diff options
Diffstat (limited to 'rtkaio/sysdeps/unix/sysv/linux/kaio_cancel.c')
| -rw-r--r-- | rtkaio/sysdeps/unix/sysv/linux/kaio_cancel.c | 238 |
1 files changed, 0 insertions, 238 deletions
diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_cancel.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_cancel.c deleted file mode 100644 index 7d2738d5bc..0000000000 --- a/rtkaio/sysdeps/unix/sysv/linux/kaio_cancel.c +++ /dev/null @@ -1,238 +0,0 @@ -/* Cancel requests associated with given file descriptor. - Copyright (C) 1997, 1998, 2000, 2002, 2003, 2005 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -/* We use an UGLY hack to prevent gcc from finding us cheating. The - implementation of aio_cancel and aio_cancel64 are identical and so - we want to avoid code duplication by using aliases. But gcc sees - the different parameter lists and prints a warning. We define here - a function so that aio_cancel64 has no prototype. */ -#ifndef aio_cancel -#define aio_cancel64 XXX -#include <aio.h> -/* And undo the hack. */ -#undef aio_cancel64 -#endif - -#include <kaio_misc.h> - -#ifndef USE_KAIO -#include <aio_cancel.c> -#else - -#include <assert.h> -#include <errno.h> - -int -aio_cancel (fildes, aiocbp) - int fildes; - struct aiocb *aiocbp; -{ - struct requestlist *req = NULL; - int result = AIO_ALLDONE; - - /* If fildes is invalid, error. */ - if (fcntl (fildes, F_GETFL) < 0) - { - __set_errno (EBADF); - return -1; - } - - /* Request the mutex. */ - pthread_mutex_lock (&__aio_requests_mutex); - - /* We are asked to cancel a specific AIO request. */ - if (aiocbp != NULL) - { - /* If the AIO request is not for this descriptor it has no value - to look for the request block. */ - if (aiocbp->aio_fildes != fildes) - { - pthread_mutex_unlock (&__aio_requests_mutex); - __set_errno (EINVAL); - return -1; - } - else if (aiocbp->__error_code == EINPROGRESS) - { - struct requestlist *last = NULL; - - req = __aio_find_req_fd (fildes); - - if (req != NULL) - while (req->aiocbp != (aiocb_union *) aiocbp) - { - last = req; - req = req->next_prio; - if (req == NULL) - break; - } - - if (req != NULL) - { - /* Don't remove the entry if a thread is already working on - it. */ - if (req->running == allocated) - { - result = AIO_NOTCANCELED; - req = NULL; - } - else - { - /* We can remove the entry. */ - __aio_remove_request (last, req, 0); - - result = AIO_CANCELED; - - req->next_prio = NULL; - } - } - else - { - /* Try kernel requests. */ - req = __aio_find_req ((aiocb_union *) aiocbp); - - if (req == NULL) - { - pthread_mutex_unlock (&__aio_requests_mutex); - __set_errno (EINVAL); - return -1; - } - - assert (req->kioctx != KCTX_NONE); - - /* If kernel is working on it, try cancelling it. */ - if (req->running == allocated) - { - struct kio_event ev; - INTERNAL_SYSCALL_DECL (err); - int res; - - res = INTERNAL_SYSCALL (io_cancel, err, 3, __aio_kioctx, - &req->kiocb, &ev); - if (INTERNAL_SYSCALL_ERROR_P (res, err)) - { - result = AIO_NOTCANCELED; - req = NULL; - } - else - req->running = queued; - } - if (req != NULL) - { - /* We can remove the entry. */ - __aio_remove_krequest (req); - result = AIO_CANCELED; - req->next_prio = NULL; - } - } - } - } - else - { - /* Find the beginning of the list of all requests for this - desriptor. */ - req = __aio_find_req_fd (fildes); - - /* If any request is worked on by a thread it must be the first. - So either we can delete all requests or all but the first. */ - if (req != NULL) - { - if (req->running == allocated) - { - struct requestlist *old = req; - req = req->next_prio; - old->next_prio = NULL; - - result = AIO_NOTCANCELED; - - if (req != NULL) - __aio_remove_request (old, req, 1); - } - else - { - result = AIO_CANCELED; - - /* We can remove the entry. */ - __aio_remove_request (NULL, req, 1); - } - } - - if (result != AIO_NOTCANCELED) - { - /* Try to cancel kernel requests. */ - struct requestlist *kreq = __aio_find_kreq_fd (fildes); - - while (kreq) - { - struct requestlist *next; - - /* If kernel is working on it, try cancelling it. */ - if (kreq->running == allocated) - { - struct kio_event ev; - INTERNAL_SYSCALL_DECL (err); - int res; - - res = INTERNAL_SYSCALL (io_cancel, err, 3, __aio_kioctx, - &kreq->kiocb, &ev); - if (INTERNAL_SYSCALL_ERROR_P (res, err)) - { - result = AIO_NOTCANCELED; - break; - } - else - kreq->running = queued; - } - next = kreq->next_prio; - __aio_remove_krequest (kreq); - result = AIO_CANCELED; - kreq->next_prio = NULL; - assert (kreq->running == yes || kreq->running == queued); - kreq->aiocbp->aiocb.__error_code = ECANCELED; - kreq->aiocbp->aiocb.__return_value = -1; - __aio_notify (kreq); - __aio_free_request (kreq); - kreq = next; - } - } - } - - /* Mark requests as canceled and send signal. */ - while (req != NULL) - { - struct requestlist *old = req; - assert (req->running == yes || req->running == queued); - req->aiocbp->aiocb.__error_code = ECANCELED; - req->aiocbp->aiocb.__return_value = -1; - __aio_notify (req); - req = req->next_prio; - __aio_free_request (old); - } - - /* Release the mutex. */ - pthread_mutex_unlock (&__aio_requests_mutex); - - return result; -} - -#ifndef aio_cancel -weak_alias (aio_cancel, aio_cancel64) -#endif - -#endif |