// commit: e5dd18319bbd47c89aac5e1571771958a43e067d 2011-03-08

// pthread_rwlock_try* should fail with EBUSY

#include <pthread.h>

#include <errno.h>

#include <string.h>

#include "test.h"

#define T(f) if ((r=(f))) t_error(#f " failed: %s\n", strerror(r))

static void *tryrdlock(void *arg)

{

	int r = pthread_rwlock_tryrdlock(arg);

	if (r != EBUSY)

		t_error("tryrdlock for wrlocked lock returned %s, want EBUSY\n", strerror(r));

	return 0;

}

static void *trywrlock(void *arg)

{

	int r = pthread_rwlock_trywrlock(arg);

	if (r != EBUSY)

		t_error("trywrlock for rdlocked lock returned %s, want EBUSY\n", strerror(r));

	return 0;

}

int main(void)

{

	pthread_t t;

	pthread_rwlock_t rw = PTHREAD_RWLOCK_INITIALIZER;

	void *p;

	int r;

	T(pthread_rwlock_rdlock(&rw));

	T(pthread_create(&t, 0, trywrlock, &rw));

	T(pthread_join(t, &p);;

	T(pthread_rwlock_unlock(&rw));

	T(pthread_rwlock_wrlock(&rw));

	T(pthread_create(&t, 0, tryrdlock, &rw));

	T(pthread_join(t, &p);;

	T(pthread_rwlock_unlock(&rw));

	return t_status;

}