Add support for transaction multiplexing

Also delay getting a connection until after we do all the sanity
checks (e.g., that there is no active transaction). Otherwise we
are running risk of getting blocked rather than throwing an
exception.

1 files changed, 6 insertions, 0 deletions

diff --git a/odb/tracer/transaction.ixx b/odb/tracer/transaction.ixx
index a36c426..d936e8d 100644
--- a/odb/tracer/transaction.ixx
+++ b/odb/tracer/transaction.ixx
@@ -31,5 +31,11 @@ namespace odb
       return static_cast<transaction_impl&> (
         odb::transaction::implementation ());
     }
+
+    inline void transaction::
+    current (transaction& t)
+    {
+      odb::transaction::current (t);
+    }
   }
 }