io_cancel - phpMan

IO_CANCEL(2)               Linux Programmer’s Manual              IO_CANCEL(2)



NAME
       io_cancel - Cancel an outstanding asynchronous I/O operation

SYNOPSIS
       #include <linux/aio.h>


       long io_cancel (aio_context_t ctx_id, struct iocb *iocb, struct io_event *result);


DESCRIPTION
       io_cancel  attempts  to  cancel  an asynchronous I/O operation previously submitted
       with the io_submit system call.  ctx_id is the AIO context ID of the  operation  to
       be  cancelled.   If  the AIO context is found, the event will be cancelled and then
       copied into the memory pointed to by result without being placed into  the  comple-
       tion queue.


RETURN VALUE
       io_cancel  returns  0 on success; otherwise, it returns one of the errors listed in
       the "Errors" section.


ERRORS
       EINVAL The AIO context specified by ctx_id is invalid.


       EFAULT One of the data structures points to invalid data.


       EAGAIN The iocb specified was not cancelled.


       ENOSYS io_cancel is not implemented on this architecture.


VERSIONS
       The asynchronous I/O system calls first appeared in Linux 2.5, August 2002.


CONFORMING TO
       io_cancel is Linux specific and should not be used in programs that are intended to
       be portable.


SEE ALSO
       io_setup(2), io_destroy(2), io_getevents(2), io_submit(2).


NOTES
       The asynchronous I/O system calls were written by Benjamin LaHaise.


AUTHOR
       Kent Yoder.



Linux 2.4                         2003-02-21                      IO_CANCEL(2)

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