tools/testing/selftests/futex/functional/futex_wait_timeout.c

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