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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <pthread.h>
#include <unistd.h>
#include <string.h>
int x = 0;
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
void*
fn(void* arg)
{
char* thread_name = (char*) arg;
int xrand;
long hit;
hit = 0;
while (1) {
xrand = rand() % 1000;
usleep(xrand);
pthread_mutex_lock(&mutex);
if (x > 500) {
printf("I'm the thread %s with hit = '%ld' and x = '%d'\n", thread_name, hit, x);
pthread_mutex_unlock(&mutex);
break;
}
x++;
pthread_mutex_unlock(&mutex);
hit++;
}
pthread_exit((void*) hit);
}
int
main()
{
pthread_t tA, tB;
void *result1, *result2;
long total;
srand(time(NULL));
pthread_create(&tA, NULL, &fn, (void*) "A");
pthread_create(&tB, NULL, &fn, (void*) "B");
pthread_join(tA, &result1);
pthread_join(tB, &result2);
total = (long) result1 + (long) result2;
printf("Total = %ld + %ld = %ld'\n", (long) result1, (long) result2, total);
return 0;
}
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