| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 2002-2016 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 <pthread.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <unistd.h> |
| 24 | |
| 25 | |
| 26 | /* Note that this test requires more than the standard. It is |
| 27 | required that there are no spurious wakeups if only more readers |
| 28 | are added. This is a reasonable demand. */ |
| 29 | |
| 30 | |
| 31 | static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; |
| 32 | static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER; |
| 33 | |
| 34 | |
| 35 | #define N 10 |
| 36 | |
| 37 | |
| 38 | static void * |
| 39 | tf (void *arg) |
| 40 | { |
| 41 | int i = (long int) arg; |
| 42 | int err; |
| 43 | |
| 44 | /* Get the mutex. */ |
| 45 | err = pthread_mutex_lock (&mut); |
| 46 | if (err != 0) |
| 47 | { |
| 48 | printf ("child %d mutex_lock failed: %s\n", i, strerror (err)); |
| 49 | exit (1); |
| 50 | } |
| 51 | |
| 52 | /* This call should never return. */ |
| 53 | pthread_cond_wait (&cond, &mut); |
| 54 | |
| 55 | /* We should never get here. */ |
| 56 | exit (1); |
| 57 | |
| 58 | return NULL; |
| 59 | } |
| 60 | |
| 61 | |
| 62 | static int |
| 63 | do_test (void) |
| 64 | { |
| 65 | int err; |
| 66 | int i; |
| 67 | |
| 68 | for (i = 0; i < N; ++i) |
| 69 | { |
| 70 | pthread_t th; |
| 71 | |
| 72 | if (i != 0) |
| 73 | { |
| 74 | /* Release the mutex. */ |
| 75 | err = pthread_mutex_unlock (&mut); |
| 76 | if (err != 0) |
| 77 | { |
| 78 | printf ("mutex_unlock %d failed: %s\n", i, strerror (err)); |
| 79 | return 1; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | err = pthread_create (&th, NULL, tf, (void *) (long int) i); |
| 84 | if (err != 0) |
| 85 | { |
| 86 | printf ("create %d failed: %s\n", i, strerror (err)); |
| 87 | return 1; |
| 88 | } |
| 89 | |
| 90 | /* Get the mutex. */ |
| 91 | err = pthread_mutex_lock (&mut); |
| 92 | if (err != 0) |
| 93 | { |
| 94 | printf ("mutex_lock %d failed: %s\n", i, strerror (err)); |
| 95 | return 1; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | /* Set an alarm for 1 second. The wrapper will expect this. */ |
| 100 | alarm (1); |
| 101 | |
| 102 | /* This call should never return. */ |
| 103 | pthread_cond_wait (&cond, &mut); |
| 104 | |
| 105 | puts ("cond_wait returned"); |
| 106 | return 1; |
| 107 | } |
| 108 | |
| 109 | |
| 110 | #define EXPECTED_SIGNAL SIGALRM |
| 111 | #define TEST_FUNCTION do_test () |
| 112 | #include "../test-skeleton.c" |