mirror of
https://github.com/openjdk/jdk.git
synced 2026-03-29 09:10:13 +00:00
84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 2022, 2026, Oracle and/or its affiliates. All rights reserved.
|
|
* Copyright (c) 2026, IBM Corp.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code 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 General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
#ifndef TESTLIB_THREAD_BARRIERS_H
|
|
#define TESTLIB_THREAD_BARRIERS_H
|
|
|
|
/* MacOS does not have pthread barriers; implement a fallback using condvars. */
|
|
|
|
#ifndef _WIN32
|
|
#if !defined _POSIX_BARRIERS || _POSIX_BARRIERS < 0
|
|
|
|
#include <pthread.h>
|
|
|
|
#define PTHREAD_BARRIER_SERIAL_THREAD 1
|
|
|
|
#define pthread_barrier_t barr_t
|
|
#define pthread_barrier_init(barr, attr, need) barr_init(barr, attr, need)
|
|
#define pthread_barrier_destroy(barr) barr_destroy(barr)
|
|
#define pthread_barrier_wait(barr) barr_wait(barr)
|
|
|
|
typedef struct {
|
|
pthread_mutex_t mutex;
|
|
pthread_cond_t cond;
|
|
int have, need, trigger_count;
|
|
} barr_t;
|
|
|
|
int barr_init(barr_t* b, void* ignored, int need) {
|
|
b->have = b->trigger_count = 0;
|
|
b->need = need;
|
|
pthread_mutex_init(&b->mutex, NULL);
|
|
pthread_cond_init(&b->cond, NULL);
|
|
return 0;
|
|
}
|
|
|
|
int barr_destroy(barr_t* b) {
|
|
pthread_mutex_destroy(&b->mutex);
|
|
pthread_cond_destroy(&b->cond);
|
|
return 0;
|
|
}
|
|
|
|
int barr_wait(barr_t* b) {
|
|
pthread_mutex_lock(&b->mutex);
|
|
int my_trigger_count = b->trigger_count;
|
|
b->have++;
|
|
if (b->have == b->need) {
|
|
b->have = 0;
|
|
b->trigger_count++;
|
|
pthread_cond_broadcast(&b->cond);
|
|
pthread_mutex_unlock(&b->mutex);
|
|
return PTHREAD_BARRIER_SERIAL_THREAD;
|
|
}
|
|
while (my_trigger_count == b->trigger_count) { // no spurious wakeups
|
|
pthread_cond_wait(&b->cond, &b->mutex);
|
|
}
|
|
pthread_mutex_unlock(&b->mutex);
|
|
return 0;
|
|
}
|
|
|
|
#endif // !_POSIX_BARRIERS
|
|
#endif // !_WIN32
|
|
|
|
#endif // TESTLIB_THREAD_BARRIERS_H
|