ffmpeg/libavutil/tests/atomic.c

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/*
* 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
*/
#include "libavutil/atomic.h"
#include "libavutil/avassert.h"
int main(void)
{
volatile int val = 1;
void *tmp1 = (int *)&val;
void * volatile *tmp2 = &tmp1;
int res;
res = avpriv_atomic_int_add_and_fetch(&val, 1);
av_assert0(res == 2);
avpriv_atomic_int_set(&val, 3);
res = avpriv_atomic_int_get(&val);
av_assert0(res == 3);
avpriv_atomic_ptr_cas(tmp2, tmp1, &res);
av_assert0(*tmp2 == &res);
return 0;
}