thread example return values

thread_examples/thread_example.c

@@ -24,7 +24,7 @@ void * task_a(void * ctx)
     for(i=0; i < d->count; ++i){
 	printf("task_a: %d\n",i);
     }
-    return NULL;
+    return (void*) 17;
 }
 
 void * task_b(void * ctx)
@@ -36,7 +36,7 @@ void * task_b(void * ctx)
     for(i=0; i < d->count; ++i){
 	printf("task_b: %d\n",i);
     }
-    return NULL;
+    return (void*) 42;
 }
 
 
@@ -45,6 +45,10 @@ int main()
     struct global_data data = {10};
     pthread_t thread_a;
     pthread_t thread_b;
+#ifdef RETURN_INT
+    void *ret_a = 0;
+    void *ret_b = 0;
+#endif
 
 
     if(pthread_create(&thread_a, NULL, task_a, &data)){
@@ -55,7 +59,13 @@ int main()
 	printf("Failed to create thread_b\n");
 	exit(2);
     }
+#ifdef RETURN_INT
+    pthread_join(thread_a, &ret_a);
+    pthread_join(thread_b, &ret_b);
+    printf("thread_a returned: %d\nthread_b returned: %d\n", (int)(long)ret_a, (int)(long)ret_b);
+#else
     pthread_join(thread_a, NULL);
     pthread_join(thread_b, NULL);
+#endif
    return 0; 
 }