NAME
aio_suspend —
suspend until asynchronous I/O
operations or timeout complete (REALTIME)
LIBRARY
library “libc”
SYNOPSIS
#include
<aio.h>
int
aio_suspend(const
struct aiocb *const iocbs[],
int niocb,
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
timeout has passed.
The iocbs argument is an array of niocb 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.
- [
EINVAL] - The iocbs argument contains more asynchronous I/O requests than the vfs.aio.max_aio_queue_per_proc sysctl(8) variable, 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_waitcomplete(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@softweyr.com>.