aio_suspend, aio_suspend64 - wait for an asynchronous I/O request
int aio_suspend(const aiocb_t * const aiocbp, int cnt, const timespec_t *timeout);
int aio_suspend64(const aiocb64_t * const aiocbp, int cnt, const timespec_t *timeout);
The aio_suspend() function shall suspend the calling thread until at
least one of the asynchronous I/O operations referenced by the aiocbp
argument has completed, until a signal interrupts the function, or if
timeout is not NULL, until the time interval specified by timeout has
passed. If any of the aiocb structures in the list correspond to the
completed asynchronous I/O operations(i.e., the error status for the
operation is not equal to EINPROGRESS, at the time of the call), the
function shall return without suspending the calling thread. The aiocbp
argument points to an array of pointers to asynchronous I/O control
blocks. The cnt argument indicates the number of elements in the array.
Each aiocb structure pointed to shall have been used in initiating an
asynchronous I/O request via aio_read(), aio_write(), or lio_listio().
This array may contain NULL pointers which shall be ignored. If this
array contains pointers that refer to aiocb structures which have not
been used in submitting asynchronous I/O, the effect is undefined.
The aio_suspend64() function is identical to aio_suspend() except that it
takes an array of aiocb64_t * (see <aio.h>). This structure allows for
the specification of a file offset greater than 2 Gigabytes. The user
must define _ABI_SOURCE and include -labi to access the aio64 routines.
If the time interval indicated in the timespec structure pointed to by
timeout passes before any of the I/O operations referenced by aiocbp are
completed, then aio_suspend() shall return with an error.
aio_read(3), aio_write(3), lio_listio(3), aio_sgi_init(3)
If the aio_suspend() function returns after one or more asynchronous I/O
operations has completed, zero is returned.
The application may determine which asynchronous I/O completed by
scanning the associated error and return status, using aio_error(3) and
If any of the following conditions occur, the aio_suspend() function
shall return -1 and set errno to the corresponding value.
[EAGAIN] No asynchronous I/O indicated in the list referenced by
aiocbp completed in the time interval indicated by
[EINTR] A signal interrupted the aio_suspend() function. Note
that, since each asynchronous I/O operation may possibly
provoke a signal when it completes, this error return may
be caused by the completion of one (or more) of the very
I/O operation being awaited.
[EAGAIN] The system was short of resources and unable to wait for
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