1 /* C11 threads recursive mutex tests. 2 Copyright (C) 2018-2021 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library 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 the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #include <threads.h> 20 #include <stdio.h> 21 #include <unistd.h> 22 23 #include <support/check.h> 24 25 static int do_test(void)26do_test (void) 27 { 28 static mtx_t mutex; 29 30 if (mtx_init (&mutex, mtx_plain | mtx_recursive) != thrd_success) 31 FAIL_EXIT1 ("mtx_init failed"); 32 33 if (mtx_lock (&mutex) != thrd_success) 34 FAIL_EXIT1 ("mtx_lock failed"); 35 36 /* Lock mutex second time, if not recursive should deadlock. */ 37 if (mtx_lock (&mutex) != thrd_success) 38 FAIL_EXIT1 ("mtx_lock failed"); 39 40 mtx_destroy (&mutex); 41 42 return 0; 43 } 44 45 #include <support/test-driver.c> 46