1 /******************************************************************************
3 * Copyright © International Business Machines Corp., 2009
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.
11 * Test if FUTEX_WAIT op returns -EWOULDBLOCK if the futex value differs
12 * from the expected one.
15 * Gowrishankar <gowrishankar.m@in.ibm.com>
18 * 2009-Nov-14: Initial version by Gowrishankar <gowrishankar.m@in.ibm.com>
20 *****************************************************************************/
28 #include "futextest.h"
31 #define TEST_NAME "futex-wait-wouldblock"
32 #define timeout_ns 100000
34 void usage(char *prog)
36 printf("Usage: %s\n", prog);
37 printf(" -c Use color\n");
38 printf(" -h Display this help message\n");
39 printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
40 VQUIET, VCRITICAL, VINFO);
43 int main(int argc, char *argv[])
45 struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};
46 futex_t f1 = FUTEX_INITIALIZER;
47 int res, ret = RET_PASS;
50 while ((c = getopt(argc, argv, "cht:v:")) != -1) {
56 usage(basename(argv[0]));
59 log_verbosity(atoi(optarg));
62 usage(basename(argv[0]));
68 ksft_print_msg("%s: Test the unexpected futex value in FUTEX_WAIT\n",
71 info("Calling futex_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
72 res = futex_wait(&f1, f1+1, &to, FUTEX_PRIVATE_FLAG);
73 if (!res || errno != EWOULDBLOCK) {
74 fail("futex_wait returned: %d %s\n",
75 res ? errno : res, res ? strerror(errno) : "");
79 print_result(TEST_NAME, ret);