NAME
aio_suspend —
suspend until asynchronous I/O
operations or timeout complete (REALTIME)
LIBRARY
library “librt”
SYNOPSIS
#include
<aio.h>
int
aio_suspend(const
struct aiocb * const list[],
int nent,
const struct timespec *
timeout);
DESCRIPTION
Theaio_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_MAXasynchronous I/O requests, or at least one of the requests is not valid.
SEE ALSO
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.