-/* Enqueue and list of read or write requests, 64bit offset version.
- Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+/* Enqueue and list of read or write requests.
+ Copyright (C) 2021-2024 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 Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#include <aio.h>
-#include <errno.h>
-#include <stdlib.h>
-
-#include "aio_misc.h"
-
-
-/* We need this special structure to handle asynchronous I/O. */
-struct async_waitlist
- {
- int counter;
- struct sigevent sigev;
- struct waitlist list[0];
- };
-
-
-int
-lio_listio64 (mode, list, nent, sig)
- int mode;
- struct aiocb64 *const list[];
- int nent;
- struct sigevent *sig;
-{
- struct requestlist *requests[nent];
- int cnt;
- volatile int total = 0;
- int result = 0;
-
- /* Check arguments. */
- if (mode != LIO_WAIT && mode != LIO_NOWAIT)
- {
- __set_errno (EINVAL);
- return -1;
- }
-
- /* Request the mutex. */
- pthread_mutex_lock (&__aio_requests_mutex);
-
- /* Now we can enqueue all requests. Since we already acquired the
- mutex the enqueue function need not do this. */
- for (cnt = 0; cnt < nent; ++cnt)
- if (list[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP)
- {
- requests[cnt] = __aio_enqueue_request ((aiocb_union *) list[cnt],
- (list[cnt]->aio_lio_opcode
- | 128));
- if (requests[cnt] != NULL)
- /* Successfully enqueued. */
- ++total;
- else
- /* Signal that we've seen an error. `errno' and the error code
- of the aiocb will tell more. */
- result = -1;
- }
-
- if (total == 0)
- {
- /* We don't have anything to do except signalling if we work
- asynchronously. */
- if (mode == LIO_NOWAIT)
- __aio_notify_only (sig);
- }
- else if (mode == LIO_WAIT)
- {
- pthread_cond_t cond;
- struct waitlist waitlist[nent];
- int oldstate;
-
- /* Initialize the conditional variable. */
- pthread_cond_init (&cond, NULL);
-
- total = 0;
- for (cnt = 0; cnt < nent; ++cnt)
- if (list[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP
- && requests[cnt] != NULL)
- {
- waitlist[cnt].cond = &cond;
- waitlist[cnt].next = requests[cnt]->waiting;
- waitlist[cnt].counterp = &total;
- waitlist[cnt].sigevp = NULL;
- requests[cnt]->waiting = &waitlist[cnt];
- ++total;
- }
-
- /* Since `pthread_cond_wait'/`pthread_cond_timedwait' are cancelation
- points we must be careful. We added entries to the waiting lists
- which we must remove. So defer cancelation for now. */
- pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &oldstate);
-
- while (total > 0)
- pthread_cond_wait (&cond, &__aio_requests_mutex);
-
- /* Now it's time to restore the cancelation state. */
- pthread_setcancelstate (oldstate, NULL);
-
- /* Release the conditional variable. */
- if (pthread_cond_destroy (&cond) != 0)
- /* This must never happen. */
- abort ();
- }
- else
- {
- struct async_waitlist *waitlist;
-
- waitlist = (struct async_waitlist *)
- malloc (sizeof (struct async_waitlist)
- + (nent * sizeof (struct waitlist)));
-
- if (waitlist == NULL)
- {
- __set_errno (EAGAIN);
- result = -1;
- }
- else
- {
- total = 0;
-
- for (cnt = 0; cnt < nent; ++cnt)
- if (list[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP
- && requests[cnt] != NULL)
- {
- waitlist->list[cnt].cond = NULL;
- waitlist->list[cnt].next = requests[cnt]->waiting;
- waitlist->list[cnt].counterp = &waitlist->counter;
- waitlist->list[cnt].sigevp = &waitlist->sigev;
- requests[cnt]->waiting = &waitlist->list[cnt];
- ++total;
- }
-
- waitlist->counter = total;
- waitlist->sigev = *sig;
- }
- }
-
- /* Release the mutex. */
- pthread_mutex_unlock (&__aio_requests_mutex);
-
- return result;
-}
+ 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, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <bits/wordsize.h>
+#if __WORDSIZE != 64
+# define AIOCB aiocb64
+# define LIO_LISTIO lio_listio64
+# define LIO_LISTIO_OLD __lio_listio64_21
+# define LIO_LISTIO_NEW __lio_listio64_24
+# define LIO_OPCODE_BASE 128
+
+# include <rt/lio_listio-common.c>
+#endif
projects / platform / upstream / glibc.git / blobdiff