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 #define TEST_NAME "futex-wait-timeout"
31
32 static long timeout_ns = 100000; /* 100us default timeout */
33
usage(char * prog)34 void usage(char *prog)
35 {
36 printf("Usage: %s\n", prog);
37 printf(" -c Use color\n");
38 printf(" -h Display this help message\n");
39 printf(" -t N Timeout in nanoseconds (default: 100,000)\n");
40 printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
41 VQUIET, VCRITICAL, VINFO);
42 }
43
main(int argc,char * argv[])44 int main(int argc, char *argv[])
45 {
46 futex_t f1 = FUTEX_INITIALIZER;
47 struct timespec to;
48 int res, ret = RET_PASS;
49 int c;
50
51 while ((c = getopt(argc, argv, "cht:v:")) != -1) {
52 switch (c) {
53 case 'c':
54 log_color(1);
55 break;
56 case 'h':
57 usage(basename(argv[0]));
58 exit(0);
59 case 't':
60 timeout_ns = atoi(optarg);
61 break;
62 case 'v':
63 log_verbosity(atoi(optarg));
64 break;
65 default:
66 usage(basename(argv[0]));
67 exit(1);
68 }
69 }
70
71 ksft_print_header();
72 ksft_print_msg("%s: Block on a futex and wait for timeout\n",
73 basename(argv[0]));
74 ksft_print_msg("\tArguments: timeout=%ldns\n", timeout_ns);
75
76 /* initialize timeout */
77 to.tv_sec = 0;
78 to.tv_nsec = timeout_ns;
79
80 info("Calling futex_wait on f1: %u @ %p\n", f1, &f1);
81 res = futex_wait(&f1, f1, &to, FUTEX_PRIVATE_FLAG);
82 if (!res || errno != ETIMEDOUT) {
83 fail("futex_wait returned %d\n", ret < 0 ? errno : ret);
84 ret = RET_FAIL;
85 }
86
87 print_result(TEST_NAME, ret);
88 return ret;
89 }
90