3703f13333
Suggested by Diego Biurrun and James Almer. Signed-off-by: Wan-Teh Chang <wtc@google.com> Signed-off-by: James Almer <jamrial@gmail.com>
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* This test program tests whether the one-time initialization in
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* av_get_cpu_flags() has data races.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "libavutil/cpu.h"
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#include "libavutil/thread.h"
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static void *thread_main(void *arg)
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{
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int *flags = arg;
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*flags = av_get_cpu_flags();
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return NULL;
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}
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int main(void)
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{
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int cpu_flags1;
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int cpu_flags2;
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int ret;
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pthread_t thread1;
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pthread_t thread2;
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if ((ret = pthread_create(&thread1, NULL, thread_main, &cpu_flags1))) {
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fprintf(stderr, "pthread_create failed: %s.\n", strerror(ret));
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return 1;
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}
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if ((ret = pthread_create(&thread2, NULL, thread_main, &cpu_flags2))) {
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fprintf(stderr, "pthread_create failed: %s.\n", strerror(ret));
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return 1;
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}
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pthread_join(thread1, NULL);
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pthread_join(thread2, NULL);
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if (cpu_flags1 < 0)
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return 2;
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if (cpu_flags2 < 0)
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return 2;
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if (cpu_flags1 != cpu_flags2)
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return 3;
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return 0;
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}
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