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 *      Test if FUTEX_WAIT op returns -EWOULDBLOCK if the futex value differs
12 *      from the expected one.
13 *
14 * AUTHOR
15 *      Gowrishankar <gowrishankar.m@in.ibm.com>
16 *
17 * HISTORY
18 *      2009-Nov-14: Initial version by Gowrishankar <gowrishankar.m@in.ibm.com>
19 *
20 *****************************************************************************/
21
22#include <errno.h>
23#include <getopt.h>
24#include <stdio.h>
25#include <stdlib.h>
26#include <string.h>
27#include <time.h>
28#include "futextest.h"
29#include "logging.h"
30
31#define timeout_ns 100000
32
33void usage(char *prog)
34{
35	printf("Usage: %s\n", prog);
36	printf("  -c	Use color\n");
37	printf("  -h	Display this help message\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	struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};
45	futex_t f1 = FUTEX_INITIALIZER;
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 'v':
58			log_verbosity(atoi(optarg));
59			break;
60		default:
61			usage(basename(argv[0]));
62			exit(1);
63		}
64	}
65
66	printf("%s: Test the unexpected futex value in FUTEX_WAIT\n",
67	       basename(argv[0]));
68
69	info("Calling futex_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
70	res = futex_wait(&f1, f1+1, &to, FUTEX_PRIVATE_FLAG);
71	if (!res || errno != EWOULDBLOCK) {
72		fail("futex_wait returned: %d %s\n",
73		     res ? errno : res, res ? strerror(errno) : "");
74		ret = RET_FAIL;
75	}
76
77	print_result(ret);
78	return ret;
79}
80