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https://github.com/darlinghq/darling-libobjc2.git
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65 lines
2.0 KiB
Objective-C
65 lines
2.0 KiB
Objective-C
#import <Foundation/NSObject.h>
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#import "objc/runtime.h"
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#import "objc/blocks_runtime.h"
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#include <assert.h>
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struct objc_class _NSConcreteGlobalBlock;
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struct objc_class _NSConcreteStackBlock;
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static struct objc_class _NSConcreteGlobalBlockMeta;
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static struct objc_class _NSConcreteStackBlockMeta;
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static struct objc_class _NSBlock;
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static struct objc_class _NSBlockMeta;
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@interface NSBlock : NSObject @end
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void __objc_update_dispatch_table_for_class(Class);
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extern struct sarray *__objc_uninstalled_dtable;
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extern objc_mutex_t __objc_runtime_mutex;
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static void createNSBlockSubclass(Class superclass, Class newClass,
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Class metaClass, char *name)
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{
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// Initialize the metaclass
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metaClass->class_pointer = superclass->class_pointer;
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metaClass->super_class = superclass->class_pointer;
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metaClass->info = _CLS_META;
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metaClass->dtable = __objc_uninstalled_dtable;
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// Set up the new class
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newClass->class_pointer = metaClass;
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newClass->super_class = superclass;
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newClass->name = name;
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newClass->info = _CLS_CLASS;
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newClass->dtable = __objc_uninstalled_dtable;
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// Initialize the dispatch table for the class and metaclass.
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__objc_update_dispatch_table_for_class(metaClass);
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__objc_update_dispatch_table_for_class(newClass);
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CLS_SETINITIALIZED(metaClass);
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CLS_SETINITIALIZED(newClass);
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CLS_SETRESOLV(metaClass);
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CLS_SETRESOLV(newClass);
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// Add pointer from super class
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objc_mutex_lock(__objc_runtime_mutex);
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newClass->sibling_class = newClass->super_class->subclass_list;
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newClass->super_class->subclass_list = newClass;
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metaClass->sibling_class = metaClass->super_class->subclass_list;
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metaClass->super_class->subclass_list = metaClass;
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objc_mutex_unlock(__objc_runtime_mutex);
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}
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#define NEW_CLASS(super, sub) \
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createNSBlockSubclass(super, &sub, &sub ## Meta, #sub)
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BOOL objc_create_block_classes_as_subclasses_of(Class super)
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{
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if (_NSBlock.super_class != NULL) { return NO; }
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NEW_CLASS(super, _NSBlock);
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NEW_CLASS(&_NSBlock, _NSConcreteStackBlock);
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NEW_CLASS(&_NSBlock, _NSConcreteGlobalBlock);
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return YES;
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}
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