From 78e81069aadc609aee1e4b8137516d9cfce47b0a Mon Sep 17 00:00:00 2001
From: Constantin Michael <constantin@codesynthesis.com>
Date: Wed, 11 May 2011 10:58:27 +0200
Subject: Add transaction implementation

---
 odb/pgsql/transaction.cxx | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 odb/pgsql/transaction.cxx

(limited to 'odb/pgsql/transaction.cxx')

diff --git a/odb/pgsql/transaction.cxx b/odb/pgsql/transaction.cxx
new file mode 100644
index 0000000..2632318
--- /dev/null
+++ b/odb/pgsql/transaction.cxx
@@ -0,0 +1,26 @@
+// file      : odb/pgsql/transaction.cxx
+// author    : Constantin Michael <constantin@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#include <odb/pgsql/transaction.hxx>
+
+namespace odb
+{
+  namespace pgsql
+  {
+    transaction& transaction::
+    current ()
+    {
+      // While the impl type can be of the concrete type, the transaction
+      // object can be created as either odb:: or odb::pgsql:: type. To
+      // work around that we are going to hard-cast one to the other
+      // relying on the fact that they have the same representation and
+      // no virtual functions. The former is checked in the tests.
+      //
+      odb::transaction& b (odb::transaction::current ());
+      dynamic_cast<transaction_impl&> (b.implementation ());
+      return reinterpret_cast<transaction&> (b);
+    }
+  }
+}
-- 
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