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

#define N 3

int Counter = 0;
pthread_mutex_t Mutex;
pthread_t tid[N];

void* thr_inc_module(void* ptr){
	int* module = (int*)ptr;

	while(Counter < 30){
	sleep(1);

	pthread_mutex_lock(&Mutex);
	if(Counter % 3 == module[0]){
			printf("Thread: [%d] -- Counter=%d\n",*module,Counter++);
	}

	pthread_mutex_unlock(&Mutex);

	}
	return NULL;
}


int main(int argc, char *argv[]) {
	int i;
	int module[3];

	pthread_mutex_init(&Mutex,NULL);

	module[0] = 0;
	module[1] = 1;
	module[2] = 2;

	for(i=0;i<N;i++){
	   if (pthread_create(&tid[i], NULL, thr_inc_module, (void*)&module[i]) != 0) {
		  printf("Error creating thread.\n");
		  return -1;
	   }
	}

	for(i=0;i<N;i++){
	   if(pthread_join(tid[i], NULL) != 0) {
		  printf("Error joining thread.\n");
		  return -1;
	   }
	}
   return 0;
}