* vm.c (ruby_vm_at_exit): new API. This enables extension libs to

	  hook a VM termination.  Right now, because the VM we have is
	  process global, most extensions do not deallocate resources and
	  leave them to Operating System's reaping userland processes.  But
	  in a future we plan to have multiple VMs to run simultaneously in
	  a single process (MVM project).  At that stage we can no longer
	  rely on OSes and have to manage every resources to be reclaimed
	  properly.  So it is.  For a forward-compatibility reason this API
	  is introduced now, encouraging you to be as gentle as you can for
	  your resources; that is, tidy up your room.

	* include/ruby/vm.h: ditto.

	* vm_core.h (rb_vm_struct): new field.

	* vm.c (vm_init2): initialize above new field.

	* eval.c (ruby_cleanup): trigger those hooks.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30050 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/vm_core.h b/vm_core.h
index 0ff54f2216..1a734b31e0 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -317,6 +317,12 @@ typedef struct rb_vm_struct {
 #if defined(ENABLE_VM_OBJSPACE) && ENABLE_VM_OBJSPACE
     struct rb_objspace *objspace;
 #endif
+
+    /*
+     * @shyouhei notes that this is not for storing normal Ruby
+     * objects so do *NOT* mark this when you GC.
+     */
+    struct RArray at_exit;
 } rb_vm_t;
 
 typedef struct {