ObjFW  Diff

		unsigned long size;
		void (*copy_helper)(void *dest, void *src);
		void (*dispose_helper)(void *src);
		const char *signature;
	} *descriptor;
} of_block_literal_t;

typedef struct of_block_byref_t of_block_byref_t;
struct of_block_byref_t {
	Class isa;
	of_block_byref_t *forwarding;
	int flags;
	int size;
	void (*byref_keep)(void *dest, void *src);
	void (*byref_dispose)(void*);
};

enum {
	OF_BLOCK_HAS_COPY_DISPOSE = (1 << 25),
	OF_BLOCK_HAS_CTOR	  = (1 << 26),
	OF_BLOCK_IS_GLOBAL	  = (1 << 28),
	OF_BLOCK_HAS_STRET	  = (1 << 29),
	OF_BLOCK_HAS_SIGNATURE	  = (1 << 30),
};
#define OF_BLOCK_REFCOUNT_MASK \
	~(OF_BLOCK_HAS_COPY_DISPOSE | OF_BLOCK_HAS_CTOR | OF_BLOCK_IS_GLOBAL | \
	OF_BLOCK_HAS_STRET | OF_BLOCK_HAS_SIGNATURE)

enum {
	OF_BLOCK_FIELD_IS_OBJECT =   3,
	OF_BLOCK_FIELD_IS_BLOCK	 =   7,
	OF_BLOCK_FIELD_IS_BYREF	 =   8,
	OF_BLOCK_FIELD_IS_WEAK	 =  16,
	OF_BLOCK_BYREF_CALLER	 = 128,
};

#ifdef __cplusplus
extern "C" {
#endif
extern void* _Block_copy(const void*);
extern void _Block_release(const void*);
#ifdef __cplusplus
}