diff options
author | Wan-Teh Chang <wtc-at-google.com@ffmpeg.org> | 2016-11-23 22:21:56 +0300 |
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committer | Michael Niedermayer <michael@niedermayer.cc> | 2016-11-24 00:35:25 +0300 |
commit | d84a21207ea83055dc9b6dc1cd6a379f2ea756e7 (patch) | |
tree | bbec23e6deb823193dfc0ea43d19ce7027b6cc93 /libavutil/tests | |
parent | 29fb49194bedc74ac9be0b49b6b42dcfeb6222d9 (diff) |
avutil/tests: Add cpu_init.c to check whether the one-time initialization in av_get_cpu_flags() has data races.
Co-author: Dmitry Vyukov of Google
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavutil/tests')
-rw-r--r-- | libavutil/tests/cpu_init.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/libavutil/tests/cpu_init.c b/libavutil/tests/cpu_init.c new file mode 100644 index 0000000000..5a5ecda3a9 --- /dev/null +++ b/libavutil/tests/cpu_init.c @@ -0,0 +1,72 @@ +/* + * 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 "config.h" + +#include "libavutil/cpu.h" +#include "libavutil/thread.h" + +#if HAVE_PTHREADS +static void *thread_main(void *arg) +{ + int *flags = arg; + + *flags = av_get_cpu_flags(); + return NULL; +} +#endif + + +int main(int argc, char **argv) +{ +#if HAVE_PTHREADS + 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; +#endif + + return 0; +} |