1 files changed, 87 insertions, 0 deletions
diff --git a/protocols/ace/RMCast/Stack.h b/protocols/ace/RMCast/Stack.h
new file mode 100644
index 00000000000..e371370977d
--- /dev/null
+++ b/protocols/ace/RMCast/Stack.h
@@ -0,0 +1,87 @@
+// file      : ace/RMCast/Stack.h
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// cvs-id    : $Id$
+
+#ifndef ACE_RMCAST_STACK_H
+#define ACE_RMCAST_STACK_H
+
+#include <ace/RMCast/Protocol.h>
+
+namespace ACE_RMCast
+{
+  struct Out_Element
+  {
+    virtual
+    ~Out_Element ()
+    {
+    }
+
+    Out_Element ()
+        : out_ (0)
+    {
+    }
+
+    virtual void
+    out_start (Out_Element* out)
+    {
+      out_ = out;
+    }
+
+    virtual void
+    send (Message_ptr m)
+    {
+      if (out_) out_->send (m);
+    }
+
+    virtual void
+    out_stop ()
+    {
+      out_ = 0;
+    }
+
+  protected:
+    Out_Element* out_;
+  };
+
+
+  struct In_Element
+  {
+    virtual
+    ~In_Element ()
+    {
+    }
+
+    In_Element ()
+        : in_ (0)
+    {
+    }
+
+    virtual void
+    in_start (In_Element* in)
+    {
+      in_ = in;
+    }
+
+    virtual void
+    recv (Message_ptr m)
+    {
+      if (in_) in_->recv (m);
+    }
+
+    virtual void
+    in_stop ()
+    {
+      in_ = 0;
+    }
+
+  protected:
+    In_Element* in_;
+  };
+
+  struct Element : In_Element, Out_Element
+  {
+  };
+
+}
+
+#endif  // ACE_RMCAST_STACK_H