1 /* Notify initiator of AIO request.
2 Copyright (C) 1997,98,99,2000,01 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
28 notify_func_wrapper (void *arg)
30 struct sigevent *sigev = arg;
31 sigev->sigev_notify_function (sigev->sigev_value);
38 __aio_notify_only (struct sigevent *sigev, pid_t caller_pid)
42 /* Send the signal to notify about finished processing of the request. */
43 if (sigev->sigev_notify == SIGEV_THREAD)
45 /* We have to start a thread. */
47 pthread_attr_t attr, *pattr;
49 pattr = (pthread_attr_t *) sigev->sigev_notify_attributes;
52 pthread_attr_init (&attr);
53 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
57 if (pthread_create (&tid, pattr, notify_func_wrapper, sigev) < 0)
60 else if (sigev->sigev_notify == SIGEV_SIGNAL)
62 /* We have to send a signal. */
63 #if _POSIX_REALTIME_SIGNALS
64 /* Note that the standard gives us the option of using a plain
65 non-queuing signal here when SA_SIGINFO is not set for the signal. */
66 if (__aio_sigqueue (sigev->sigev_signo, sigev->sigev_value, caller_pid)
70 /* There are no queued signals on this system at all. */
71 result = raise (sigev->sigev_signo);
81 __aio_notify (struct requestlist *req)
83 struct waitlist *waitlist;
84 struct aiocb *aiocbp = &req->aiocbp->aiocb;
86 if (__aio_notify_only (&aiocbp->aio_sigevent, req->caller_pid) != 0)
88 /* XXX What shall we do if already an error is set by
90 aiocbp->__error_code = errno;
91 aiocbp->__return_value = -1;
94 /* Now also notify possibly waiting threads. */
95 waitlist = req->waiting;
96 while (waitlist != NULL)
98 struct waitlist *next = waitlist->next;
100 /* Decrement the counter. This is used in both cases. */
101 --*waitlist->counterp;
103 if (waitlist->sigevp == NULL)
104 pthread_cond_signal (waitlist->cond);
106 /* This is part of a asynchronous `lio_listio' operation. If
107 this request is the last one, send the signal. */
108 if (*waitlist->counterp == 0)
110 __aio_notify_only (waitlist->sigevp, waitlist->caller_pid);
111 /* This is tricky. See lio_listio.c for the reason why
113 free ((void *) waitlist->counterp);