| 1 | /* Helper program for testing the pthread_rwlock_t pretty printer. |
|---|---|
| 2 | |
| 3 | Copyright (C) 2016-2022 Free Software Foundation, Inc. |
| 4 | This file is part of the GNU C Library. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <https://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | /* Keep the calls to the pthread_* functions on separate lines to make it easy |
| 21 | to advance through the program using the gdb 'next' command. */ |
| 22 | |
| 23 | #include <pthread.h> |
| 24 | |
| 25 | #define PASS 0 |
| 26 | #define FAIL 1 |
| 27 | |
| 28 | static int test_locking_reader (pthread_rwlock_t *rwlock); |
| 29 | static int test_locking_writer (pthread_rwlock_t *rwlock); |
| 30 | |
| 31 | int |
| 32 | main (void) |
| 33 | { |
| 34 | pthread_rwlock_t rwlock; |
| 35 | |
| 36 | int result = FAIL; |
| 37 | |
| 38 | if (test_locking_reader (rwlock: &rwlock) == PASS |
| 39 | && test_locking_writer (rwlock: &rwlock) == PASS) |
| 40 | result = PASS; |
| 41 | /* Else, one of the pthread_rwlock* functions failed. */ |
| 42 | |
| 43 | return result; |
| 44 | } |
| 45 | |
| 46 | /* Tests locking the rwlock multiple times as a reader. */ |
| 47 | static int |
| 48 | test_locking_reader (pthread_rwlock_t *rwlock) |
| 49 | { |
| 50 | int result = FAIL; |
| 51 | |
| 52 | if (pthread_rwlock_init (rwlock: rwlock, NULL) == 0 |
| 53 | && pthread_rwlock_rdlock (rwlock: rwlock) == 0 /* Test locking (reader). */ |
| 54 | && pthread_rwlock_rdlock (rwlock: rwlock) == 0 |
| 55 | && pthread_rwlock_rdlock (rwlock: rwlock) == 0 |
| 56 | && pthread_rwlock_unlock (rwlock: rwlock) == 0 |
| 57 | && pthread_rwlock_unlock (rwlock: rwlock) == 0 |
| 58 | && pthread_rwlock_unlock (rwlock: rwlock) == 0 |
| 59 | && pthread_rwlock_destroy (rwlock: rwlock) == 0) |
| 60 | result = PASS; |
| 61 | |
| 62 | return result; |
| 63 | } |
| 64 | |
| 65 | /* Tests locking the rwlock as a writer. */ |
| 66 | static int |
| 67 | test_locking_writer (pthread_rwlock_t *rwlock) |
| 68 | { |
| 69 | int result = FAIL; |
| 70 | |
| 71 | if (pthread_rwlock_init (rwlock: rwlock, NULL) == 0 |
| 72 | && pthread_rwlock_wrlock (rwlock: rwlock) == 0 /* Test locking (writer). */ |
| 73 | && pthread_rwlock_unlock (rwlock: rwlock) == 0 |
| 74 | && pthread_rwlock_destroy (rwlock: rwlock) == 0) |
| 75 | result = PASS; |
| 76 | |
| 77 | return result; |
| 78 | } |
| 79 |