io_getevents man page on CentOS

io_getevents man page on CentOS

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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>

       long io_getevents (aio_context_t ctx_id, long min_nr, long nr,
			  struct io_event *events, struct timespec *timeout);

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
       io_getevents()  returns	the  number of events read: 0 if no events are
       available or < min_nr if the timeout has elapsed.

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.

CONFORMING TO
       io_getevents() is Linux specific and should not	be  used  in  programs
       that are intended to be portable.

VERSIONS
       The  asynchronous  I/O system calls first appeared in Linux 2.5, August
       2002.

SEE ALSO
       io_setup(2),  io_submit(2),   io_getevents(2),	io_cancel(2),	io_de‐
       stroy(2).

NOTES
       The asynchronous I/O system calls were written by Benjamin LaHaise.

AUTHOR
       Kent Yoder.

Linux 2.4			  2003-02-21		       IO_GETEVENTS(2)

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