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\" $FreeBSD: /repoman/r/ncvs/src/lib/libc/sys/aio_suspend.2,v 1.22 2004/12/23 23:45:25 keramida Exp $
\"
Dd May 17, 2010
Dt AIO_SUSPEND 3
Os
Sh NAME
Nm aio_suspend
Nd suspend until asynchronous I/O operations or timeout complete (REALTIME)
Sh LIBRARY
Lb librt
Sh SYNOPSIS
In aio.h
Ft int
Fn aio_suspend "const struct aiocb * const list[]" "int nent" "const struct timespec * timeout"
Sh DESCRIPTION
The
Fn aio_suspend
system call suspends the calling process until at least one of the
specified asynchronous I/O requests have completed, a signal is
delivered, or the
Fa struct timeout
(see
Xr timespec 3 )
has passed.
Pp
The
Fa list
argument
is an array of
Fa nent
pointers to asynchronous I/O requests.
Array members containing
Dv NULL
pointers will be silently ignored.
Pp
If
Fa timeout
is not a
Dv NULL
pointer, it specifies a maximum interval to suspend.
If
Fa timeout
is a
Dv NULL
pointer, the suspend blocks indefinitely.
To effect a poll, the
Fa timeout
should point to a zero-value timespec structure.
Sh RETURN VALUES
If one or more of the specified asynchronous I/O requests have
completed,
Fn aio_suspend
returns 0.
Otherwise it returns \-1 and sets
Va errno
to indicate the error, as enumerated below.
Sh ERRORS
The
Fn aio_suspend
system call will fail if:
Bl -tag -width Er
It Bq Er EAGAIN
The
Fa timeout
expired before any I/O requests completed.
It Bq Er EINTR
The suspend was interrupted by a signal.
It Bq Er EINVAL
The
Fa list
argument
contains more than
Dv AIO_LISTIO_MAX
asynchronous I/O requests, or at least one of the requests is not
valid.
El
Sh SEE ALSO
Xr aio 3 ,
Xr timespec 3
Sh STANDARDS
The
Fn aio_suspend
system call
is expected to conform to the
St -p1003.1-2001
standard.
Sh HISTORY
The
Fn aio_suspend
system call first appeared in
Nx 5.0 .

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