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
30static long timeout_ns = 100000;	/* 100us default timeout */
31
32void 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
42int 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