process pool mostly works, still WIP

src/util.c

@@ -103,7 +103,9 @@ void progress_bar_print_json(size_t done, size_t count, size_t tn_size, size_t i
 
 void progress_bar_print(double percentage, size_t tn_size, size_t index_size) {
 
+    // TODO: Fix this with shm/ctx
     static int last_val = -1;
+
     int val = (int) (percentage * 100);
     if (last_val == val || val > 100) {
         return;