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aio_suspend(3c)
aio_suspend(3C) Standard C Library Functions aio_suspend(3C)
NAME
aio_suspend - wait for asynchronous I/O request
SYNOPSIS
#include <aio.h>
int aio_suspend(const struct aiocb * const list[], int nent,
const struct timespec *timeout);
DESCRIPTION
The aio_suspend() function suspends the calling thread until at least
one of the asynchronous I/O operations referenced by the list 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 completed
asynchronous I/O operations (that is, the error status for the opera‐
tion is not equal to EINPROGRESS) at the time of the call, the function
returns without suspending the calling thread. If there are no out‐
standing asynchronous I/O operations, aio_suspend() returns immediately
with EAGAIN. The list argument is an array of pointers to asynchronous
I/O control blocks. The nent argument indicates the number of elements
in the array and is limited to _AIO_LISTIO_MAX = 4096. Each aiocb
structure pointed to will have been used in initiating an asynchronous
I/O request via aio_read(3C), aio_write(3C), or lio_listio(3C). This
array may contain null pointers, which are ignored. If this array con‐
tains pointers that refer to aiocb structures that have not been used
in submitting asynchronous I/O, the effect is undefined. If there are
no outstanding asynchronous I/O operations, aio_suspend() returns imme‐
diately with EAGAIN.
If the time interval indicated in the timespec structure pointed to by
timeout passes before any of the I/O operations referenced by list are
completed, then aio_suspend() returns with an error. If this array con‐
tains pointers that refer to aiocb structures that have not been used
in submitting asynchronous I/O, the effect is undefined.
RETURN VALUES
If aio_suspend() returns after one or more asynchronous I/O operations
have completed, it returns 0. Otherwise, it returns −1, and sets errno
to indicate the error.
The application may determine which asynchronous I/O completed by scan‐
ning the associated error and return status using aio_error(3C) and
aio_return(3C), respectively.
ERRORS
The aio_suspend() function will fail if:
EAGAIN No asynchronous I/O indicated in the list referenced by list
completed in the time interval indicated by timeout.
There are no asynchronous I/O operations.
EINTR A signal interrupted the aio_suspend() function. Since each
asynchronous I/O operation might provoke a signal when it
completes, this error return can be caused by the completion
of one or more of the very I/O operations being awaited.
EINVAL The nent argument is less than or equal to 0 or greater than
_AIO_LISTIO_MAX, or the timespec structure pointed to by
timeout is not properly set because tv_sec is less than 0 or
tv_nsec is either less than 0 or greater than 10^9.
ENOMEM There is currently not enough available memory; the applica‐
tion can try again later.
ENOSYS The aio_suspend() function is not supported by the system.
USAGE
The aio_suspend() function has a transitional interface for 64-bit file
offsets. See lf64(7).
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelAsync-Signal-
Safe _ StandardSee standards(7).
SEE ALSO
aio_fsync(3C), aio_read(3C), aio_return(3C), aio_write(3C), lio_lis‐
tio(3C), aio.h(3HEAD), signal.h(3HEAD), attributes(7), lf64(7), stan‐
dards(7)
Oracle Solaris 11.4 31 Jan 2012 aio_suspend(3C)