runtime/Accessors.subproj/objc-accessors-table.h

   1 /*
   2  * Copyright (c) 2006 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /* Support for optimized accessor methods. Currently optimized accessor methods are provided for ivar offsets from 0 to 64. */
  25
  26 #define ALWAYS_USE_C_ACCESSOR_METHODS 0
  27
  28 // set of property getters for specific offsets.
  29 #define GETPROPERTY_OFFSET(offset) _objc_getProperty_offset_ ## offset
  30 #define DECLARE_GETPROPERTY_OFFSET(offset) extern id GETPROPERTY_OFFSET(offset)(id self, SEL _cmd)
  31 #define IMPLEMENT_GETPROPERTY_OFFSET(offset) static id GETPROPERTY_OFFSET(offset)(id self, SEL _cmd) { return *(id*)((char*)self + offset); }
  32
  33 #if ALWAYS_USE_C_ACCESSOR_METHODS || defined(__ppc__) || defined(__ppc64__) || defined(__x86_64__)
  34 // C versions with hard-coded offsets. may be good enough in most cases.
  35 IMPLEMENT_GETPROPERTY_OFFSET(0)
  36 IMPLEMENT_GETPROPERTY_OFFSET(4)
  37 IMPLEMENT_GETPROPERTY_OFFSET(8)
  38 IMPLEMENT_GETPROPERTY_OFFSET(12)
  39 IMPLEMENT_GETPROPERTY_OFFSET(16)
  40 IMPLEMENT_GETPROPERTY_OFFSET(20)
  41 IMPLEMENT_GETPROPERTY_OFFSET(24)
  42 IMPLEMENT_GETPROPERTY_OFFSET(28)
  43 IMPLEMENT_GETPROPERTY_OFFSET(32)
  44 IMPLEMENT_GETPROPERTY_OFFSET(36)
  45 IMPLEMENT_GETPROPERTY_OFFSET(40)
  46 IMPLEMENT_GETPROPERTY_OFFSET(44)
  47 IMPLEMENT_GETPROPERTY_OFFSET(48)
  48 IMPLEMENT_GETPROPERTY_OFFSET(52)
  49 IMPLEMENT_GETPROPERTY_OFFSET(56)
  50 IMPLEMENT_GETPROPERTY_OFFSET(60)
  51 IMPLEMENT_GETPROPERTY_OFFSET(64)
  52 #else
  53 // forward delcarations to assembly versions. only on i386 right now.
  54 DECLARE_GETPROPERTY_OFFSET(0);
  55 DECLARE_GETPROPERTY_OFFSET(4);
  56 DECLARE_GETPROPERTY_OFFSET(8);
  57 DECLARE_GETPROPERTY_OFFSET(12);
  58 DECLARE_GETPROPERTY_OFFSET(16);
  59 DECLARE_GETPROPERTY_OFFSET(20);
  60 DECLARE_GETPROPERTY_OFFSET(24);
  61 DECLARE_GETPROPERTY_OFFSET(28);
  62 DECLARE_GETPROPERTY_OFFSET(32);
  63 DECLARE_GETPROPERTY_OFFSET(36);
  64 DECLARE_GETPROPERTY_OFFSET(40);
  65 DECLARE_GETPROPERTY_OFFSET(44);
  66 DECLARE_GETPROPERTY_OFFSET(48);
  67 DECLARE_GETPROPERTY_OFFSET(52);
  68 DECLARE_GETPROPERTY_OFFSET(56);
  69 DECLARE_GETPROPERTY_OFFSET(60);
  70 DECLARE_GETPROPERTY_OFFSET(64);
  71 #endif
  72
  73 static void* _getProperty_offset_table[] = {
  74     GETPROPERTY_OFFSET(0),
  75     GETPROPERTY_OFFSET(4),
  76     GETPROPERTY_OFFSET(8),
  77     GETPROPERTY_OFFSET(12),
  78     GETPROPERTY_OFFSET(16),
  79     GETPROPERTY_OFFSET(20),
  80     GETPROPERTY_OFFSET(24),
  81     GETPROPERTY_OFFSET(28),
  82     GETPROPERTY_OFFSET(32),
  83     GETPROPERTY_OFFSET(36),
  84     GETPROPERTY_OFFSET(40),
  85     GETPROPERTY_OFFSET(44),
  86     GETPROPERTY_OFFSET(48),
  87     GETPROPERTY_OFFSET(52),
  88     GETPROPERTY_OFFSET(56),
  89     GETPROPERTY_OFFSET(60),
  90     GETPROPERTY_OFFSET(64),
  91 };
  92
  93 #undef GETPROPERTY_OFFSET
  94 #undef DECLARE_GETPROPERTY_OFFSET
  95 #undef IMPLEMENT_GETPROPERTY_OFFSET
  96 #define GETPROPERTY_IMP(offset) ((offset <= 64) ? (IMP)_getProperty_offset_table[offset >> 2] : NULL)
  97
  98 // set of property setters for specific offsets.
