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 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>.

Debian                                            Oct 23, 2017                                    AIO_SUSPEND(2)