Section (2) io_cancel
io_cancel — cancel an outstanding asynchronous I/O operation
#include <linux/aio_abi.h> /* Defines needed types */
|struct iocb *iocb,|
|struct io_event *result
|There is no glibc wrapper for this system call; see NOTES.|
io_cancel() system call
attempts to cancel an asynchronous I/O operation previously
submitted with io_submit(2). The
describes the operation to be canceled and the
ctx_id argument is the AIO
context to which the operation was submitted. If the
operation is successfully canceled, the event will be copied
into the memory pointed to by
result without being placed
into the completion queue.
iocbspecified was not canceled.
One of the data structures points to invalid data.
The AIO context specified by
io_cancel() is not implemented on this architecture.
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. You could invoke it using syscall(2). But instead,
you probably want to use the
io_cancel() wrapper function provided by
Note that the
libaio wrapper function uses
a different type (io_context_t) for
Note also that the
libaio wrapper does not
follow the usual C library conventions for indicating errors:
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 syscall(2), then the return
value follows the usual conventions for indicating an error:
errno set to a
(positive) value that indicates the error.
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