1// SPDX-License-Identifier: GPL-2.0-or-later
 2/******************************************************************************
 3 *
 4 *   Copyright © International Business Machines  Corp., 2009
 5 *
 6 * DESCRIPTION
 7 *      Block on a futex and wait for timeout.
 8 *
 9 * AUTHOR
10 *      Darren Hart <dvhart@linux.intel.com>
11 *
12 * HISTORY
13 *      2009-Nov-6: Initial version by Darren Hart <dvhart@linux.intel.com>
14 *
15 *****************************************************************************/
16
17#include <errno.h>
18#include <getopt.h>
19#include <stdio.h>
20#include <stdlib.h>
21#include <string.h>
22#include <time.h>
23#include "futextest.h"
24#include "logging.h"
25
26#define TEST_NAME "futex-wait-timeout"
27
28static long timeout_ns = 100000;	/* 100us default timeout */
29
30void usage(char *prog)
31{
32	printf("Usage: %s\n", prog);
33	printf("  -c	Use color\n");
34	printf("  -h	Display this help message\n");
35	printf("  -t N	Timeout in nanoseconds (default: 100,000)\n");
36	printf("  -v L	Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
37	       VQUIET, VCRITICAL, VINFO);
38}
39
40int main(int argc, char *argv[])
41{
42	futex_t f1 = FUTEX_INITIALIZER;
43	struct timespec to;
44	int res, ret = RET_PASS;
45	int c;
46
47	while ((c = getopt(argc, argv, "cht:v:")) != -1) {
48		switch (c) {
49		case 'c':
50			log_color(1);
51			break;
52		case 'h':
53			usage(basename(argv[0]));
54			exit(0);
55		case 't':
56			timeout_ns = atoi(optarg);
57			break;
58		case 'v':
59			log_verbosity(atoi(optarg));
60			break;
61		default:
62			usage(basename(argv[0]));
63			exit(1);
64		}
65	}
66
67	ksft_print_header();
68	ksft_set_plan(1);
69	ksft_print_msg("%s: Block on a futex and wait for timeout\n",
70	       basename(argv[0]));
71	ksft_print_msg("\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(TEST_NAME, ret);
85	return ret;
86}