NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | CONFORMING TO | SEE ALSO | COLOPHON
AIO_CANCEL(3) Linux Programmer's Manual AIO_CANCEL(3)
aio_cancel - cancel an outstanding asynchronous I/O request
#include <aio.h>
int aio_cancel(int fd, struct aiocb *aiocbp);
Link with -lrt.
The aio_cancel() function attempts to cancel outstanding asynchronous I/O
requests for the file descriptor fd. If aiocbp is NULL, all such requests are
canceled. Otherwise, only the request described by the control block pointed
to by aiocbp is canceled.
Normal asynchronous notification occurs for canceled requests. The request
return status is set to -1, and the request error status is set to ECANCELED.
The control block of requests that cannot be canceled is not changed.
If aiocbp is not NULL, and fd differs from the file descriptor with which the
asynchronous operation was initiated, unspecified results occur.
Which operations are cancellable is implementation-defined.
This function returns AIO_CANCELED if all requests were successfully canceled.
It returns AIO_NOTCANCELED when at least one of the requests specified was not
canceled because it was in progress. In this case one may check the status of
individual requests using aio_error(3). This function returns AIO_ALLDONE
when all requests had been completed already before this call. When some
error occurs, -1 is returned, and errno is set appropriately.
EBADF fd is not a valid file descriptor.
POSIX.1-2001.
aio_error(3), aio_fsync(3), aio_read(3), aio_return(3), aio_suspend(3),
aio_write(3)
This page is part of release 3.23 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can be found
at http://www.kernel.org/doc/man-pages/.
2003-11-14 AIO_CANCEL(3)