* 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, 10 insertions, 0 deletions

diff --git a/vm.c b/vm.c
index 2a25cb1f37..aca61c6906 100644
--- a/vm.c
+++ b/vm.c
@@ -173,6 +173,14 @@ vm_get_ruby_level_caller_cfp(rb_thread_t *th, rb_control_frame_t *cfp)
     return 0;
 }
 
+/* at exit */
+
+void
+ruby_vm_at_exit(void (*func)(rb_vm_t *))
+{
+    rb_ary_push((VALUE)&GET_VM()->at_exit, (VALUE)func);
+}
+
 /* Env */
 
 /*
@@ -1572,6 +1580,8 @@ vm_init2(rb_vm_t *vm)
 {
     MEMZERO(vm, rb_vm_t, 1);
     vm->src_encoding_index = -1;
+    vm->at_exit.basic.flags = (T_ARRAY | RARRAY_EMBED_FLAG) & ~RARRAY_EMBED_LEN_MASK; /* len set 0 */
+    vm->at_exit.basic.klass = 0;
 }
 
 /* Thread */