1#include <liblockdep/rwlock.h>
 2
 3void main(void)
 4{
 5	pthread_rwlock_t a, b;
 6
 7	pthread_rwlock_init(&a, NULL);
 8	pthread_rwlock_init(&b, NULL);
 9
10	pthread_rwlock_wrlock(&a);
11	pthread_rwlock_rdlock(&b);
12	pthread_rwlock_wrlock(&a);
13}