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qom: centralize module-loading functionality

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Put together the common code of object_initialize() and
module_object_class_by_name() into a function that supports
Error **.  Rename the existing function type_get_by_name() to
clarify that it will only look at defined types; this is often
okay within object.c to look at the parents, but not outside it.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-10-29 10:31:30 +01:00
parent b801e3cb2a
commit 144d80f69e
1 changed files with 36 additions and 36 deletions
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72
qom/object.c
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@ -195,7 +195,7 @@ void type_register_static_array(const TypeInfo *infos, int nr_infos)
}
}
static TypeImpl *type_get_by_name(const char *name)
static TypeImpl *type_get_by_name_noload(const char *name)
{
if (name == NULL) {
return NULL;
@ -204,10 +204,32 @@ static TypeImpl *type_get_by_name(const char *name)
return type_table_lookup(name);
}
static TypeImpl *type_get_or_load_by_name(const char *name, Error **errp)
{
TypeImpl *type = type_get_by_name_noload(name);
#ifdef CONFIG_MODULES
if (!type) {
int rv = module_load_qom(name, errp);
if (rv > 0) {
type = type_get_by_name_noload(name);
} else {
error_prepend(errp, "could not load a module for type '%s'", name);
return NULL;
}
}
#endif
if (!type) {
error_setg(errp, "unknown type '%s'", name);
}
return type;
}
static TypeImpl *type_get_parent(TypeImpl *type)
{
if (!type->parent_type && type->parent) {
type->parent_type = type_get_by_name(type->parent);
type->parent_type = type_get_by_name_noload(type->parent);
if (!type->parent_type) {
fprintf(stderr, "Type '%s' is missing its parent '%s'\n",
type->name, type->parent);
@ -363,7 +385,7 @@ static void type_initialize(TypeImpl *ti)
}
for (i = 0; i < ti->num_interfaces; i++) {
TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
TypeImpl *t = type_get_by_name_noload(ti->interfaces[i].typename);
if (!t) {
error_report("missing interface '%s' for object '%s'",
ti->interfaces[i].typename, parent->name);
@ -557,23 +579,7 @@ static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type
void object_initialize(void *data, size_t size, const char *typename)
{
TypeImpl *type = type_get_by_name(typename);
#ifdef CONFIG_MODULES
if (!type) {
int rv = module_load_qom(typename, &error_fatal);
if (rv > 0) {
type = type_get_by_name(typename);
} else {
error_report("missing object type '%s'", typename);
exit(1);
}
}
#endif
if (!type) {
error_report("missing object type '%s'", typename);
abort();
}
TypeImpl *type = type_get_or_load_by_name(typename, &error_fatal);
object_initialize_with_type(data, size, type);
}
@ -784,7 +790,7 @@ Object *object_new_with_class(ObjectClass *klass)
Object *object_new(const char *typename)
{
TypeImpl *ti = type_get_by_name(typename);
TypeImpl *ti = type_get_by_name_noload(typename);
return object_new_with_type(ti);
}
@ -957,7 +963,7 @@ ObjectClass *object_class_dynamic_cast(ObjectClass *class,
return class;
}
target_type = type_get_by_name(typename);
target_type = type_get_by_name_noload(typename);
if (!target_type) {
/* target class type unknown, so fail the cast */
return NULL;
@ -1055,7 +1061,7 @@ const char *object_class_get_name(ObjectClass *klass)
ObjectClass *object_class_by_name(const char *typename)
{
TypeImpl *type = type_get_by_name(typename);
TypeImpl *type = type_get_by_name_noload(typename);
if (!type) {
return NULL;
@ -1068,21 +1074,15 @@ ObjectClass *object_class_by_name(const char *typename)
ObjectClass *module_object_class_by_name(const char *typename)
{
ObjectClass *oc;
TypeImpl *type = type_get_or_load_by_name(typename, NULL);
oc = object_class_by_name(typename);
#ifdef CONFIG_MODULES
if (!oc) {
Error *local_err = NULL;
int rv = module_load_qom(typename, &local_err);
if (rv > 0) {
oc = object_class_by_name(typename);
} else if (rv < 0) {
error_report_err(local_err);
if (!type) {
return NULL;
}
}
#endif
return oc;
type_initialize(type);
return type->class;
}
ObjectClass *object_class_get_parent(ObjectClass *class)