1 /* $OpenBSD: uthread_kevent.c,v 1.4 2003/10/19 05:27:03 brad Exp $ */
2
3 /*-
4 * Copyright (c) 2000 Jonathan Lemon <jlemon@flugsvamp.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: uthread_kevent.c,v 1.6 2001/12/08 00:53:37 sobomax Exp $
29 */
30
31 #include <unistd.h>
32 #include <errno.h>
33 #include <sys/types.h>
34 #include <sys/time.h>
35 #include <sys/event.h>
36 #ifdef _THREAD_SAFE
37 #include <pthread.h>
38 #include "pthread_private.h"
39
40 int
kevent(int kq,const struct kevent * changelist,int nchanges,struct kevent * eventlist,int nevents,const struct timespec * timeout)41 kevent(int kq, const struct kevent *changelist, int nchanges,
42 struct kevent *eventlist, int nevents, const struct timespec *timeout)
43 {
44 struct pthread *curthread = _get_curthread();
45 struct timespec nullts = { 0, 0 };
46 int rc;
47
48 /* Set the wake up time */
49 _thread_kern_set_timeout(timeout);
50
51 rc = _thread_sys_kevent(kq, changelist, nchanges,
52 eventlist, nevents, &nullts);
53 if (rc == 0 && eventlist != NULL && nevents > 0 && (timeout == NULL ||
54 timeout->tv_sec != 0 || timeout->tv_nsec != 0)) {
55 /* Save the socket file descriptor: */
56 curthread->data.fd.fd = kq;
57 curthread->data.fd.fname = __FILE__;
58 curthread->data.fd.branch = __LINE__;
59
60 do {
61 /* Reset the interrupted and timeout flags: */
62 curthread->interrupted = 0;
63 curthread->timeout = 0;
64
65 _thread_kern_sched_state(PS_FDR_WAIT,
66 __FILE__, __LINE__);
67
68 if (curthread->interrupted) {
69 errno = EINTR;
70 rc = -1;
71 break;
72 }
73 rc = _thread_sys_kevent(kq, NULL, 0,
74 eventlist, nevents, &nullts);
75 } while (rc == 0 && curthread->timeout == 0);
76 }
77 return (rc);
78 }
79 #endif
80