This procedure aborts an I/O operation. If the I/O operation has already completed, calling AbortIO() has no effect. If it is not complete, it will be aborted.
A task should call WaitIO() immediately after calling AbortIO(). When WaitIO() returns, the task knows that the I/O operation is no longer active. It can then confirm that the I/O operation was aborted before it was finished by checking the io_Error field of the IOReq structure. If the operation aborted, the value of this field is ER_Aborted.
Arguments
ior
The item number of the I/O request to abort.
Return Value
The procedure returns 0 if the I/O operation was successfully aborted or an error code (a negative value) if an error occurs. Possible error codes include:
BADITEM
The ior argument is not an IOReq.
NOTOWNER
The ior argument is an IOReq but the calling task is not its owner.