| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2002-2015 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. |
| 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 <error.h> |
| 20 | #include <pthread.h> |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | |
| 24 | |
| 25 | static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; |
| 26 | static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER; |
| 27 | |
| 28 | |
| 29 | static void * |
| 30 | tf (void *p) |
| 31 | { |
| 32 | int err; |
| 33 | |
| 34 | err = pthread_mutex_lock (&mut); |
| 35 | if (err != 0) |
| 36 | error (EXIT_FAILURE, err, "child: cannot get mutex"); |
| 37 | |
| 38 | puts ("child: got mutex; signalling"); |
| 39 | |
| 40 | pthread_cond_signal (&cond); |
| 41 | |
| 42 | puts ("child: unlock"); |
| 43 | |
| 44 | err = pthread_mutex_unlock (&mut); |
| 45 | if (err != 0) |
| 46 | error (EXIT_FAILURE, err, "child: cannot unlock"); |
| 47 | |
| 48 | puts ("child: done"); |
| 49 | |
| 50 | return NULL; |
| 51 | } |
| 52 | |
| 53 | |
| 54 | static int |
| 55 | do_test (void) |
| 56 | { |
| 57 | pthread_t th; |
| 58 | int err; |
| 59 | |
| 60 | printf ("&cond = %p\n&mut = %p\n", &cond, &mut); |
| 61 | |
| 62 | puts ("parent: get mutex"); |
| 63 | |
| 64 | err = pthread_mutex_lock (&mut); |
| 65 | if (err != 0) |
| 66 | error (EXIT_FAILURE, err, "parent: cannot get mutex"); |
| 67 | |
| 68 | puts ("parent: create child"); |
| 69 | |
| 70 | err = pthread_create (&th, NULL, tf, NULL); |
| 71 | if (err != 0) |
| 72 | error (EXIT_FAILURE, err, "parent: cannot create thread"); |
| 73 | |
| 74 | puts ("parent: wait for condition"); |
| 75 | |
| 76 | err = pthread_cond_wait (&cond, &mut); |
| 77 | if (err != 0) |
| 78 | error (EXIT_FAILURE, err, "parent: cannot wait fir signal"); |
| 79 | |
| 80 | puts ("parent: got signal"); |
| 81 | |
| 82 | err = pthread_join (th, NULL); |
| 83 | if (err != 0) |
| 84 | error (EXIT_FAILURE, err, "parent: failed to join"); |
| 85 | |
| 86 | puts ("done"); |
| 87 | |
| 88 | return 0; |
| 89 | } |
| 90 | |
| 91 | |
| 92 | #define TEST_FUNCTION do_test () |
| 93 | #include "../test-skeleton.c" |