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

DEFINITIONS

1. usage
2. main

   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 
  28 static long timeout_ns = 100000;        /* 100us default timeout */
  29 
  30 void 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 
  40 int 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 }