2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #include <sys/cdefs.h>
33 #include <sys/types.h>
34 #include <sys/syscall.h>
37 #include "namespace.h"
41 #include "sigev_thread.h"
42 #include "un-namespace.h"
44 __weak_reference(__aio_read, aio_read);
45 __weak_reference(__aio_readv, aio_readv);
46 __weak_reference(__aio_write, aio_write);
47 __weak_reference(__aio_writev, aio_writev);
48 __weak_reference(__aio_return, aio_return);
49 __weak_reference(__aio_waitcomplete, aio_waitcomplete);
50 __weak_reference(__aio_fsync, aio_fsync);
51 __weak_reference(__lio_listio, lio_listio);
53 typedef void (*aio_func)(union sigval val, struct aiocb *iocb);
55 extern int __sys_aio_read(struct aiocb *iocb);
56 extern int __sys_aio_readv(struct aiocb *iocb);
57 extern int __sys_aio_write(struct aiocb *iocb);
58 extern int __sys_aio_writev(struct aiocb *iocb);
59 extern ssize_t __sys_aio_waitcomplete(struct aiocb **iocbp, struct timespec *timeout);
60 extern ssize_t __sys_aio_return(struct aiocb *iocb);
61 extern int __sys_aio_error(struct aiocb *iocb);
62 extern int __sys_aio_fsync(int op, struct aiocb *iocb);
63 extern int __sys_lio_listio(int mode, struct aiocb * const list[], int nent,
64 struct sigevent *sig);
67 aio_dispatch(struct sigev_node *sn)
69 aio_func f = sn->sn_func;
71 f(sn->sn_value, (struct aiocb *)sn->sn_id);
75 aio_sigev_alloc(sigev_id_t id, struct sigevent *sigevent,
76 struct sigev_node **sn, struct sigevent *saved_ev)
78 if (__sigev_check_init()) {
79 /* This might be that thread library is not enabled. */
84 *sn = __sigev_alloc(SI_ASYNCIO, sigevent, NULL, 1);
90 *saved_ev = *sigevent;
92 __sigev_get_sigevent(*sn, sigevent, (*sn)->sn_id);
93 (*sn)->sn_dispatch = aio_dispatch;
96 __sigev_register(*sn);
97 __sigev_list_unlock();
103 aio_io(struct aiocb *iocb, int (*sysfunc)(struct aiocb *iocb))
105 struct sigev_node *sn;
106 struct sigevent saved_ev;
109 if (iocb->aio_sigevent.sigev_notify != SIGEV_THREAD) {
114 ret = aio_sigev_alloc((sigev_id_t)iocb, &iocb->aio_sigevent, &sn,
119 iocb->aio_sigevent = saved_ev;
123 __sigev_delete_node(sn);
124 __sigev_list_unlock();
131 __aio_read(struct aiocb *iocb)
134 return aio_io(iocb, &__sys_aio_read);
138 __aio_readv(struct aiocb *iocb)
141 return aio_io(iocb, &__sys_aio_readv);
145 __aio_write(struct aiocb *iocb)
148 return aio_io(iocb, &__sys_aio_write);
152 __aio_writev(struct aiocb *iocb)
155 return aio_io(iocb, &__sys_aio_writev);
159 __aio_waitcomplete(struct aiocb **iocbp, struct timespec *timeout)
164 ret = __sys_aio_waitcomplete(iocbp, timeout);
166 if ((*iocbp)->aio_sigevent.sigev_notify == SIGEV_THREAD) {
169 __sigev_delete(SI_ASYNCIO, (sigev_id_t)(*iocbp));
170 __sigev_list_unlock();
179 __aio_return(struct aiocb *iocb)
182 if (iocb->aio_sigevent.sigev_notify == SIGEV_THREAD) {
183 if (__sys_aio_error(iocb) == EINPROGRESS) {
185 * Fail with EINVAL to match the semantics of
186 * __sys_aio_return() for an in-progress
193 __sigev_delete(SI_ASYNCIO, (sigev_id_t)iocb);
194 __sigev_list_unlock();
197 return __sys_aio_return(iocb);
201 __aio_fsync(int op, struct aiocb *iocb)
203 struct sigev_node *sn;
204 struct sigevent saved_ev;
207 if (iocb->aio_sigevent.sigev_notify != SIGEV_THREAD)
208 return __sys_aio_fsync(op, iocb);
210 ret = aio_sigev_alloc((sigev_id_t)iocb, &iocb->aio_sigevent, &sn,
214 ret = __sys_aio_fsync(op, iocb);
215 iocb->aio_sigevent = saved_ev;
219 __sigev_delete_node(sn);
220 __sigev_list_unlock();
227 __lio_listio(int mode, struct aiocb * const list[], int nent,
228 struct sigevent *sig)
230 struct sigev_node *sn;
231 struct sigevent saved_ev;
234 if (sig == NULL || sig->sigev_notify != SIGEV_THREAD)
235 return (__sys_lio_listio(mode, list, nent, sig));
237 ret = aio_sigev_alloc((sigev_id_t)list, sig, &sn, &saved_ev);
240 ret = __sys_lio_listio(mode, list, nent, sig);
245 __sigev_delete_node(sn);
246 __sigev_list_unlock();