From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47946) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a69NC-0004J3-HQ for qemu-devel@nongnu.org; Mon, 07 Dec 2015 22:55:31 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a69NB-0003Wl-3T for qemu-devel@nongnu.org; Mon, 07 Dec 2015 22:55:30 -0500 Received: from mx1.redhat.com ([209.132.183.28]:56238) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a69NA-0003Wf-Pu for qemu-devel@nongnu.org; Mon, 07 Dec 2015 22:55:28 -0500 From: Eric Blake Date: Mon, 7 Dec 2015 20:54:57 -0700 Message-Id: <1449546921-6378-8-git-send-email-eblake@redhat.com> In-Reply-To: <1449546921-6378-1-git-send-email-eblake@redhat.com> References: <1449546921-6378-1-git-send-email-eblake@redhat.com> Subject: [Qemu-devel] [PATCH v7 07/31] qapi: Improve generated event use of qapi visitor List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: armbru@redhat.com, Michael Roth All other successful clients of visit_start_struct() were paired with an unconditional visit_end_struct(); but the generated code for events was relying on qmp_output_visitor_cleanup() to work on an incomplete visit. Alter the code to guarantee that the struct is completed, which will make a future patch to split visit_end_struct() easier to reason about. While at it, drop some assertions and comments that are not present in other uses of the qmp output visitor, rearrange the declaration to make it easier for a future patch to introduce the notion of a boxed event visit, and pass NULL rather than "" as the 'kind' parameter (matching most other uses where obj is NULL). Signed-off-by: Eric Blake --- v7: place earlier in series, adjust handling of 'kind' v6: new patch If desired, I can defer the hunk re-ordering the declaration of obj to later in the series where it actually comes in handy. --- scripts/qapi-event.py | 14 ++++++-------- scripts/qapi.py | 5 +++-- 2 files changed, 9 insertions(+), 10 deletions(-) diff --git a/scripts/qapi-event.py b/scripts/qapi-event.py index 720486f..e37c07a 100644 --- a/scripts/qapi-event.py +++ b/scripts/qapi-event.py @@ -41,9 +41,9 @@ def gen_event_send(name, arg_type): if arg_type and arg_type.members: ret += mcgen(''' + QObject *obj; QmpOutputVisitor *qov; Visitor *v; - QObject *obj; ''') @@ -61,25 +61,23 @@ def gen_event_send(name, arg_type): if arg_type and arg_type.members: ret += mcgen(''' qov = qmp_output_visitor_new(); - g_assert(qov); - v = qmp_output_get_visitor(qov); - g_assert(v); - /* Fake visit, as if all members are under a structure */ - visit_start_struct(v, NULL, "", "%(name)s", 0, &err); + visit_start_struct(v, NULL, NULL, "%(name)s", 0, &err); ''', name=name) ret += gen_err_check() - ret += gen_visit_fields(arg_type.members, need_cast=True) + ret += gen_visit_fields(arg_type.members, need_cast=True, + label='out_obj') ret += mcgen(''' +out_obj: visit_end_struct(v, &err); if (err) { goto out; } obj = qmp_output_get_qobject(qov); - g_assert(obj != NULL); + g_assert(obj); qdict_put_obj(qmp, "data", obj); ''') diff --git a/scripts/qapi.py b/scripts/qapi.py index 7dec611..497eaba 100644 --- a/scripts/qapi.py +++ b/scripts/qapi.py @@ -1636,7 +1636,8 @@ def gen_err_check(label='out', skiperr=False): label=label) -def gen_visit_fields(members, prefix='', need_cast=False, skiperr=False): +def gen_visit_fields(members, prefix='', need_cast=False, skiperr=False, + label='out'): ret = '' if skiperr: errparg = 'NULL' @@ -1664,7 +1665,7 @@ def gen_visit_fields(members, prefix='', need_cast=False, skiperr=False): c_type=memb.type.c_name(), prefix=prefix, cast=cast, c_name=c_name(memb.name), name=memb.name, errp=errparg) - ret += gen_err_check(skiperr=skiperr) + ret += gen_err_check(skiperr=skiperr, label=label) if memb.optional: pop_indent() -- 2.4.3