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qapi: Smooth visitor error checking in generated code

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Use visitor functions' return values to check for failure.  Eliminate
error_propagate() that are now unnecessary.  Delete @err that are now
unused.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200707160613.848843-41-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2020-07-07 18:06:08 +02:00
parent b11a093c60
commit cdd2b228b9
3 changed files with 55 additions and 84 deletions
Download patch file Download diff file Expand all files Collapse all files

22
scripts/qapi/commands.py
View file

@ -47,6 +47,7 @@ def gen_call(name, arg_type, boxed, ret_type):
ret = mcgen('''
%(lhs)sqmp_%(c_name)s(%(args)s&err);
error_propagate(errp, err);
''',
c_name=c_name(name), args=argstr, lhs=lhs)
if ret_type:
@ -55,7 +56,7 @@ def gen_call(name, arg_type, boxed, ret_type):
goto out;
}
qmp_marshal_output_%(c_name)s(retval, ret, &err);
qmp_marshal_output_%(c_name)s(retval, ret, errp);
''',
c_name=ret_type.c_name())
return ret
@ -66,15 +67,12 @@ def gen_marshal_output(ret_type):
static void qmp_marshal_output_%(c_name)s(%(c_type)s ret_in, QObject **ret_out, Error **errp)
{
Error *err = NULL;
Visitor *v;
v = qobject_output_visitor_new(ret_out);
visit_type_%(c_name)s(v, "unused", &ret_in, &err);
if (!err) {
if (visit_type_%(c_name)s(v, "unused", &ret_in, errp)) {
visit_complete(v, ret_out);
}
error_propagate(errp, err);
visit_free(v);
v = qapi_dealloc_visitor_new();
visit_type_%(c_name)s(v, "unused", &ret_in, NULL);
@ -104,6 +102,7 @@ def gen_marshal(name, arg_type, boxed, ret_type):
%(proto)s
{
Error *err = NULL;
bool ok = false;
Visitor *v;
''',
proto=build_marshal_proto(name))
@ -123,28 +122,26 @@ def gen_marshal(name, arg_type, boxed, ret_type):
ret += mcgen('''
v = qobject_input_visitor_new(QOBJECT(args));
visit_start_struct(v, NULL, NULL, 0, &err);
if (err) {
if (!visit_start_struct(v, NULL, NULL, 0, errp)) {
goto out;
}
''')
if have_args:
ret += mcgen('''
visit_type_%(c_arg_type)s_members(v, &arg, &err);
if (!err) {
visit_check_struct(v, &err);
if (visit_type_%(c_arg_type)s_members(v, &arg, errp)) {
ok = visit_check_struct(v, errp);
}
''',
c_arg_type=arg_type.c_name())
else:
ret += mcgen('''
visit_check_struct(v, &err);
ok = visit_check_struct(v, errp);
''')
ret += mcgen('''
visit_end_struct(v, NULL);
if (err) {
if (!ok) {
goto out;
}
''')
@ -154,7 +151,6 @@ def gen_marshal(name, arg_type, boxed, ret_type):
ret += mcgen('''
out:
error_propagate(errp, err);
visit_free(v);
''')