1. 根目录:
2. tools
3. lib
4. lockdep
5. tests
6. WW.c

#include <liblockdep/rwlock.h>

void main(void)
{
	pthread_rwlock_t a, b;

	pthread_rwlock_init(&a, NULL);
	pthread_rwlock_init(&b, NULL);

	pthread_rwlock_wrlock(&a);
	pthread_rwlock_rdlock(&b);
	pthread_rwlock_wrlock(&a);
}