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//
// CTBlockDescription.h
// CTBlockDescription
//
// Created by Oliver Letterer on 01.09.12.
// Copyright (c) 2012 olettere. All rights reserved.
//
struct CTBlockLiteral {
void *isa; // initialized to &_NSConcreteStackBlock or &_NSConcreteGlobalBlock
int flags;
int reserved;
void (*invoke)(void *, ...);
struct block_descriptor {
unsigned long int reserved; // NULL
unsigned long int size; // sizeof(struct Block_literal_1)
// optional helper functions
void (*copy_helper)(void *dst, void *src); // IFF (1<<25)
void (*dispose_helper)(void *src); // IFF (1<<25)
// required ABI.2010.3.16
const char *signature; // IFF (1<<30)
} *descriptor;
// imported variables
};
enum {
CTBlockDescriptionFlagsHasCopyDispose = (1 << 25),
CTBlockDescriptionFlagsHasCtor = (1 << 26), // helpers have C++ code
CTBlockDescriptionFlagsIsGlobal = (1 << 28),
CTBlockDescriptionFlagsHasStret = (1 << 29), // IFF BLOCK_HAS_SIGNATURE
CTBlockDescriptionFlagsHasSignature = (1 << 30)
};
typedef int CTBlockDescriptionFlags;
@interface CTBlockDescription : NSObject
@property (nonatomic, readonly) CTBlockDescriptionFlags flags;
@property (nonatomic, readonly) NSMethodSignature *blockSignature;
@property (nonatomic, readonly) unsigned long int size;
@property (nonatomic, readonly) id block;
- (id)initWithBlock:(id)block;
- (BOOL)isCompatibleForBlockSwizzlingWithMethodSignature:(NSMethodSignature *)methodSignature;
@end
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