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 } 87