vm_trace: implement postponed_jobs as st_table

st_table allows the use of st_shift to act as an order-preserving
queue while allowing fast lookups to prevent duplicate jobs.

In typical Ruby apps, this table will only have one entry
for gc_finalize_deferred_register.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63451 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 2 deletions

diff --git a/vm_core.h b/vm_core.h
index 626b82ee1b..e7fc515680 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -591,8 +591,7 @@ typedef struct rb_vm_struct {
     struct st_table *ensure_rollback_table;
 
     /* postponed_job */
-    struct rb_postponed_job_struct *postponed_job_buffer;
-    int postponed_job_index;
+    struct st_table *postponed_jobs;
 
     int src_encoding_index;