Section (3) aio_suspend
aio_suspend — wait for asynchronous I/O operation or timeout
||const struct aiocb * const aiocb_list,|
|const struct timespec *timeout
suspends the calling thread until one of the following
One or more of the asynchronous I/O requests in the list
A signal is delivered.
timeoutis not NULL and the specified time interval has passed. (For details of the timespec structure, see nanosleep(2).)
argument specifies the number of items in
aiocb_list. Each item in the
list pointed to by
aiocb_list must be either NULL
(and then is ignored), or a pointer to a control block on
which I/O was initiated using aio_read(3), aio_write(3), or lio_listio(3). (See
aio(7) for a description of
the aiocb structure.)
supported, this clock is used to measure the timeout interval
If this function returns after completion of one of the
I/O requests specified in
aiocb_list, 0 is returned.
Otherwise, −1 is returned, and
errno is set to indicate the error.
The call timed out before any of the indicated operations had completed.
The call was ended by signal (possibly the completion signal of one of the operations we were waiting for); see signal(7).
aio_suspend() is not implemented.
For an explanation of the terms used in this section, see attributes(7).
One can achieve polling by using a non-NULL
timeout that specifies a zero
If one or more of the asynchronous I/O operations
aiocb_list has already
completed at the time of the call to
aio_suspend(), then the call returns
To determine which I/O operations have completed after a
successful return from
aio_suspend(), use aio_error(3) to scan the
list of aiocb structures
pointed to by
The glibc implementation of
aio_suspend() is not async-signal-safe, in
violation of the requirements of POSIX.1.
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