Add support for @virtual markup in spice protocol

This means the member is not sent on the network at all.
Instead its initialized to the attribute argument when demarshalled.

This is useful for backwards compatibility support.

1 files changed, 7 insertions, 0 deletions

diff --git a/python_modules/demarshal.py b/python_modules/demarshal.py
index eee659f..a0697a9 100644
--- a/python_modules/demarshal.py
+++ b/python_modules/demarshal.py
@@ -400,6 +400,9 @@ def write_validate_item(writer, container, item, scope, parent_scope, start,
 
 def write_validate_member(writer, container, member, parent_scope, start,
                           want_nw_size, want_mem_size, want_extra_size):
+    if member.has_attr("virtual"):
+        return
+
     if member.has_minor_attr():
         prefix = "if (minor >= %s)" % (member.get_minor_attr())
         newline = False
@@ -740,6 +743,10 @@ def write_parse_pointer(writer, t, at_end, dest, member_name, is_64bit, scope):
         writer.statement("n_ptr++")
 
 def write_member_parser(writer, container, member, dest, scope):
+    if member.has_attr("virtual"):
+        writer.assign(dest.get_ref(member.name), member.attributes["virtual"][0])
+        return
+
     if member.is_switch():
         write_switch_parser(writer, container, member, dest, scope)
         return