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 } 87