2 * Copyright (c) 1999 Daniel Eischen <eischen@vigrid.com>
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, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Daniel Eischen.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * $FreeBSD: src/lib/libc_r/uthread/uthread_poll.c,v 1.9.2.4 2002/10/22 14:44:03 fjoe Exp $
33 * $DragonFly: src/lib/libc_r/uthread/uthread_poll.c,v 1.2 2003/06/17 04:26:48 dillon Exp $
39 #include <sys/types.h>
41 #include <sys/fcntl.h>
43 #include "pthread_private.h"
47 _poll(struct pollfd *fds, unsigned int nfds, int timeout)
49 struct pthread *curthread = _get_curthread();
53 struct pthread_poll_data data;
55 if (numfds > _thread_dtablesize) {
56 numfds = _thread_dtablesize;
58 /* Check if a timeout was specified: */
59 if (timeout == INFTIM) {
61 _thread_kern_set_timeout(NULL);
62 } else if (timeout > 0) {
63 /* Convert the timeout in msec to a timespec: */
64 ts.tv_sec = timeout / 1000;
65 ts.tv_nsec = (timeout % 1000) * 1000000;
67 /* Set the wake up time: */
68 _thread_kern_set_timeout(&ts);
69 } else if (timeout < 0) {
70 /* a timeout less than zero but not == INFTIM is invalid */
75 if (((ret = __sys_poll(fds, numfds, 0)) == 0) && (timeout != 0)) {
80 * Clear revents in case of a timeout which leaves fds
83 for (i = 0; i < numfds; i++) {
87 curthread->data.poll_data = &data;
88 curthread->interrupted = 0;
89 _thread_kern_sched_state(PS_POLL_WAIT, __FILE__, __LINE__);
90 if (curthread->interrupted) {
102 poll(struct pollfd *fds, unsigned int nfds, int timeout)
106 _thread_enter_cancellation_point();
107 ret = _poll(fds, nfds, timeout);
108 _thread_leave_cancellation_point();