#include <stdlib.h>
#include <boost/interprocess/sync/named_mutex.hpp>

int main(void) {

	using namespace boost::interprocess;

	named_mutex mutex(open_or_create, "mutX");	// This mutex is non-recursive
	// the mutex should be unlocked initially

	mutex.unlock();	// This should have no effect, as it already is unlocked
	mutex.unlock();	// This should have no effect, as it already is unlocked

	mutex.lock();	// Now the mutex should be locked
	mutex.lock();	// This should never return, as the mutex is already locked!

	return EXIT_FAILURE;	// In case we arrived here, something went wrong
}