* ext/objspace/objspace.c: add ObjectSpace#reachable_objects_from.

  This method returns an array of objects referenced by given object.
  If given object is special objects such as true/false/nil/Fixnum etc
  then it returns nil. See rdoc for details.
  [ruby-core:39772]
* test/objspace/test_objspace.rb: add a test for this method.
* gc.c: add rb_objspace_reachable_objects_from().
  To make this function, add several member `mark_func_data'
  to rb_objspace_t.  If mark_func_data is not null, then
  gc_mark() calls mark_func_data::mark_func.
* gc.h: export rb_objspace_reachable_objects_from().



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37094 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/gc.h b/gc.h
index 96d22a6e09..741945349d 100644
--- a/gc.h
+++ b/gc.h
@@ -87,7 +87,10 @@ int ruby_get_stack_grow_direction(volatile VALUE *addr);
 #pragma GCC visibility push(default)
 #endif
 
+/* exports for objspace module */
 size_t rb_objspace_data_type_memsize(VALUE obj);
+VALUE rb_objspace_reachable_objects_from(VALUE obj);
+
 void rb_objspace_each_objects(
     int (*callback)(void *start, void *end, size_t stride, void *data),
     void *data);