1 files changed, 57 insertions, 0 deletions
diff --git a/gnuradio-runtime/include/gnuradio/sptr_magic.h b/gnuradio-runtime/include/gnuradio/sptr_magic.h
new file mode 100644
index 0000000000..898edc87fd
--- /dev/null
+++ b/gnuradio-runtime/include/gnuradio/sptr_magic.h
@@ -0,0 +1,57 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008,2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef INCLUDED_GR_RUNTIME_SPTR_MAGIC_H
+#define INCLUDED_GR_RUNTIME_SPTR_MAGIC_H
+
+#include <gnuradio/api.h>
+#include <boost/shared_ptr.hpp>
+
+namespace gr {
+  class basic_block;
+  class hier_block2;
+}
+
+namespace gnuradio {
+  namespace detail {
+
+    class GR_RUNTIME_API sptr_magic
+    {
+    public:
+      static boost::shared_ptr<gr::basic_block> fetch_initial_sptr(gr::basic_block *p);
+      static void create_and_stash_initial_sptr(gr::hier_block2 *p);
+    };
+  };
+
+  /*
+   * \brief New!  Improved!  Standard method to get/create the
+   * boost::shared_ptr for a block.
+   */
+  template<class T>
+  boost::shared_ptr<T>
+  get_initial_sptr(T *p)
+  {
+    return boost::dynamic_pointer_cast<T, gr::basic_block>
+      (detail::sptr_magic::fetch_initial_sptr(p));
+  }
+}
+
+#endif /* INCLUDED_GR_RUNTIME_SPTR_MAGIC_H */