runtime/Protocol.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25         Protocol.h
  26         Copyright 1991-1996 NeXT Software, Inc.
  27 */
  28
  29 #ifndef _OBJC_PROTOCOL_H_
  30 #define _OBJC_PROTOCOL_H_
  31
  32 #import <objc/Object.h>
  33
  34 struct objc_method_description {
  35         SEL name;
  36         char *types;
  37 };
  38 struct objc_method_description_list {
  39         int count;
  40         struct objc_method_description list[1];
  41 };
  42
  43 @interface Protocol : Object
  44 {
  45 @private
  46         char *protocol_name;
  47         struct objc_protocol_list *protocol_list;
  48         struct objc_method_description_list *instance_methods, *class_methods;
  49 #ifdef NeXT_PDO /* hppa needs 8 byte aligned protocol blocks */
  50 #if defined(__hpux__) || defined(hpux)
  51         unsigned long   risc_pad;
  52 #endif /* __hpux__ || hpux */
  53 #endif NeXT_PDO
  54 }
  55
  56 /* Obtaining attributes intrinsic to the protocol */
  57
  58 - (const char *)name;
  59
  60 /* Testing protocol conformance */
  61
  62 - (BOOL) conformsTo: (Protocol *)aProtocolObject;
  63
  64 /* Looking up information specific to a protocol */
  65
  66 - (struct objc_method_description *) descriptionForInstanceMethod:(SEL)aSel;
  67 - (struct objc_method_description *) descriptionForClassMethod:(SEL)aSel;
  68
  69 @end
  70
  71 #endif /* _OBJC_PROTOCOL_H_ */