LAB / WORK_5 / main

#include <stdio.h>
#include <pthread.h>
#include <unistd.h>

static volatile int counter = 0;
static pthread_mutex_t myMutex;

void *mutex_testing(void *param)
{
        int i;
        for(i = 0; i < 5; i++)
        {
                pthread_mutex_lock(&myMutex);
                counter++;
                sleep(1);
                printf("thread [%i] entered\tcounter = %i\n", *reinterpret_cast<int*>(param),  counter);
                pthread_mutex_unlock(&myMutex);
        }
}

int main()
{
        int one = 1, two = 2, three = 3;
        pthread_t thread1, thread2, thread3;
        pthread_mutex_init(&myMutex,nullptr);
        pthread_create(&thread1, nullptr, mutex_testing, reinterpret_cast<void*>(&one));
        pthread_create(&thread2, nullptr, mutex_testing, reinterpret_cast<void*>(&two));
        pthread_create(&thread3, nullptr, mutex_testing, reinterpret_cast<void*>(&three));
        pthread_join(thread1, nullptr);
        pthread_join(thread2, nullptr);
        pthread_join(thread3, nullptr);
        pthread_mutex_destroy(&myMutex);
        return 0;
}