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 #define TEST_NAME "futex-wait-timeout" 31 32 static long timeout_ns = 100000; /* 100us default timeout */ 33 34 void usage(char *prog) 35 { 36 printf("Usage: %s\n", prog); 37 printf(" -c Use color\n"); 38 printf(" -h Display this help message\n"); 39 printf(" -t N Timeout in nanoseconds (default: 100,000)\n"); 40 printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n", 41 VQUIET, VCRITICAL, VINFO); 42 } 43 44 int main(int argc, char *argv[]) 45 { 46 futex_t f1 = FUTEX_INITIALIZER; 47 struct timespec to; 48 int res, ret = RET_PASS; 49 int c; 50 51 while ((c = getopt(argc, argv, "cht:v:")) != -1) { 52 switch (c) { 53 case 'c': 54 log_color(1); 55 break; 56 case 'h': 57 usage(basename(argv[0])); 58 exit(0); 59 case 't': 60 timeout_ns = atoi(optarg); 61 break; 62 case 'v': 63 log_verbosity(atoi(optarg)); 64 break; 65 default: 66 usage(basename(argv[0])); 67 exit(1); 68 } 69 } 70 71 ksft_print_header(); 72 ksft_set_plan(1); 73 ksft_print_msg("%s: Block on a futex and wait for timeout\n", 74 basename(argv[0])); 75 ksft_print_msg("\tArguments: timeout=%ldns\n", timeout_ns); 76 77 /* initialize timeout */ 78 to.tv_sec = 0; 79 to.tv_nsec = timeout_ns; 80 81 info("Calling futex_wait on f1: %u @ %p\n", f1, &f1); 82 res = futex_wait(&f1, f1, &to, FUTEX_PRIVATE_FLAG); 83 if (!res || errno != ETIMEDOUT) { 84 fail("futex_wait returned %d\n", ret < 0 ? errno : ret); 85 ret = RET_FAIL; 86 } 87 88 print_result(TEST_NAME, ret); 89 return ret; 90 } 91