| 1 | /* Test pthread_once. |
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| 2 | Copyright (C) 2000-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #define _GNU_SOURCE |
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| 20 | |
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| 21 | #include <pthread.h> |
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| 22 | #include <assert.h> |
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| 23 | #include <error.h> |
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| 24 | #include <errno.h> |
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| 25 | |
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| 26 | #define THREADS 10 |
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| 27 | |
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| 28 | pthread_once_t inc_var_once = PTHREAD_ONCE_INIT; |
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| 29 | int var; |
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| 30 | |
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| 31 | void |
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| 32 | inc_var (void) |
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| 33 | { |
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| 34 | var++; |
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| 35 | } |
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| 36 | |
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| 37 | void * |
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| 38 | thr (void *arg) |
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| 39 | { |
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| 40 | int i; |
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| 41 | |
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| 42 | for (i = 0; i < 500; i++) |
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| 43 | pthread_once (once_control: &inc_var_once, init_routine: inc_var); |
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| 44 | |
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| 45 | return 0; |
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| 46 | } |
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| 47 | |
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| 48 | int |
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| 49 | main (int argc, char **argv) |
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| 50 | { |
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| 51 | error_t err; |
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| 52 | int i; |
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| 53 | pthread_t tid[THREADS]; |
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| 54 | |
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| 55 | for (i = 0; i < THREADS; i++) |
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| 56 | { |
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| 57 | err = pthread_create (newthread: &tid[i], attr: 0, start_routine: thr, arg: 0); |
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| 58 | if (err) |
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| 59 | error (status: 1, errnum: err, format: "pthread_create (%d)" , i); |
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| 60 | } |
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| 61 | |
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| 62 | assert (thr (0) == 0); |
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| 63 | |
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| 64 | for (i = 0; i < THREADS; i++) |
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| 65 | { |
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| 66 | void *ret; |
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| 67 | |
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| 68 | err = pthread_join (th: tid[i], thread_return: &ret); |
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| 69 | if (err) |
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| 70 | error (status: 1, errnum: err, format: "pthread_join" ); |
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| 71 | |
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| 72 | assert (ret == 0); |
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| 73 | } |
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| 74 | |
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| 75 | assert (var == 1); |
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| 76 | |
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| 77 | return 0; |
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| 78 | } |
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| 79 | |
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