#include <boost/date_time/posix_time/posix_time.hpp>
using namespace boost::posix_time;
#include <boost/interprocess/sync/named_semaphore.hpp>
using namespace boost::interprocess;
#include <iostream>
using namespace std;

int main() {
	named_semaphore::remove("sem1");
	named_semaphore::remove("sem2");
			
	named_semaphore sem1(create_only_t(), "sem1", 0);
	named_semaphore sem2(create_only_t(), "sem2", 0);
	
	while(true) {
		sem1.wait();
		sem2.post();
	}
	
	return 0;
}