sttuff

Examples/pthreads/pthreads_race_atomic.c

@@ -1,21 +1,22 @@
 /*
  * pthreads_race_atomic.c - Uses an atomic add instruction to prevent
  *                          the race condition that can happen when
- *                          multiple threads modify a global value at the 
+ *                          multiple threads modify a global value at the
  *                          same time.
  */
 
 #include <pthread.h>
+#include <stdatomic.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <stdatomic.h>
 
 atomic_int global_value = 0;
 
-void* thread_routine()
+void *thread_routine()
 {
-    for(int i = 0; i < 100000000; i++) {
+    for (int i = 0; i < 1000000; i++)
+    {
         atomic_fetch_add(&global_value, 1);
     }
     return NULL;
@@ -25,15 +26,18 @@ int main()
 {
     // Create 5 threads
     pthread_t thr_id[5];
-    for(int i = 0; i < 5; i++) {
-        if(pthread_create(&thr_id[i], NULL, thread_routine, NULL) == -1) {
+    for (int i = 0; i < 5; i++)
+    {
+        if (pthread_create(&thr_id[i], NULL, thread_routine, NULL) == -1)
+        {
             printf("COULD NOT CREATE A THREAD\n");
             exit(EXIT_FAILURE);
         }
     }
 
     // Wait for all threads to finish
-    for(int i = 0; i < 5; i++) {
+    for (int i = 0; i < 5; i++)
+    {
         pthread_join(thr_id[i], NULL);
     }