1 files changed, 42 insertions, 0 deletions
diff --git a/libodb/odb/callback.hxx b/libodb/odb/callback.hxx
new file mode 100644
index 0000000..aaa066f
--- /dev/null
+++ b/libodb/odb/callback.hxx
@@ -0,0 +1,42 @@
+// file      : odb/callback.hxx
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_CALLBACK_HXX
+#define ODB_CALLBACK_HXX
+
+#include <odb/pre.hxx>
+
+#include <odb/forward.hxx>        // odb::core
+
+namespace odb
+{
+  struct callback_event
+  {
+    enum value
+    {
+      pre_persist,
+      post_persist,
+      pre_load,
+      post_load,
+      pre_update,
+      post_update,
+      pre_erase,
+      post_erase
+    };
+
+    callback_event (value v): v_ (v) {}
+    operator value () const {return v_;}
+
+  private:
+    value v_;
+  };
+
+  namespace common
+  {
+    using odb::callback_event;
+  }
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_CALLBACK_HXX