projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 0a07288b | 1 | /* C11 threads timed mutex tests. |
| 04277e02 | 2 | Copyright (C) 2018-2019 Free Software Foundation, Inc. |
| 0a07288b AZ |
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 | <http://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 | /* Shared mutex between child and parent. */ | |
| 26 | static mtx_t mutex; | |
| 27 | ||
| 28 | /* Shared counter to check possible race conditions. */ | |
| 29 | static char shrd_counter; | |
| 30 | ||
| 31 | /* Maximum amount of time waiting for mutex. */ | |
| 32 | static struct timespec wait_time; | |
| 33 | ||
| 34 | /* Function to choose an action to do, depending on mtx_timedlock | |
| 35 | return value. */ | |
| 36 | static inline void | |
| 37 | choose_action (int action, char* thread_name) | |
| 38 | { | |
| 39 | switch (action) | |
| 40 | { | |
| 41 | case thrd_success: | |
| 42 | ++shrd_counter; | |
| 43 | ||
| 44 | if (mtx_unlock (&mutex) != thrd_success) | |
| 45 | FAIL_EXIT1 ("mtx_unlock failed"); | |
| 46 | break; | |
| 47 | ||
| 48 | case thrd_timedout: | |
| 49 | break; | |
| 50 | ||
| 51 | case thrd_error: | |
| 52 | FAIL_EXIT1 ("%s lock error", thread_name); | |
| 53 | break; | |
| 54 | } | |
| 55 | } | |
| 56 | ||
| 57 | static int | |
| 58 | child_add (void *arg) | |
| 59 | { | |
| 60 | char child_name[] = "child"; | |
| 61 | ||
| 62 | /* Try to lock mutex. */ | |
| 63 | choose_action (mtx_timedlock (&mutex, &wait_time), child_name); | |
| 64 | thrd_exit (thrd_success); | |
| 65 | } | |
| 66 | ||
| 67 | static int | |
| 68 | do_test (void) | |
| 69 | { | |
| 70 | thrd_t id; | |
| 71 | char parent_name[] = "parent"; | |
| 72 | ||
| 73 | if (mtx_init (&mutex, mtx_timed) != thrd_success) | |
| 74 | FAIL_EXIT1 ("mtx_init failed"); | |
| 75 | ||
| 76 | if (clock_gettime (CLOCK_REALTIME, &wait_time) != 0) | |
| 77 | FAIL_EXIT1 ("clock_gettime failed"); | |
| 78 | /* Tiny amount of time, to assure that if any thread finds it busy. | |
| 79 | It will receive thrd_timedout. */ | |
| 80 | wait_time.tv_nsec += 1; | |
| d6b8f847 FW |
81 | if (wait_time.tv_nsec == 1000 * 1000 * 1000) |
| 82 | { | |
| 83 | wait_time.tv_sec += 1; | |
| 84 | wait_time.tv_nsec = 0; | |
| 85 | } | |
| 0a07288b AZ |
86 | |
| 87 | if (thrd_create (&id, child_add, NULL) != thrd_success) | |
| 88 | FAIL_EXIT1 ("thrd_create failed"); | |
| 89 | ||
| 90 | choose_action (mtx_timedlock (&mutex, &wait_time), parent_name); | |
| 91 | ||
| 92 | if (thrd_join (id, NULL) != thrd_success) | |
| 93 | FAIL_EXIT1 ("thrd_join failed"); | |
| 94 | ||
| 95 | if (shrd_counter != 2 && shrd_counter != 1) | |
| 96 | FAIL_EXIT1 ("shrd_counter != {1,2} (%d)", shrd_counter); | |
| 97 | ||
| 98 | mtx_destroy (&mutex); | |
| 99 | ||
| 100 | return 0; | |
| 101 | } | |
| 102 | ||
| 103 | #include <support/test-driver.c> |