1 /*
2 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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. Neither the name of the author nor the names of any co-contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: stable/10/lib/libkse/thread/thr_select.c 174689 2007-12-16 23:29:57Z deischen $
30 */
31
32 #include "namespace.h"
33 #include <unistd.h>
34 #include <errno.h>
35 #include <poll.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <sys/param.h>
39 #include <sys/types.h>
40 #include <sys/time.h>
41 #include <sys/fcntl.h>
42 #include <pthread.h>
43 #include "un-namespace.h"
44 #include "thr_private.h"
45
46 int __select(int numfds, fd_set *readfds, fd_set *writefds,
47 fd_set *exceptfds, struct timeval *timeout);
48
49 __weak_reference(__select, select);
50
51 int
__select(int numfds,fd_set * readfds,fd_set * writefds,fd_set * exceptfds,struct timeval * timeout)52 __select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
53 struct timeval *timeout)
54 {
55 struct pthread *curthread = _get_curthread();
56 struct timespec ts;
57 int ret;
58
59 if (numfds == 0 && timeout != NULL) {
60 TIMEVAL_TO_TIMESPEC(timeout, &ts);
61 ret = _nanosleep(&ts, NULL);
62 } else {
63 _thr_cancel_enter(curthread);
64 ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout);
65 _thr_cancel_leave(curthread, 1);
66 }
67 return (ret);
68 }
69