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, 18 insertions, 0 deletions

diff --git a/odb/sqlite/database.cxx b/odb/sqlite/database.cxx
index 6ce4621..04f788b 100644
--- a/odb/sqlite/database.cxx
+++ b/odb/sqlite/database.cxx
@@ -83,6 +83,24 @@ namespace odb
       details::options::print_usage (os);
     }
 
+    transaction_impl* database::
+    begin ()
+    {
+      return new transaction_impl (*this, transaction_impl::deferred);
+    }
+
+    transaction_impl* database::
+    begin_immediate ()
+    {
+      return new transaction_impl (*this, transaction_impl::immediate);
+    }
+
+    transaction_impl* database::
+    begin_exclusive ()
+    {
+      return new transaction_impl (*this, transaction_impl::exclusive);
+    }
+
     odb::connection* database::
     connection_ ()
     {