#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
pthread_mutex_t mutex;
int a=0;
void *f1(void *arg)
{

int n=*((int *)(&arg)); //podstawianie argumentu
int i=0;
int j;
for(i=0;i<10000000;i++);
while(1)
{
    pthread_mutex_lock(&mutex);
printf("Jestem watkiem nr %d \n",n);
for(i=0;i<10000000;i++);
    pthread_mutex_unlock(&mutex);
}
}


void *f3(void *arg)
{

int n=*((int *)(&arg)); //podstawianie argumentu
int i=0;
int j;
for(i=0;i<10000000;i++);
while(1)
{
    pthread_mutex_lock(&mutex);
printf("Jestem watkiem nr %d \n",n);
for(i=0;i<10000000;i++);
    pthread_mutex_unlock(&mutex);
}
}

void *f2(void *arg)
{

int n=*((int *)(&arg)); //podstawianie argumentu
int i=0;
int j;
for(i=0;i<10000000;i++);
while(1)
{
    pthread_mutex_lock(&mutex);
printf("Jestem watkiem nr %d \n",n);
for(i=0;i<10000000;i++);
    pthread_mutex_unlock(&mutex);
}
}

main()
{
pthread_mutex_init(&mutex,NULL);
int i;
pthread_t a,b,c;

pthread_create(&a,NULL,f1,(void *)1);
pthread_create(&b,NULL,f2,(void *)2);
pthread_create(&c,NULL,f3,(void *)3);

pthread_join(a,NULL);
pthread_join(b,NULL);
pthread_join(c,NULL);
pthread_mutex_destroy(&mutex);
}