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AIO_SUSPEND(2)              BSD System Calls Manual             AIO_SUSPEND(2)

     aio_suspend -- suspend until asynchronous I/O operations or timeout complete (REALTIME)

     Standard C Library (libc, -lc)

     #include <aio.h>

     aio_suspend(const struct aiocb *const list[], int nent, const struct timespec *timeout);

     The aio_suspend() system call suspends the calling process until at least one of the specified asyn-chronous asynchronous
     chronous I/O requests have completed, a signal is delivered, or the timeout has passed.

     The list argument is an array of nent 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 suspend.  If timeout is a nil
     pointer, the suspend blocks indefinitely.  To effect a poll, the timeout should point to a zero-value
     timespec structure.

     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.

     The aio_suspend() system call will fail if:

     [EAGAIN]           The timeout expired before any of the listed I/O requests completed.

     [EINTR]            The suspend was interrupted by a signal.

     [EINVAL]           The list argument contains more than AIO_LISTIO_MAX asynchronous I/O requests, or at
                        least one of the requests is not valid.

     aio_cancel(2), aio_error(2), aio_return(2), aio_write(2), aio(4)

     The aio_suspend() system call is expected to conform to the IEEE Std 1003.1 (``POSIX.1'') standard.

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

     This manual page was written by Wes Peters <>.

BSD                              June 2, 1999                              BSD

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