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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | VERSIONS | ATTRIBUTES | CONFORMING TO | EXAMPLE | SEE ALSO | COLOPHON |
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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. (See aio(7) for a
description of the aiocb structure.)
Normal asynchronous notification occurs for canceled requests (see
aio(7) and sigevent(7)). The request return status (aio_return(3))
is set to -1, and the request error status (aio_error(3)) is set to
ECANCELED. The control block of requests that cannot be canceled is
not changed.
If the request could not be canceled, then it will terminate in the
usual way after performing the I/O operation. (In this case,
aio_error(3) will return the status EINPROGRESSS.)
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 cancelable is implementation-defined.
The aio_cancel() function returns one of the following values:
AIO_CANCELED
All requests were successfully canceled.
AIO_NOTCANCELED
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).
AIO_ALLDONE
All requests had already been completed before the call.
-1 An error occurred. The cause of the error can be found by
inspecting errno.
EBADF fd is not a valid file descriptor.
ENOSYS aio_cancel() is not implemented.
The aio_cancel() function is available since glibc 2.1.
For an explanation of the terms used in this section, see
attributes(7).
┌─────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├─────────────┼───────────────┼─────────┤
│aio_cancel() │ Thread safety │ MT-Safe │
└─────────────┴───────────────┴─────────┘
POSIX.1-2001, POSIX.1-2008.
See aio(7).
aio_error(3), aio_fsync(3), aio_read(3), aio_return(3),
aio_suspend(3), aio_write(3), lio_listio(3), aio(7)
This page is part of release 4.15 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
2015-03-02 AIO_CANCEL(3)
Pages that refer to this page: aio_error(3), aio_fsync(3), aio_read(3), aio_return(3), aio_suspend(3), aio_write(3), lio_listio(3), aio(7)
Copyright and license for this manual page
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