Add shuffler and paramaterize the open_sem function additionally

fb_arc_set/shared/sem.c

@@ -22,12 +22,21 @@ static sem_t *mutex;
  * @brief Function that executes sem_open(3) and does error handling.
  * @details The function executes sem_open(3), giving it a semaphor name and size as parameters,
  *          and handles the errors if any. The same behaviour as sem_open(3) should be expected.
+ *          The type parameter is used to determine how the semaphore should be opened:
+ *          - as a supervisor: 0
+ *          - as a generator: 1
  *          Returns a new semaphore
- * @param sem_name, sem_size
+ * @param sem_name, sem_size, type
  * @return res
  **/
-sem_t * open_sem(char *sem_name, size_t sem_size) {
-    sem_t *res = sem_open(sem_name, O_CREAT | O_EXCL, 0600, sem_size);
+sem_t * open_sem(char *sem_name, size_t sem_size, short type) {
+    sem_t *res;
+
+    if(type == 0)
+        res = sem_open(sem_name, O_CREAT | O_EXCL, 0600, sem_size);
+    else
+        res = sem_open(sem_name, sem_size);
+
     if(res == SEM_FAILED) {
         fprintf(stderr, "ERROR: Failed opening semaphore\n");
         exit(EXIT_FAILURE);