add "copy: true" option for Ractor.make_shareable

Ractor.make_shareable(obj) tries to make obj a shareable object
by changing the attribute of obj and traversable objects from obj
(mainly freeze them).

"copy: true" option is more conservative approach by make deep
copied object and make it sharable. It doesn't affect any existing
objects.

1 files changed, 10 insertions, 0 deletions

diff --git a/ractor.c b/ractor.c
index 89b4f68afb..0d850aebba 100644
--- a/ractor.c
+++ b/ractor.c
@@ -2347,6 +2347,16 @@ rb_ractor_make_shareable(VALUE obj)
     return obj;
 }
 
+VALUE
+rb_ractor_make_copy_shareable(VALUE obj)
+{
+    VALUE copy = ractor_copy(obj);
+    rb_obj_traverse(copy,
+                    make_shareable_check_shareable,
+                    null_leave, mark_shareable);
+    return copy;
+}
+
 static enum obj_traverse_iterator_result
 shareable_p_enter(VALUE obj)
 {