at_exit list

* vm_core.h (rb_vm_struct): make at_exit a single linked list but
  not RArray, not to mark the registered functions by the write
  barrier.  based on the patches by Evan Phoenix.
  [ruby-core:73908] [Bug #12095]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54484 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 5 deletions

diff --git a/vm_core.h b/vm_core.h
index bf9ea1464e..5c1e718efe 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -462,6 +462,14 @@ enum ruby_basic_operators {
 #define GetVMPtr(obj, ptr) \
   GetCoreDataFromValue((obj), rb_vm_t, (ptr))
 
+struct rb_vm_struct;
+typedef void rb_vm_at_exit_func(struct rb_vm_struct*);
+
+typedef struct rb_at_exit_list {
+    rb_vm_at_exit_func *func;
+    struct rb_at_exit_list *next;
+} rb_at_exit_list;
+
 struct rb_objspace;
 struct rb_objspace *rb_objspace_alloc(void);
 void rb_objspace_free(struct rb_objspace *);
@@ -530,11 +538,7 @@ typedef struct rb_vm_struct {
 
     struct rb_objspace *objspace;
 
-    /*
-     * @shyouhei notes that this is not for storing normal Ruby
-     * objects so do *NOT* mark this when you GC.
-     */
-    struct RArray at_exit;
+    rb_at_exit_list *at_exit;
 
     VALUE *defined_strings;
     st_table *frozen_strings;