#ifdef _TM
#define LOCK __transaction_atomic {
#define UNLOCK }
#endif

#ifdef _LOCK
#include <pthread.h>
static pthread_mutex_t l = PTHREAD_MUTEX_INITIALIZER;
#define LOCK pthread_mutex_lock (&l);
#define UNLOCK pthread_mutex_unlock (&l);
#endif

int main (int argc, char **argv)
{
	int a = 0, b = 1, c = 2;

	LOCK
	if (a < b)
		c++;
	UNLOCK

	return 0;
}