qapi/events: add #if conditions to events

Wrap generated code with #if/#endif using an 'ifcontext' on
QAPIGenCSnippet objects.

This makes a conditional event's qapi_event_send_FOO() compile-time
conditional, but its enum QAPIEvent member remains unconditional for
now. A follow up patch "qapi-event: add 'if' condition to implicit
event enum" will improve this.

Backports commit c3cd6aa0201c126eda8dc71b60e7aa259a3e79b9 from qemu
This commit is contained in:
Marc-André Lureau 2018-07-05 12:09:03 -04:00 committed by Lioncash
parent 3826a61eae
commit 7b4961d75b
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7

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@ -185,8 +185,10 @@ class QAPISchemaGenEventVisitor(QAPISchemaModularCVisitor):
genc.add(gen_enum_lookup(self._enum_name, self._event_names))
def visit_event(self, name, info, ifcond, arg_type, boxed):
self._genh.add(gen_event_send_decl(name, arg_type, boxed))
self._genc.add(gen_event_send(name, arg_type, boxed, self._enum_name))
with ifcontext(ifcond, self._genh, self._genc):
self._genh.add(gen_event_send_decl(name, arg_type, boxed))
self._genc.add(gen_event_send(name, arg_type, boxed,
self._enum_name))
self._event_names.append(name)