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AIO_CANCEL(3) |
Library Functions Manual |
AIO_CANCEL(3) |
NAME
aio_cancel — cancel an outstanding asynchronous I/O operation (REALTIME)
LIBRARY
POSIX Real-time Library (librt, -lrt)
SYNOPSIS
#include <aio.h>
int
aio_cancel(int fildes, struct aiocb * aiocbp);
DESCRIPTION
The
aio_cancel() system call cancels the outstanding asynchronous I/O request for the file descriptor specified in
fildes. If
aiocbp is specified, only that specific asynchronous I/O request is cancelled.
Normal asynchronous notification occurs for cancelled requests. Requests complete with an error result of ECANCELED.
RETURN VALUES
The
aio_cancel() system call returns -1 to indicate an error, or one of the following:
-
[AIO_CANCELED]
-
All outstanding requests meeting the criteria specified were cancelled.
-
[AIO_NOTCANCELED]
-
Some requests were not cancelled, status for the requests should be checked with aio_error(3).
-
[AIO_ALLDONE]
-
All of the requests meeting the criteria have finished.
ERRORS
An error return from
aio_cancel() indicates:
-
[EBADF]
-
The fildes argument is an invalid file descriptor.
STANDARDS
The aio_cancel() system call is expected to conform to the IEEE Std 1003.1-2001 (“POSIX.1”) standard.
HISTORY
The aio_cancel() system call first appeared in NetBSD 5.0.
