libobjc/objc/deprecated/struct_objc_class.h

   1 /* This structure used to be public, but is now private to the runtime.  */
   2 #define __objc_STRUCT_OBJC_CLASS_defined
   3
   4 /*
   5 ** The compiler generates one of these structures for each class.
   6 **
   7 ** This structure is the definition for classes.
   8 **
   9 ** This structure is generated by the compiler in the executable and used by
  10 ** the run-time during normal messaging operations.  Therefore some members
  11 ** change type. The compiler generates "char* const" and places a string in
  12 ** the following member variables:  super_class.
  13 */
  14 struct objc_class {
  15   MetaClass           class_pointer;          /* Pointer to the class's
  16                                                 meta class. */
  17   struct objc_class*  super_class;            /* Pointer to the super
  18                                                 class. NULL for class
  19                                                 Object. */
  20   const char*         name;                   /* Name of the class. */
  21   long                version;                /* Unknown. */
  22   unsigned long       info;                   /* Bit mask.  See class masks
  23                                                 defined above. */
  24   long                instance_size;          /* Size in bytes of the class.
  25                                                 The sum of the class
  26                                                 definition and all super
  27                                                 class definitions. */
  28 #ifdef _WIN64
  29   /* We pad the structure manually to prevent warning when -Wpadded
  30      is used.  The compiler automatically pads the structures that it
  31      generates, so this manually padded structure still matches the one
  32      generated by the compiler, but if we don't pad manually, -Wpadded
  33      detects that padding is being added and generates annoying warnings.
  34      This hack is necessary as on LLP64 targets sizeof (long) isn't equal
  35      to sizeof (void *).  */
  36   long pad;
  37 #endif
  38   struct objc_ivar_list* ivars;               /* Pointer to a structure that
  39                                                 describes the instance
  40                                                 variables in the class
  41                                                 definition.  NULL indicates
  42                                                 no instance variables.  Does
  43                                                 not include super class
  44                                                 variables. */
  45   struct objc_method_list*  methods;          /* Linked list of instance
  46                                                 methods defined for the
  47                                                 class. */
  48   struct sarray *    dtable;                  /* Pointer to instance
  49                                                  method dispatch table. */
  50   struct objc_class* subclass_list;           /* Subclasses */
  51   struct objc_class* sibling_class;
  52
  53   struct objc_protocol_list *protocols;       /* Protocols conformed to */
  54   void* gc_object_type;
  55 };
  56