1 /******************************************************************************/
2 /* */
3 /* Copyright (c) 2009 FUJITSU LIMITED */
4 /* */
5 /* This program is free software; you can redistribute it and/or modify */
6 /* it under the terms of the GNU General Public License as published by */
7 /* the Free Software Foundation; either version 2 of the License, or */
8 /* (at your option) any later version. */
9 /* */
10 /* This program is distributed in the hope that it will be useful, */
11 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
12 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
13 /* the GNU General Public License for more details. */
14 /* */
15 /* You should have received a copy of the GNU General Public License */
16 /* along with this program; if not, write to the Free Software */
17 /* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
18 /* */
19 /* Author: Miao Xie <miaox@cn.fujitsu.com> */
20 /* Restructure for LTP: Shi Weihua <shiwh@cn.fujitsu.com> */
21 /* */
22 /******************************************************************************/
23
24 #include <stdio.h>
25 #include <math.h>
26 #include <err.h>
27 #include <errno.h>
28 #include <signal.h>
29
30 #define __USE_GNU
31 #include <sched.h>
32
33 #define UNUSED __attribute__ ((unused))
34
35 unsigned long count;
36 volatile int start = 0;
37 volatile double f = 2744545.34456455;
38
sighandler(UNUSED int signo)39 void sighandler(UNUSED int signo)
40 {
41 start = !start;
42 }
43
main(void)44 int main(void)
45 {
46 sigset_t signalset;
47 struct sigaction sa;
48
49 sa.sa_handler = sighandler;
50 if (sigemptyset(&sa.sa_mask) < 0)
51 err(1, "sigemptyset()");
52
53 sa.sa_flags = 0;
54 if (sigaction(SIGUSR1, &sa, NULL) < 0)
55 err(1, "sigaction()");
56
57 if (sigemptyset(&signalset) < 0)
58 err(1, "sigemptyset()");
59
60 sigsuspend(&signalset);
61 if (errno != EINTR)
62 err(1, "sigsuspend()");
63
64 while (start) {
65 f = sqrt(f * f);
66 }
67
68 return 0;
69 }
70