Update result_ptr to be standard and safe

1 files changed, 16 insertions, 3 deletions

diff --git a/odb/pgsql/result-ptr.hxx b/odb/pgsql/result-ptr.hxx
index 1772cc9..4cfe58d 100644
--- a/odb/pgsql/result-ptr.hxx
+++ b/odb/pgsql/result-ptr.hxx
@@ -21,23 +21,36 @@ namespace odb
     class LIBODB_PGSQL_EXPORT result_ptr
     {
     public:
-      result_ptr (PGresult* r)
+      result_ptr (PGresult* r = 0)
           : r_ (r)
       {
       }
 
       ~result_ptr ()
       {
-        if (r_)
+        if (r_ != 0)
           PQclear (r_);
       }
 
       PGresult*
-      get ()
+      get () const
       {
         return r_;
       }
 
+      void
+      reset (PGresult* r = 0)
+      {
+        if (r_ != 0)
+          PQclear (r_);
+
+        r_ = r;
+      }
+
+    private:
+      result_ptr (const result_ptr&);
+      result_ptr& operator= (const result_ptr&);
+
     private:
       PGresult* r_;
     };