mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
/* Test support for single-thread optimizations. With threads, static version.
|
|
Copyright (C) 2020-2024 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* This test is a stripped-down version of
|
|
tst-single_threaded-pthread.c, without any loading of dynamic
|
|
objects. */
|
|
|
|
#include <stdio.h>
|
|
#include <support/check.h>
|
|
#include <support/xthread.h>
|
|
#include <sys/single_threaded.h>
|
|
|
|
/* First barrier synchronizes main thread, thread 1, thread 2. */
|
|
static pthread_barrier_t barrier1;
|
|
|
|
/* Second barrier synchronizes main thread, thread 2. */
|
|
static pthread_barrier_t barrier2;
|
|
|
|
static void *
|
|
threadfunc (void *closure)
|
|
{
|
|
TEST_VERIFY (!__libc_single_threaded);
|
|
|
|
/* Wait for the main thread and the other thread. */
|
|
xpthread_barrier_wait (&barrier1);
|
|
TEST_VERIFY (!__libc_single_threaded);
|
|
|
|
/* Second thread waits on second barrier, too. */
|
|
if (closure != NULL)
|
|
xpthread_barrier_wait (&barrier2);
|
|
TEST_VERIFY (!__libc_single_threaded);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
TEST_VERIFY (__libc_single_threaded);
|
|
|
|
/* Two threads plus main thread. */
|
|
xpthread_barrier_init (&barrier1, NULL, 3);
|
|
|
|
/* Main thread and second thread. */
|
|
xpthread_barrier_init (&barrier2, NULL, 2);
|
|
|
|
pthread_t thr1 = xpthread_create (NULL, threadfunc, NULL);
|
|
TEST_VERIFY (!__libc_single_threaded);
|
|
|
|
pthread_t thr2 = xpthread_create (NULL, threadfunc, &thr2);
|
|
TEST_VERIFY (!__libc_single_threaded);
|
|
|
|
xpthread_barrier_wait (&barrier1);
|
|
TEST_VERIFY (!__libc_single_threaded);
|
|
|
|
/* Join first thread. This should not bring us back into
|
|
single-threaded mode. */
|
|
xpthread_join (thr1);
|
|
TEST_VERIFY (!__libc_single_threaded);
|
|
|
|
/* We may be back in single-threaded mode after joining both
|
|
threads, but this is not guaranteed. */
|
|
xpthread_barrier_wait (&barrier2);
|
|
xpthread_join (thr2);
|
|
printf ("info: __libc_single_threaded after joining all threads: %d\n",
|
|
__libc_single_threaded);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|