tinyds: use 'rand_r' instead of function 'rand'

For thread safety, rand_r is preferred to use.

Change-Id: I6076f937595480a28fb83e9efadc02e53f345542

diff --git a/examples/tinyds.c b/examples/tinyds.c
index 91f2965..32087e6 100644 (file)
--- a/examples/tinyds.c
+++ b/examples/tinyds.c
@@ -1108,6 +1108,8 @@ view_handle_xdg_surface_destroy(struct wl_listener *listener, void *data)
 static void
 view_handle_surface_commit(struct wl_listener *listener, void *data)
 {
+    static unsigned int seedx = 1;
+    static unsigned int seedy = 43210;
     struct tinyds_view *view;
     struct ds_buffer *buffer;
     int w = 0, h = 0;
@@ -1121,8 +1123,8 @@ view_handle_surface_commit(struct wl_listener *listener, void *data)
 
         ds_buffer_get_size(buffer, &w, &h);
 
-        view->x = rand() % (OUTPUT_WIDTH - w);
-        view->y = rand() % (OUTPUT_HEIGHT - h);
+        view->x = rand_r(&seedx) % (OUTPUT_WIDTH - w);
+        view->y = rand_r(&seedy) % (OUTPUT_HEIGHT - h);
     }
 
     output_damage(view->server->output);