xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | /* This tests the barrier reset mechanism. |
| 2 | Copyright (C) 2004-2015 Free Software Foundation, Inc. |
| 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 <errno.h> |
| 20 | #include <pthread.h> |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <internaltypes.h> |
| 24 | |
| 25 | |
| 26 | static pthread_barrier_t b1; |
| 27 | static pthread_barrier_t b2; |
| 28 | |
| 29 | |
| 30 | #define N 20 |
| 31 | #define ROUNDS_PER_RUN 20 |
| 32 | #define START ((BARRIER_IN_THRESHOLD / N - ROUNDS_PER_RUN / 2) * N) |
| 33 | |
| 34 | static void * |
| 35 | tf (void *arg) |
| 36 | { |
| 37 | int runs = 0; |
| 38 | |
| 39 | while (runs++ < 30) |
| 40 | { |
| 41 | /* In each run, we execute a number of rounds and initialize the barrier |
| 42 | so that we will go over the reset threshold with those rounds. */ |
| 43 | for (int rounds = 0; rounds < ROUNDS_PER_RUN; rounds++) |
| 44 | pthread_barrier_wait (&b1); |
| 45 | |
| 46 | if (pthread_barrier_wait (&b1) == PTHREAD_BARRIER_SERIAL_THREAD) |
| 47 | { |
| 48 | pthread_barrier_destroy (&b1); |
| 49 | if (pthread_barrier_init (&b1, NULL, N) != 0) |
| 50 | { |
| 51 | puts ("tf: 1st barrier_init failed"); |
| 52 | exit (1); |
| 53 | } |
| 54 | puts ("b1 reinitialized"); |
| 55 | /* Trigger a reset. */ |
| 56 | struct pthread_barrier *bar = (struct pthread_barrier *) &b1; |
| 57 | bar->in = START; |
| 58 | bar->out = START; |
| 59 | /* We deliberately don't set bar->current_round so that we also |
| 60 | test whether the helping for the updates of current_round |
| 61 | works correctly. */ |
| 62 | } |
| 63 | |
| 64 | /* Same as above, just for b2. */ |
| 65 | for (int rounds = 0; rounds < ROUNDS_PER_RUN; rounds++) |
| 66 | pthread_barrier_wait (&b2); |
| 67 | |
| 68 | if (pthread_barrier_wait (&b2) == PTHREAD_BARRIER_SERIAL_THREAD) |
| 69 | { |
| 70 | pthread_barrier_destroy (&b2); |
| 71 | if (pthread_barrier_init (&b2, NULL, N) != 0) |
| 72 | { |
| 73 | puts ("tf: 2nd barrier_init failed"); |
| 74 | exit (1); |
| 75 | } |
| 76 | puts ("b2 reinitialized"); |
| 77 | /* Trigger a reset. See above. */ |
| 78 | struct pthread_barrier *bar = (struct pthread_barrier *) &b2; |
| 79 | bar->in = START; |
| 80 | bar->out = START; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | return NULL; |
| 85 | } |
| 86 | |
| 87 | |
| 88 | static int |
| 89 | do_test (void) |
| 90 | { |
| 91 | pthread_attr_t at; |
| 92 | int cnt; |
| 93 | |
| 94 | if (pthread_attr_init (&at) != 0) |
| 95 | { |
| 96 | puts ("attr_init failed"); |
| 97 | return 1; |
| 98 | } |
| 99 | |
| 100 | if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0) |
| 101 | { |
| 102 | puts ("attr_setstacksize failed"); |
| 103 | return 1; |
| 104 | } |
| 105 | |
| 106 | if (pthread_barrier_init (&b1, NULL, N) != 0) |
| 107 | { |
| 108 | puts ("1st barrier_init failed"); |
| 109 | return 1; |
| 110 | } |
| 111 | |
| 112 | if (pthread_barrier_init (&b2, NULL, N) != 0) |
| 113 | { |
| 114 | puts ("2nd barrier_init failed"); |
| 115 | return 1; |
| 116 | } |
| 117 | |
| 118 | pthread_t th[N - 1]; |
| 119 | for (cnt = 0; cnt < N - 1; ++cnt) |
| 120 | if (pthread_create (&th[cnt], &at, tf, NULL) != 0) |
| 121 | { |
| 122 | puts ("pthread_create failed"); |
| 123 | return 1; |
| 124 | } |
| 125 | |
| 126 | if (pthread_attr_destroy (&at) != 0) |
| 127 | { |
| 128 | puts ("attr_destroy failed"); |
| 129 | return 1; |
| 130 | } |
| 131 | |
| 132 | tf (NULL); |
| 133 | |
| 134 | for (cnt = 0; cnt < N - 1; ++cnt) |
| 135 | if (pthread_join (th[cnt], NULL) != 0) |
| 136 | { |
| 137 | puts ("pthread_join failed"); |
| 138 | return 1; |
| 139 | } |
| 140 | |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | #define TEST_FUNCTION do_test () |
| 145 | #include "../test-skeleton.c" |