aboutsummaryrefslogtreecommitdiff
path: root/include/qom
diff options
context:
space:
mode:
authorIgor Mammedov <imammedo@redhat.com>2017-10-09 21:50:50 +0200
committerDavid Gibson <david@gibson.dropbear.id.au>2017-10-17 10:34:00 +1100
commit38b5d79b2e8cf6085324066d84e8bb3b3bbe8548 (patch)
tree97b9f23f52fd0290d230cec1197a55057c1e19f1 /include/qom
parentaa04c9d20704fa5b9ab239d5111adbcce5f49808 (diff)
qom: add helper macro DEFINE_TYPES()
DEFINE_TYPES() will help to simplify following routine patterns: static void foo_register_types(void) { type_register_static(&foo1_type_info); type_register_static(&foo2_type_info); ... } type_init(foo_register_types) or static void foo_register_types(void) { int i; for (i = 0; i < ARRAY_SIZE(type_infos); i++) { type_register_static(&type_infos[i]); } } type_init(foo_register_types) with a single line DEFINE_TYPES(type_infos) where types have static definition which could be consolidated in a single array of TypeInfo structures. It saves us ~6-10LOC per use case and would help to replace imperative foo_register_types() there with declarative style of type registration. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'include/qom')
-rw-r--r--include/qom/object.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/include/qom/object.h b/include/qom/object.h
index 9a2369c67b..dc73d59660 100644
--- a/include/qom/object.h
+++ b/include/qom/object.h
@@ -79,6 +79,28 @@ typedef struct InterfaceInfo InterfaceInfo;
* #TypeInfo describes information about the type including what it inherits
* from, the instance and class size, and constructor/destructor hooks.
*
+ * Alternatively several static types could be registered using helper macro
+ * DEFINE_TYPES()
+ *
+ * <example>
+ * <programlisting>
+ * static const TypeInfo device_types_info[] = {
+ * {
+ * .name = TYPE_MY_DEVICE_A,
+ * .parent = TYPE_DEVICE,
+ * .instance_size = sizeof(MyDeviceA),
+ * },
+ * {
+ * .name = TYPE_MY_DEVICE_B,
+ * .parent = TYPE_DEVICE,
+ * .instance_size = sizeof(MyDeviceB),
+ * },
+ * };
+ *
+ * DEFINE_TYPES(device_types_info)
+ * </programlisting>
+ * </example>
+ *
* Every type has an #ObjectClass associated with it. #ObjectClass derivatives
* are instantiated dynamically but there is only ever one instance for any
* given type. The #ObjectClass typically holds a table of function pointers
@@ -799,6 +821,20 @@ Type type_register(const TypeInfo *info);
void type_register_static_array(const TypeInfo *infos, int nr_infos);
/**
+ * DEFINE_TYPES:
+ * @type_array: The array containing #TypeInfo structures to register
+ *
+ * @type_array should be static constant that exists for the life time
+ * that the type is registered.
+ */
+#define DEFINE_TYPES(type_array) \
+static void do_qemu_init_ ## type_array(void) \
+{ \
+ type_register_static_array(type_array, ARRAY_SIZE(type_array)); \
+} \
+type_init(do_qemu_init_ ## type_array)
+
+/**
* object_class_dynamic_cast_assert:
* @klass: The #ObjectClass to attempt to cast.
* @typename: The QOM typename of the class to cast to.