aio_cancel - phpMan

AIO_CANCEL(3)              Linux Programmer’s Manual             AIO_CANCEL(3)



NAME
       aio_cancel - cancel an outstanding asynchronous I/O request

SYNOPSIS
       #include <aio.h>

       int aio_cancel(int fd, struct aiocb *aiocbp);


DESCRIPTION
       The  aio_cancel  function  attempts to cancel outstanding asynchronous I/O requests
       for the file descriptor fd.  If aiocbp is NULL, all such  requests  are  cancelled.
       Otherwise,  only the request described by the control block pointed to by aiocbp is
       cancelled.

       Normal asynchronous notification occurs for cancelled requests.  The request return
       status is set to -1, and the request error status is set to ECANCELED.  The control
       block of requests that cannot be cancelled is not changed.

       If aiocbp is not NULL, and fd differs from the file descriptor with which the asyn-
       chronous operation was initiated, unspecified results occur.

       Which operations are cancelable is implementation-defined.

RETURN VALUE
       This  function returns AIO_CANCELED if all requests were successfully cancelled. It
       returns AIO_NOTCANCELED when at least one of the requests specified  was  not  can-
       celled  because it was in progress.  In this case one may check the status of indi-
       vidual requests using aio_error(3).  This function  returns  AIO_ALLDONE  when  all
       requests  had  been completed already before this call.  When some error occurs, -1
       is returned, and errno is set appropriately.

ERRORS
       EBADF  fd is not a valid file descriptor.

CONFORMING TO
       POSIX 1003.1-2003

SEE ALSO
       aio_error(3),    aio_fsync(3),    aio_read(3),    aio_return(3),    aio_suspend(3),
       aio_write(3)



                                  2003-11-14                     AIO_CANCEL(3)

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