| /* |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * This test program tests whether the one-time initialization in |
| * av_get_cpu_flags() has data races. |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "libavutil/cpu.h" |
| #include "libavutil/thread.h" |
| |
| static void *thread_main(void *arg) |
| { |
| int *flags = arg; |
| |
| *flags = av_get_cpu_flags(); |
| return NULL; |
| } |
| |
| int main(void) |
| { |
| int cpu_flags1; |
| int cpu_flags2; |
| int ret; |
| pthread_t thread1; |
| pthread_t thread2; |
| |
| if ((ret = pthread_create(&thread1, NULL, thread_main, &cpu_flags1))) { |
| fprintf(stderr, "pthread_create failed: %s.\n", strerror(ret)); |
| return 1; |
| } |
| if ((ret = pthread_create(&thread2, NULL, thread_main, &cpu_flags2))) { |
| fprintf(stderr, "pthread_create failed: %s.\n", strerror(ret)); |
| return 1; |
| } |
| pthread_join(thread1, NULL); |
| pthread_join(thread2, NULL); |
| |
| if (cpu_flags1 < 0) |
| return 2; |
| if (cpu_flags2 < 0) |
| return 2; |
| if (cpu_flags1 != cpu_flags2) |
| return 3; |
| |
| return 0; |
| } |