-
ure, it returns one of the errors listed under ERRORS.
ERRORS
EINVAL ctx_id is invalid. min_nr is out of range or nr is out of
range.
EFAULT Either events or timeout is an invalid pointer.
ENOSYS io_getevents() is not implemented on this architecture.
VERSIONS
The asynchronous I/O system calls first appeared in Linux 2.5, August
2002.
CONFORMING TO
io_getevents() is Linux specific and should not be used in programs
that are intended to be portable.
SEE ALSO
io_setup(2), io_submit(2), io_getevents(2), io_cancel(2), io_destroy(2)
Linux 2003-02-21 IO_GETEVENTS(2)
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