1 /* 2 * Copyright (C) 2015 Cyril Hrubis <chrubis (at) suse.cz> 3 * 4 * Licensed under the GNU GPLv2 or later. 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 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 /* 20 * 1. Block on a futex and wait for timeout. 21 * 2. Check that the futex waited for expected time. 22 */ 23 24 #include <errno.h> 25 26 #include "test.h" 27 #include "futextest.h" 28 29 #define TRESHOLD_US 100000 30 31 const char *TCID="futex_wait05"; 32 const int TST_TOTAL=1; 33 34 static void verify_futex_wait(clock_t clk_id, int fflags) 35 { 36 struct timespec to = {.tv_sec = 0, .tv_nsec = 100010000}; 37 futex_t futex = FUTEX_INITIALIZER; 38 39 tst_timer_start(clk_id); 40 TEST(futex_wait(&futex, futex, &to, fflags)); 41 tst_timer_stop(); 42 43 if (TEST_RETURN != -1) { 44 tst_resm(TFAIL, "futex_wait() returned %li, expected -1", 45 TEST_RETURN); 46 return; 47 } 48 49 if (TEST_ERRNO != ETIMEDOUT) { 50 51 tst_resm(TFAIL | TTERRNO, "expected errno=%s", 52 tst_strerrno(ETIMEDOUT)); 53 return; 54 } 55 56 if (tst_timespec_lt(tst_timer_elapsed(), to)) { 57 tst_resm(TFAIL, 58 "futex_wait() woken up prematurely %llius, expected %llius", 59 tst_timer_elapsed_us(), tst_timespec_to_us(to)); 60 return; 61 } 62 63 if (tst_timespec_diff_us(tst_timer_elapsed(), to) > TRESHOLD_US) { 64 tst_resm(TFAIL, 65 "futex_wait() waited too long %llius, expected %llius", 66 tst_timer_elapsed_us(), tst_timespec_to_us(to)); 67 return; 68 } 69 70 tst_resm(TPASS, "futex_wait() waited %llius, expected %llius", 71 tst_timer_elapsed_us(), tst_timespec_to_us(to)); 72 } 73 74 int main(int argc, char *argv[]) 75 { 76 int lc; 77 78 tst_timer_check(CLOCK_MONOTONIC); 79 80 tst_parse_opts(argc, argv, NULL, NULL); 81 82 for (lc = 0; TEST_LOOPING(lc); lc++) 83 verify_futex_wait(CLOCK_MONOTONIC, 0); 84 85 tst_exit(); 86 } 87
