//---------------------------------------------------------
// interruptor.h
//---------------------------------------------------------

#include <mutex>

//---------------------------------------------------------

class interruptor
{
public:
    void lock(std::mutex &llave)
    {
        std::lock_guard<std::mutex> lock(mutex);
        if (++contador == 1)
            llave.lock();
    }

    void unlock(std::mutex &llave)
    {
        std::lock_guard<std::mutex> lock(mutex);
        if (--contador == 0)
            llave.unlock();
    }

protected:
    std::mutex mutex;
    size_t contador = 0;
};

//---------------------------------------------------------