#include <iostream>
#include <unistd.h>
#include <stdio.h>
#include <termios.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <semaphore.h>
#include <fstream>

const int name_size = 10;

const char sem_name[name_size] = "/LAB5";
const char file_name[name_size] = "lab5.txt";

std::ofstream file;

struct argum
{
        int fl = 0;
        sem_t* sem_id;
};

void* _thread(void* args)
{
        char ch = '1';
        while(static_cast<argum*>(args)->fl != 1)
        {
                sem_wait(static_cast<argum*>(args)->sem_id);
                for (int i = 1; i < 5; ++i)
                {
                        file << ch;
                        file.flush();
                        std::cout << ch;
                        std::cout.flush();
                        sleep(1);
                }
                sem_post(static_cast<argum*>(args)->sem_id);
                sleep(1);
        }
        auto code = new int;
        *code = 1;
        pthread_exit(code);
}



int main(int argc, char *argv[])
{
        pthread_t id;
        void *ret;
        argum arguments;
        arguments.sem_id = sem_open(sem_name, O_CREAT, 0644, 1);
        std::cout << arguments.sem_id << '\n';
        file.open(file_name, std::ios_base::app);
        if(pthread_create(&id,NULL,_thread,&arguments))
        {
                return 1;
        }
        else
        {
                std::cout << "thread started \n";
        }
        std::cout << "system paused, press enter to continue\n";
        getchar();
        arguments.fl = 1;
        pthread_join(id, &ret);
        std::cout << "thread returned: " << *(int *)ret << "\n";
        delete (int *)ret;
        file.close();
        sem_close(arguments.sem_id);
        sem_unlink(sem_name);
        return 0;

}