1 /******************************************************************************
2 *
3 * Copyright © International Business Machines Corp., 2009
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 * DESCRIPTION
11 * Block on a futex and wait for timeout.
12 *
13 * AUTHOR
14 * Darren Hart <dvhart@linux.intel.com>
15 *
16 * HISTORY
17 * 2009-Nov-6: Initial version by Darren Hart <dvhart@linux.intel.com>
18 *
19 *****************************************************************************/
20
21 #include <errno.h>
22 #include <getopt.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <time.h>
27 #include "futextest.h"
28 #include "logging.h"
29
30 static long timeout_ns = 100000; /* 100us default timeout */
31
usage(char * prog)32 void usage(char *prog)
33 {
34 printf("Usage: %s\n", prog);
35 printf(" -c Use color\n");
36 printf(" -h Display this help message\n");
37 printf(" -t N Timeout in nanoseconds (default: 100,000)\n");
38 printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
39 VQUIET, VCRITICAL, VINFO);
40 }
41
main(int argc,char * argv[])42 int main(int argc, char *argv[])
43 {
44 futex_t f1 = FUTEX_INITIALIZER;
45 struct timespec to;
46 int res, ret = RET_PASS;
47 int c;
48
49 while ((c = getopt(argc, argv, "cht:v:")) != -1) {
50 switch (c) {
51 case 'c':
52 log_color(1);
53 break;
54 case 'h':
55 usage(basename(argv[0]));
56 exit(0);
57 case 't':
58 timeout_ns = atoi(optarg);
59 break;
60 case 'v':
61 log_verbosity(atoi(optarg));
62 break;
63 default:
64 usage(basename(argv[0]));
65 exit(1);
66 }
67 }
68
69 printf("%s: Block on a futex and wait for timeout\n",
70 basename(argv[0]));
71 printf("\tArguments: timeout=%ldns\n", timeout_ns);
72
73 /* initialize timeout */
74 to.tv_sec = 0;
75 to.tv_nsec = timeout_ns;
76
77 info("Calling futex_wait on f1: %u @ %p\n", f1, &f1);
78 res = futex_wait(&f1, f1, &to, FUTEX_PRIVATE_FLAG);
79 if (!res || errno != ETIMEDOUT) {
80 fail("futex_wait returned %d\n", ret < 0 ? errno : ret);
81 ret = RET_FAIL;
82 }
83
84 print_result(ret);
85 return ret;
86 }
87