/**
* Checks whether the class implements memory management methods, and whether
* they are safe to use with ARC.
*/
static void checkARCAccessors(Class cls)
{
static SEL retain, release, autorelease, isARC;
if (NULL == retain)
{
retain = sel_registerName("retain");
release = sel_registerName("release");
autorelease = sel_registerName("autorelease");
isARC = sel_registerName("_ARCCompliantRetainRelease");
}
struct objc_slot *slot = objc_get_slot(cls, retain);
if ((NULL != slot) && !ownsMethod(slot->owner, isARC))
{
objc_clear_class_flag(cls, objc_class_flag_fast_arc);
return;
}
slot = objc_get_slot(cls, release);
if ((NULL != slot) && !ownsMethod(slot->owner, isARC))
{
objc_clear_class_flag(cls, objc_class_flag_fast_arc);
return;
}
slot = objc_get_slot(cls, autorelease);
if ((NULL != slot) && !ownsMethod(slot->owner, isARC))
{
objc_clear_class_flag(cls, objc_class_flag_fast_arc);
return;
}
objc_set_class_flag(cls, objc_class_flag_fast_arc);
}
/*
* Checks whether the class implements memory management methods, and whether
* they are safe to use with ARC.
*/
static void checkARCAccessors(Class cls)
{
if (!ownsMethod(cls, objc_is_arc_compatible_selector)){
/*
* The class doesn't implement the isARC selector, which means
* we need to check if it implements custom ARR methods.
*/
if (_objc_check_class_for_custom_arr_method(cls, objc_retain_selector)){
return;
}
if (_objc_check_class_for_custom_arr_method(cls, objc_release_selector)){
return;
}
if (_objc_check_class_for_custom_arr_method(cls, objc_autorelease_selector)){
return;
}
}
cls->flags.has_custom_arr = NO;
}