  99 #define SETPROPERTY_OFFSET(offset) _objc_setProperty_offset_ ## offset
 100 #define DECLARE_SETPROPERTY_OFFSET(offset) extern id SETPROPERTY_OFFSET(offset)(id self, SEL _cmd, ...)
 101 #define IMPLEMENT_SETPROPERTY_OFFSET(offset) __private_extern__ void SETPROPERTY_OFFSET(offset)(id self, SEL _cmd, id value) { objc_assign_ivar_gc(value, self, offset); }
 102
 103 #if ALWAYS_USE_C_ACCESSOR_METHODS || !defined(__i386__)
 104 // C versions with hard-coded offsets. may be good enough in most cases.
 105 IMPLEMENT_SETPROPERTY_OFFSET(0)
 106 IMPLEMENT_SETPROPERTY_OFFSET(4)
 107 IMPLEMENT_SETPROPERTY_OFFSET(8)
 108 IMPLEMENT_SETPROPERTY_OFFSET(12)
 109 IMPLEMENT_SETPROPERTY_OFFSET(16)
 110 IMPLEMENT_SETPROPERTY_OFFSET(20)
 111 IMPLEMENT_SETPROPERTY_OFFSET(24)
 112 IMPLEMENT_SETPROPERTY_OFFSET(28)
 113 IMPLEMENT_SETPROPERTY_OFFSET(32)
 114 IMPLEMENT_SETPROPERTY_OFFSET(36)
 115 IMPLEMENT_SETPROPERTY_OFFSET(40)
 116 IMPLEMENT_SETPROPERTY_OFFSET(44)
 117 IMPLEMENT_SETPROPERTY_OFFSET(48)
 118 IMPLEMENT_SETPROPERTY_OFFSET(52)
 119 IMPLEMENT_SETPROPERTY_OFFSET(56)
 120 IMPLEMENT_SETPROPERTY_OFFSET(60)
 121 IMPLEMENT_SETPROPERTY_OFFSET(64)
 122 #else
 123 // forward delcarations to assembly versions. only on i386 right now.
 124 DECLARE_SETPROPERTY_OFFSET(0);
 125 DECLARE_SETPROPERTY_OFFSET(4);
 126 DECLARE_SETPROPERTY_OFFSET(8);
 127 DECLARE_SETPROPERTY_OFFSET(12);
 128 DECLARE_SETPROPERTY_OFFSET(16);
 129 DECLARE_SETPROPERTY_OFFSET(20);
 130 DECLARE_SETPROPERTY_OFFSET(24);
 131 DECLARE_SETPROPERTY_OFFSET(28);
 132 DECLARE_SETPROPERTY_OFFSET(32);
 133 DECLARE_SETPROPERTY_OFFSET(36);
 134 DECLARE_SETPROPERTY_OFFSET(40);
 135 DECLARE_SETPROPERTY_OFFSET(44);
 136 DECLARE_SETPROPERTY_OFFSET(48);
 137 DECLARE_SETPROPERTY_OFFSET(52);
 138 DECLARE_SETPROPERTY_OFFSET(56);
 139 DECLARE_SETPROPERTY_OFFSET(60);
 140 DECLARE_SETPROPERTY_OFFSET(64);
 141 #endif
 142
 143 static void* _setProperty_offset_table[] = {
 144     SETPROPERTY_OFFSET(0),
 145     SETPROPERTY_OFFSET(4),
 146     SETPROPERTY_OFFSET(8),
 147     SETPROPERTY_OFFSET(12),
 148     SETPROPERTY_OFFSET(16),
 149     SETPROPERTY_OFFSET(20),
 150     SETPROPERTY_OFFSET(24),
 151     SETPROPERTY_OFFSET(28),
 152     SETPROPERTY_OFFSET(32),
 153     SETPROPERTY_OFFSET(36),
 154     SETPROPERTY_OFFSET(40),
 155     SETPROPERTY_OFFSET(44),
 156     SETPROPERTY_OFFSET(48),
 157     SETPROPERTY_OFFSET(52),
 158     SETPROPERTY_OFFSET(56),
 159     SETPROPERTY_OFFSET(60),
 160     SETPROPERTY_OFFSET(64),
 161 };
 162
 163 #undef SETPROPERTY_OFFSET
 164 #undef DECLARE_SETPROPERTY_OFFSET
 165 #undef IMPLEMENT_SETPROPERTY_OFFSET
 166 #define SETPROPERTY_IMP(offset) ((offset <= 64) ? (IMP)_setProperty_offset_table[offset >> 2] : NULL)