AIO_SUSPEND(2)

NAME

     aio_suspend -- suspend until asynchronous I/O operations or timeout com-
     plete (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 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 will be silently ignored.

     If timeout is a non-nil pointer, it specifies a maximum interval to sus-
     pend.  If timeout is a nil pointer, the suspend blocks indefinitely.  To
     effect a poll, the timeout should point to a zero-value timespec struc-
     ture.

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 indi-
     cate 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 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_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>.