File: ABCDBDDA.c

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// SPDX-License-Identifier: GPL-2.0
#include <liblockdep/mutex.h>
#include "common.h"

void main(void)
{
	pthread_mutex_t a, b, c, d;

	pthread_mutex_init(&a, NULL);
	pthread_mutex_init(&b, NULL);
	pthread_mutex_init(&c, NULL);
	pthread_mutex_init(&d, NULL);

	LOCK_UNLOCK_2(a, b);
	LOCK_UNLOCK_2(c, d);
	LOCK_UNLOCK_2(b, d);
	LOCK_UNLOCK_2(d, a);

	pthread_mutex_destroy(&d);
	pthread_mutex_destroy(&c);
	pthread_mutex_destroy(&b);
	pthread_mutex_destroy(&a);
}