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qapi: Make visitor functions taking Error ** return bool, not void

Browse source 
See recent commit "error: Document Error API usage rules" for
rationale.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200707160613.848843-18-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2020-07-07 18:05:45 +02:00
parent 3c4b89c3b2
commit 012d4c96e2
14 changed files with 456 additions and 361 deletions
Download patch file Download diff file Expand all files Collapse all files

58
scripts/qapi/visit.py
View file

@ -23,7 +23,7 @@ def gen_visit_decl(name, scalar=False):
if not scalar:
c_type += '*'
return mcgen('''
void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_type)sobj, Error **errp);
bool visit_type_%(c_name)s(Visitor *v, const char *name, %(c_type)sobj, Error **errp);
''',
c_name=c_name(name), c_type=c_type)
@ -31,7 +31,7 @@ void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_type)sobj, Error **
def gen_visit_members_decl(name):
return mcgen('''
void visit_type_%(c_name)s_members(Visitor *v, %(c_name)s *obj, Error **errp);
bool visit_type_%(c_name)s_members(Visitor *v, %(c_name)s *obj, Error **errp);
''',
c_name=c_name(name))
@ -39,7 +39,7 @@ void visit_type_%(c_name)s_members(Visitor *v, %(c_name)s *obj, Error **errp);
def gen_visit_object_members(name, base, members, variants):
ret = mcgen('''
void visit_type_%(c_name)s_members(Visitor *v, %(c_name)s *obj, Error **errp)
bool visit_type_%(c_name)s_members(Visitor *v, %(c_name)s *obj, Error **errp)
{
Error *err = NULL;
@ -48,9 +48,8 @@ void visit_type_%(c_name)s_members(Visitor *v, %(c_name)s *obj, Error **errp)
if base:
ret += mcgen('''
visit_type_%(c_type)s_members(v, (%(c_type)s *)obj, &err);
if (err) {
goto out;
if (!visit_type_%(c_type)s_members(v, (%(c_type)s *)obj, errp)) {
return false;
}
''',
c_type=base.c_name())
@ -64,9 +63,8 @@ void visit_type_%(c_name)s_members(Visitor *v, %(c_name)s *obj, Error **errp)
name=memb.name, c_name=c_name(memb.name))
push_indent()
ret += mcgen('''
visit_type_%(c_type)s(v, "%(name)s", &obj->%(c_name)s, &err);
if (err) {
goto out;
if (!visit_type_%(c_type)s(v, "%(name)s", &obj->%(c_name)s, errp)) {
return false;
}
''',
c_type=memb.type.c_name(), name=memb.name,
@ -112,15 +110,9 @@ void visit_type_%(c_name)s_members(Visitor *v, %(c_name)s *obj, Error **errp)
}
''')
# 'goto out' produced for base, for each member, and if variants were
# present
if base or members or variants:
ret += mcgen('''
out:
''')
ret += mcgen('''
error_propagate(errp, err);
return !err;
}
''')
return ret
@ -129,15 +121,14 @@ out:
def gen_visit_list(name, element_type):
return mcgen('''
void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error **errp)
bool visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error **errp)
{
Error *err = NULL;
%(c_name)s *tail;
size_t size = sizeof(**obj);
visit_start_list(v, name, (GenericList **)obj, size, &err);
if (err) {
goto out;
if (!visit_start_list(v, name, (GenericList **)obj, size, errp)) {
return false;
}
for (tail = *obj; tail;
@ -156,8 +147,8 @@ void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error
qapi_free_%(c_name)s(*obj);
*obj = NULL;
}
out:
error_propagate(errp, err);
return !err;
}
''',
c_name=c_name(name), c_elt_type=element_type.c_name())
@ -166,11 +157,12 @@ out:
def gen_visit_enum(name):
return mcgen('''
void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s *obj, Error **errp)
bool visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s *obj, Error **errp)
{
int value = *obj;
visit_type_enum(v, name, &value, &%(c_name)s_lookup, errp);
bool ok = visit_type_enum(v, name, &value, &%(c_name)s_lookup, errp);
*obj = value;
return ok;
}
''',
c_name=c_name(name))
@ -179,14 +171,13 @@ void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s *obj, Error
def gen_visit_alternate(name, variants):
ret = mcgen('''
void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error **errp)
bool visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error **errp)
{
Error *err = NULL;
visit_start_alternate(v, name, (GenericAlternate **)obj, sizeof(**obj),
&err);
if (err) {
goto out;
if (!visit_start_alternate(v, name, (GenericAlternate **)obj,
sizeof(**obj), errp)) {
return false;
}
if (!*obj) {
/* incomplete */
@ -245,8 +236,8 @@ out_obj:
qapi_free_%(c_name)s(*obj);
*obj = NULL;
}
out:
error_propagate(errp, err);
return !err;
}
''',
name=name, c_name=c_name(name))
@ -257,13 +248,12 @@ out:
def gen_visit_object(name, base, members, variants):
return mcgen('''
void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error **errp)
bool visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error **errp)
{
Error *err = NULL;
visit_start_struct(v, name, (void **)obj, sizeof(%(c_name)s), &err);
if (err) {
goto out;
if (!visit_start_struct(v, name, (void **)obj, sizeof(%(c_name)s), errp)) {
return false;
}
if (!*obj) {
/* incomplete */
@ -281,8 +271,8 @@ out_obj:
qapi_free_%(c_name)s(*obj);
*obj = NULL;
}
out:
error_propagate(errp, err);
return !err;
}
''',
c_name=c_name(name))