//----------------------------------------------------- // ballhausen.cc: justicia //----------------------------------------------------- #include #include #include #include #include #include //----------------------------------------------------- using namespace std::literals; //----------------------------------------------------- const size_t N = 24; // nĂºmero de hebras //----------------------------------------------------- std::latch latch(N); std::mutex mutex; std::counting_semaphore acceso(N / 2); //----------------------------------------------------- void seccion_critica(char c) { for (char i = 0; i < 10; ++i) std::cout << c; std::cout << '\n'; } //----------------------------------------------------- void lector(char c) { latch.arrive_and_wait(); while (true) { acceso.acquire(); seccion_critica(c); acceso.release(); } } //----------------------------------------------------- void escritor(char c) { latch.arrive_and_wait(); while (true) { mutex.lock(); for (size_t i = 0; i < N / 2; ++i) acceso.acquire(); mutex.unlock(); seccion_critica(c); for (size_t i = 0; i < N / 2; ++i) acceso.release(); } } //----------------------------------------------------- int main() { for (size_t i = 0; i < N / 2; ++i) { std::thread(lector, '0' + i).detach(); std::thread(escritor, 'a' + i).detach(); } std::this_thread::sleep_for(12ms); } //-----------------------------------------------------