NAME
aio_suspend —
suspend until
asynchronous I/O operations or timeout complete (REALTIME)
LIBRARY
POSIX Real-time Library (librt, -lrt)
SYNOPSIS
#include <aio.h>
int
aio_suspend(
const
struct aiocb * const list[],
int nent,
const struct timespec *
timeout);
DESCRIPTION
The
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
struct timeout (see
timespec(3)) has passed.
The
list argument is an array of
nent pointers to asynchronous I/O requests. Array
members containing
NULL
pointers will be silently
ignored.
If
timeout is not a
NULL
pointer,
it specifies a maximum interval to suspend. If
timeout
is a
NULL
pointer, the suspend blocks indefinitely. To
effect a poll, the
timeout should point to a zero-value
timespec structure.
RETURN VALUES
If one or more of the specified asynchronous I/O requests have completed,
aio_suspend() returns 0. Otherwise it returns -1 and sets
errno to indicate the error, as enumerated below.
ERRORS
The
aio_suspend() system call will fail if:
-
-
- [
EAGAIN
]
- The timeout expired before any I/O
requests completed.
-
-
- [
EINTR
]
- The suspend was interrupted by a signal.
-
-
- [
EINVAL
]
- The list argument contains more than
AIO_LISTIO_MAX
asynchronous I/O requests, or at
least one of the requests is not valid.
SEE ALSO
aio(3),
timespec(3)
STANDARDS
The
aio_suspend() system call is expected to conform to the
IEEE Std 1003.1-2001 (“POSIX.1”) standard.
HISTORY
The
aio_suspend() system call first appeared in
NetBSD 5.0.