2 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/cdefs.h>
31 #include <sys/types.h>
32 #include <sys/syscall.h>
35 #include "namespace.h"
39 #include "sigev_thread.h"
40 #include "un-namespace.h"
42 __weak_reference(__aio_read, aio_read);
43 __weak_reference(__aio_write, aio_write);
44 __weak_reference(__aio_return, aio_return);
45 __weak_reference(__aio_waitcomplete, aio_waitcomplete);
46 __weak_reference(__aio_fsync, aio_fsync);
48 typedef void (*aio_func)(union sigval val, struct aiocb *iocb);
50 extern int __sys_aio_read(struct aiocb *iocb);
51 extern int __sys_aio_write(struct aiocb *iocb);
52 extern ssize_t __sys_aio_waitcomplete(struct aiocb **iocbp, struct timespec *timeout);
53 extern ssize_t __sys_aio_return(struct aiocb *iocb);
54 extern int __sys_aio_error(struct aiocb *iocb);
55 extern int __sys_aio_fsync(int op, struct aiocb *iocb);
58 aio_dispatch(struct sigev_node *sn)
60 aio_func f = sn->sn_func;
62 f(sn->sn_value, (struct aiocb *)sn->sn_id);
66 aio_sigev_alloc(struct aiocb *iocb, struct sigev_node **sn,
67 struct sigevent *saved_ev)
69 if (__sigev_check_init()) {
70 /* This might be that thread library is not enabled. */
75 *sn = __sigev_alloc(SI_ASYNCIO, &iocb->aio_sigevent, NULL, 1);
81 *saved_ev = iocb->aio_sigevent;
82 (*sn)->sn_id = (sigev_id_t)iocb;
83 __sigev_get_sigevent(*sn, &iocb->aio_sigevent, (*sn)->sn_id);
84 (*sn)->sn_dispatch = aio_dispatch;
87 __sigev_register(*sn);
88 __sigev_list_unlock();
94 aio_io(struct aiocb *iocb, int (*sysfunc)(struct aiocb *iocb))
96 struct sigev_node *sn;
97 struct sigevent saved_ev;
100 if (iocb->aio_sigevent.sigev_notify != SIGEV_THREAD) {
105 ret = aio_sigev_alloc(iocb, &sn, &saved_ev);
109 iocb->aio_sigevent = saved_ev;
113 __sigev_delete_node(sn);
114 __sigev_list_unlock();
121 __aio_read(struct aiocb *iocb)
124 return aio_io(iocb, &__sys_aio_read);
128 __aio_write(struct aiocb *iocb)
131 return aio_io(iocb, &__sys_aio_write);
135 __aio_waitcomplete(struct aiocb **iocbp, struct timespec *timeout)
140 ret = __sys_aio_waitcomplete(iocbp, timeout);
142 if ((*iocbp)->aio_sigevent.sigev_notify == SIGEV_THREAD) {
145 __sigev_delete(SI_ASYNCIO, (sigev_id_t)(*iocbp));
146 __sigev_list_unlock();
155 __aio_return(struct aiocb *iocb)
158 if (iocb->aio_sigevent.sigev_notify == SIGEV_THREAD) {
159 if (__sys_aio_error(iocb) == EINPROGRESS) {
161 * Fail with EINVAL to match the semantics of
162 * __sys_aio_return() for an in-progress
169 __sigev_delete(SI_ASYNCIO, (sigev_id_t)iocb);
170 __sigev_list_unlock();
173 return __sys_aio_return(iocb);
177 __aio_fsync(int op, struct aiocb *iocb)
179 struct sigev_node *sn;
180 struct sigevent saved_ev;
183 if (iocb->aio_sigevent.sigev_notify != SIGEV_THREAD)
184 return __sys_aio_fsync(op, iocb);
186 ret = aio_sigev_alloc(iocb, &sn, &saved_ev);
189 ret = __sys_aio_fsync(op, iocb);
190 iocb->aio_sigevent = saved_ev;
194 __sigev_delete_node(sn);
195 __sigev_list_unlock();