aio_suspend(2)

NAME

aio_suspend - suspend until asynchronous I/O operations or

timeout complete (REALTIME)

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <aio.h>
int
aio_suspend(const struct aiocb * const iocbs[], int niocb,
        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 complet

ed, a signal
is delivered, or the timeout has passed.

The iocbs argument is an array of niocb pointers to asyn

chronous I/O
requests. Array members containing null pointers will be

silently
ignored.

If timeout is not a null pointer, it specifies a maximum in

terval to suspend. If timeout is a null pointer, the suspend blocks in

definitely. 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 re

quests completed.

[EINVAL] The iocbs argument contains more than

AIO_LISTIO_MAX

asynchronous I/O requests, or at least

one of the
requests is not valid.

[EINTR] the suspend was interrupted by a signal.

SEE ALSO

aio_cancel(2), aio_error(2), aio_return(2), aio_waitcom

plete(2),
aio_write(2), aio(4)

STANDARDS

The aio_suspend() system call is expected to conform to the

IEEE Std
1003.1 (``POSIX.1'') standard.

HISTORY

The aio_suspend() system call first appeared in FreeBSD 3.0.

AUTHORS

This manual page was written by Wes Peters <wes@soft

weyr.com>.

BSD June 2, 1999

BSD