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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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AIO_CANCEL(3P) POSIX Programmer's Manual AIO_CANCEL(3P)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
aio_cancel — cancel an asynchronous I/O request
#include <aio.h>
int aio_cancel(int fildes, struct aiocb *aiocbp);
The aio_cancel() function shall attempt to cancel one or more
asynchronous I/O requests currently outstanding against file
descriptor fildes. The aiocbp argument points to the
asynchronous I/O control block for a particular request to be
canceled. If aiocbp is NULL, then all outstanding cancelable
asynchronous I/O requests against fildes shall be canceled.
Normal asynchronous notification shall occur for asynchronous I/O
operations that are successfully canceled. If there are requests
that cannot be canceled, then the normal asynchronous completion
process shall take place for those requests when they are
completed.
For requested operations that are successfully canceled, the
associated error status shall be set to [ECANCELED] and the
return status shall be -1. For requested operations that are not
successfully canceled, the aiocbp shall not be modified by
aio_cancel().
If aiocbp is not NULL, then if fildes does not have the same
value as the file descriptor with which the asynchronous
operation was initiated, unspecified results occur.
Which operations are cancelable is implementation-defined.
The aio_cancel() function shall return the value AIO_CANCELED if
the requested operation(s) were canceled. The value
AIO_NOTCANCELED shall be returned if at least one of the
requested operation(s) cannot be canceled because it is in
progress. In this case, the state of the other operations, if
any, referenced in the call to aio_cancel() is not indicated by
the return value of aio_cancel(). The application may determine
the state of affairs for these operations by using aio_error().
The value AIO_ALLDONE is returned if all of the operations have
already completed. Otherwise, the function shall return -1 and
set errno to indicate the error.
The aio_cancel() function shall fail if:
EBADF The fildes argument is not a valid file descriptor.
The following sections are informative.
None.
None.
None.
None.
aio_read(3p), aio_write(3p)
The Base Definitions volume of POSIX.1‐2017, aio.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any
discrepancy between this version and the original IEEE and The
Open Group Standard, the original IEEE and The Open Group
Standard is the referee document. The original Standard can be
obtained online at http://www.opengroup.org/unix/online.html .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of
the source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 AIO_CANCEL(3P)
Pages that refer to this page: aio.h(0p), aio_error(3p), aio_read(3p), aio_return(3p), aio_write(3p), lio_listio(3p)
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HTML rendering created 2023-12-22 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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