gistfile1.cpp

class MutexGuard
{
private:
	Mutex & mutex_;

public:
	MutexGuard(Mutex & mutex) : mutex_(mutex)
	{
		mutex_.aquire();
	}

	~MutexGuard()
	{
		mutex_.release();
	}
};

(...)

void concurrent_operation()
{
	(....);

	MutexGuard guard(my_mutex);
	// only one thread here...
	(...);
}