odb/tracer/transaction.cxx


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// file      : odb/tracer/transaction.cxx
// author    : Boris Kolpackov <boris@codesynthesis.com>
// license   : GNU GPL v2; see accompanying LICENSE file

#include <odb/tracer/transaction.hxx>

namespace odb
{
  namespace tracer
  {
    transaction& transaction::
    current ()
    {
      // While the impl type can be of the concrete type, the transaction
      // object can be created as either odb:: or odb::tracer:: type. To
      // work around that we are going to hard-cast one two 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);
    }
  }
}