move wt* maintainance from maria to the server

include/waiting_threads.h:
  C_MODE_START/END
mysys/waiting_threads.c:
  relax the checks - auto init thd in will_wait_for,
  allow to destroy uninited thd (=noop),
  allow a "release" an unexistent resource (=noop),
sql/sql_class.cc:
  move wt* maintainance from maria to the server.
  do THD::cleanup after ha_close_connection() and plugin_thdvar_cleanup().
storage/maria/unittest/trnman-t.c:
  update to new prototype

1 files changed, 8 insertions, 2 deletions

diff --git a/mysys/waiting_threads.c b/mysys/waiting_threads.c
index 491e7c3a726..55f65be2811 100644
--- a/mysys/waiting_threads.c
+++ b/mysys/waiting_threads.c
@@ -208,6 +208,9 @@ void wt_thd_destroy(WT_THD *thd)
 {
   DBUG_ENTER("wt_thd_destroy");
 
+  if (thd->my_resources.buffer == 0)
+    DBUG_VOID_RETURN; /* nothing to do */
+
   DBUG_ASSERT(thd->my_resources.elements == 0);
   delete_dynamic(&thd->my_resources);
   lf_hash_put_pins(thd->pins);
@@ -447,6 +450,9 @@ int wt_thd_will_wait_for(WT_THD *thd, WT_THD *blocker, WT_RESOURCE_ID *resid)
   DBUG_PRINT("wt", ("enter: thd=%s, blocker=%s, resid=%llu",
                     thd->name, blocker->name, resid->value.num));
 
+  if (unlikely(thd->my_resources.buffer == 0))
+    wt_thd_init(thd);
+
   if (thd->waiting_for == 0)
   {
     uint keylen;
@@ -647,8 +653,8 @@ void wt_thd_release(WT_THD *thd, WT_RESOURCE_ID *resid)
       }
     }
   }
-  DBUG_ASSERT(!resid);
-  reset_dynamic(&thd->my_resources);
+  if (!resid)
+    reset_dynamic(&thd->my_resources);
   DBUG_VOID_RETURN;
 }