2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 * This test program tests whether the one-time initialization in
21 * av_get_cpu_flags() has data races.
27 #include "libavutil/cpu.h"
28 #include "libavutil/thread.h"
30 static void *thread_main(void *arg)
34 *flags = av_get_cpu_flags();
46 if ((ret = pthread_create(&thread1, NULL, thread_main, &cpu_flags1))) {
47 fprintf(stderr, "pthread_create failed: %s.\n", strerror(ret));
50 if ((ret = pthread_create(&thread2, NULL, thread_main, &cpu_flags2))) {
51 fprintf(stderr, "pthread_create failed: %s.\n", strerror(ret));
54 pthread_join(thread1, NULL);
55 pthread_join(thread2, NULL);
61 if (cpu_flags1 != cpu_flags2)