Section: Linux Programmer's Manual (2)Updated: 2008-06-18Local indexUp
io_cancel - cancel an outstanding asynchronous I/O operation
#include <libaio.h>int io_cancel(aio_context_t ctx_id, struct iocb *iocb, struct io_event *result);
Link with -laio.
attempts to cancel an asynchronous I/O operation previously submitted with
ctx_id is the AIO context ID of the operation to be canceled.
If the AIO context is found, the event will be canceled and then copied
into the memory pointed to by result without being placed
into the completion queue.
For the failure return, see NOTES.
The iocb specified was not canceled.
One of the data structures points to invalid data.
The AIO context specified by ctx_id is invalid.
is not implemented on this architecture.
The asynchronous I/O system calls first appeared in Linux 2.5, August 2002.
is Linux-specific and should not be used
in programs that are intended to be portable.
Glibc does not provide a wrapper function for this system call.
The wrapper provided in
does not follow the usual C library conventions for indicating error:
on error it returns a negated error number
(the negative of one of the values listed in ERRORS).
If the system call is invoked via
then the return value follows the usual conventions for
indicating an error: -1, with
set to a (positive) value that indicates the error.