1 /*
2 * Copyright (C) 2008 The Android Open Source Project
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 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28 #include <sys/select.h>
29 #include <signal.h>
30 #include <pthread.h>
31
32 int
pselect(int n,fd_set * readfds,fd_set * writefds,fd_set * errfds,const struct timespec * timeout,const sigset_t * sigmask)33 pselect(int n, fd_set* readfds, fd_set* writefds, fd_set* errfds,
34 const struct timespec* timeout, const sigset_t* sigmask)
35 {
36 sigset_t oldmask;
37 int result;
38 struct timeval tv, *tv_timeout = NULL;
39
40 if (sigmask != NULL)
41 pthread_sigmask( SIG_SETMASK, sigmask, &oldmask );
42
43 if (timeout != NULL) {
44 tv_timeout = &tv;
45 tv.tv_sec = timeout->tv_sec;
46 tv.tv_usec = (timeout->tv_nsec + 999)/1000; // round up
47 if (tv.tv_usec >= 1000000) {
48 tv.tv_sec += 1;
49 tv.tv_usec -= 1000000;
50 }
51 }
52
53 result = select( n, readfds, writefds, errfds, tv_timeout );
54
55 if (sigmask != NULL)
56 pthread_sigmask( SIG_SETMASK, &oldmask, NULL );
57
58 return result;
59 }
60