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lab_07_1.cpp
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lab_07_1.cpp
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#include <unistd.h>
#include <pthread.h>
#include <iostream>
#include <fstream>
#include <semaphore.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <signal.h>
#include "getch.cpp"
using namespace std;
struct p_args
{
bool work;
};
void *some_p1(void *arg)
{
cout.setf(ios::unitbuf);
cout << "Поток 1 начал работу" << endl;
p_args *temp = (p_args *)arg;
struct stat file_status;
int filedes = -1;
int status;
char data[1];
data[0] = 'A';
while (temp->work)
{
if (filedes == -1)
filedes = open("my_pipe", O_WRONLY | O_NONBLOCK);
if (filedes == -1)
{
// perror("open");
cout << "Канал не готов к записи" << endl;
sleep(1);
continue;
}
else
{
if (data[0] == 'D') data[0] = 'A';
status = write(filedes, data, 1);
if (status == -1)
{
cout << "Канал не готов к записи" << endl;
}
else cout << "Записано: " << data << endl;
cout.flush();
data[0] += 1;
sleep(1);
}
}
close(filedes);
cout << "Поток 1 закончил работу" << endl;
return 0;
}
int main()
{
cout.setf(ios::unitbuf);
pthread_t f1;
p_args args;
args.work = true;
signal(SIGPIPE, SIG_IGN);
int status = 0;
status = mkfifo("my_pipe", S_IRUSR| S_IWUSR);
if (status == -1)
perror("mkfifo");
status = pthread_create(&f1, 0, some_p1, &args);
if (!status)
cout << "Поток 1 создан" << endl;
else
cout << "Ошибка создания потока: " << status << endl;
getch();
args.work = false;
pthread_join(f1, 0);
cout << "Поток 1 остановлен" << endl;
// unlink("my_pipe");
return 0;
}