aio_suspend(3)

NAME
     aio_suspend, aio_suspend64 - wait for an asynchronous I/O request

C SYNOPSIS
     #include <aio.h>

     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);

DESCRIPTION
     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.

SEE ALSO
     aio_read(3), aio_write(3), lio_listio(3), aio_sgi_init(3)

DIAGNOSTICS
     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
     aio_return(3), respectively.

     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
                    timeout.

     [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
                    I/O.