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glibc/nptl/tst-barrier5.c
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/* This tests the barrier reset mechanism. | |
Copyright (C) 2004-2015 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <pthread.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <internaltypes.h> | |
static pthread_barrier_t b1; | |
static pthread_barrier_t b2; | |
#define N 20 | |
#define ROUNDS_PER_RUN 20 | |
#define START ((BARRIER_IN_THRESHOLD / N - ROUNDS_PER_RUN / 2) * N) | |
static void * | |
tf (void *arg) | |
{ | |
int runs = 0; | |
while (runs++ < 30) | |
{ | |
/* In each run, we execute a number of rounds and initialize the barrier | |
so that we will go over the reset threshold with those rounds. */ | |
for (int rounds = 0; rounds < ROUNDS_PER_RUN; rounds++) | |
pthread_barrier_wait (&b1); | |
if (pthread_barrier_wait (&b1) == PTHREAD_BARRIER_SERIAL_THREAD) | |
{ | |
pthread_barrier_destroy (&b1); | |
if (pthread_barrier_init (&b1, NULL, N) != 0) | |
{ | |
puts ("tf: 1st barrier_init failed"); | |
exit (1); | |
} | |
puts ("b1 reinitialized"); | |
/* Trigger a reset. */ | |
struct pthread_barrier *bar = (struct pthread_barrier *) &b1; | |
bar->in = START; | |
bar->out = START; | |
/* We deliberately don't set bar->current_round so that we also | |
test whether the helping for the updates of current_round | |
works correctly. */ | |
} | |
/* Same as above, just for b2. */ | |
for (int rounds = 0; rounds < ROUNDS_PER_RUN; rounds++) | |
pthread_barrier_wait (&b2); | |
if (pthread_barrier_wait (&b2) == PTHREAD_BARRIER_SERIAL_THREAD) | |
{ | |
pthread_barrier_destroy (&b2); | |
if (pthread_barrier_init (&b2, NULL, N) != 0) | |
{ | |
puts ("tf: 2nd barrier_init failed"); | |
exit (1); | |
} | |
puts ("b2 reinitialized"); | |
/* Trigger a reset. See above. */ | |
struct pthread_barrier *bar = (struct pthread_barrier *) &b2; | |
bar->in = START; | |
bar->out = START; | |
} | |
} | |
return NULL; | |
} | |
static int | |
do_test (void) | |
{ | |
pthread_attr_t at; | |
int cnt; | |
if (pthread_attr_init (&at) != 0) | |
{ | |
puts ("attr_init failed"); | |
return 1; | |
} | |
if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0) | |
{ | |
puts ("attr_setstacksize failed"); | |
return 1; | |
} | |
if (pthread_barrier_init (&b1, NULL, N) != 0) | |
{ | |
puts ("1st barrier_init failed"); | |
return 1; | |
} | |
if (pthread_barrier_init (&b2, NULL, N) != 0) | |
{ | |
puts ("2nd barrier_init failed"); | |
return 1; | |
} | |
pthread_t th[N - 1]; | |
for (cnt = 0; cnt < N - 1; ++cnt) | |
if (pthread_create (&th[cnt], &at, tf, NULL) != 0) | |
{ | |
puts ("pthread_create failed"); | |
return 1; | |
} | |
if (pthread_attr_destroy (&at) != 0) | |
{ | |
puts ("attr_destroy failed"); | |
return 1; | |
} | |
tf (NULL); | |
for (cnt = 0; cnt < N - 1; ++cnt) | |
if (pthread_join (th[cnt], NULL) != 0) | |
{ | |
puts ("pthread_join failed"); | |
return 1; | |
} | |
return 0; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |