aio_suspend(3RT) Realtime Library Functions aio_suspend(3RT)
NAME
aio_suspend - wait for asynchronous I/O request
SYNOPSIS
cc [ flag... ] file... -lrt [ library... ]
#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 argu-
ment 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
operation is not equal to EINPROGRESS) at the time of the call, the function returns without suspending the calling thread. The list argu-
ment is an array of pointers to asynchronous I/O control blocks. The nent argument indicates the number of elements in the array. Each
aiocb structure pointed to will have been used in initiating an asynchronous I/O request via aio_read(3RT), aio_write(3RT), or lio_lis-
tio(3RT). This array may contain null pointers, which are ignored. If this array contains pointers that refer to aiocb structures that
have not been used in submitting asynchronous I/O, the effect is undefined.
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.
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 scanning the associated error and return status using aio_error(3RT) and
aio_return(3RT), 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.
EINTR A signal interrupted the aio_suspend() function. Since each asynchronous I/O operation might provoke a signal when it com-
pletes, 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 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 application 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(5).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Async-Signal-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
aio.h(3HEAD), aio_fsync(3RT), aio_read(3RT), aio_return(3RT), aio_write(3RT), lio_listio(3RT), signal.h(3HEAD), attributes(5), lf64(5)
NOTES
Solaris 2.6 was the first release to support the Asynchronous Input and Output option. Prior to this release, this function always returned
-1 and set errno to ENOSYS.
SunOS 5.10 21 Feb 2002 aio_suspend(3RT)