/****************************************************************************** * * Copyright © International Business Machines Corp., 2009 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * DESCRIPTION * Block on a futex and wait for timeout. * * AUTHOR * Darren Hart <dvhart@linux.intel.com> * * HISTORY * 2009-Nov-6: Initial version by Darren Hart <dvhart@linux.intel.com> * *****************************************************************************/ #include <errno.h> #include <getopt.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <time.h> #include "futextest.h" #include "logging.h" #define TEST_NAME "futex-wait-timeout" static long timeout_ns = 100000; /* 100us default timeout */ void usage(char *prog) { printf("Usage: %s\n", prog); printf(" -c Use color\n"); printf(" -h Display this help message\n"); printf(" -t N Timeout in nanoseconds (default: 100,000)\n"); printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n", VQUIET, VCRITICAL, VINFO); } int main(int argc, char *argv[]) { futex_t f1 = FUTEX_INITIALIZER; struct timespec to; int res, ret = RET_PASS; int c; while ((c = getopt(argc, argv, "cht:v:")) != -1) { switch (c) { case 'c': log_color(1); break; case 'h': usage(basename(argv[0])); exit(0); case 't': timeout_ns = atoi(optarg); break; case 'v': log_verbosity(atoi(optarg)); break; default: usage(basename(argv[0])); exit(1); } } ksft_print_header(); ksft_print_msg("%s: Block on a futex and wait for timeout\n", basename(argv[0])); ksft_print_msg("\tArguments: timeout=%ldns\n", timeout_ns); /* initialize timeout */ to.tv_sec = 0; to.tv_nsec = timeout_ns; info("Calling futex_wait on f1: %u @ %p\n", f1, &f1); res = futex_wait(&f1, f1, &to, FUTEX_PRIVATE_FLAG); if (!res || errno != ETIMEDOUT) { fail("futex_wait returned %d\n", ret < 0 ? errno : ret); ret = RET_FAIL; } print_result(TEST_NAME, ret); return ret; }