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428
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1 /* The "lrecord" structure (header of a compound lisp object).
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2 Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
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3 Copyright (C) 1996 Ben Wing.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Not in FSF. */
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23
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440
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24 #ifndef INCLUDED_lrecord_h_
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25 #define INCLUDED_lrecord_h_
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428
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26
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27 /* The "lrecord" type of Lisp object is used for all object types
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28 other than a few simple ones. This allows many types to be
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442
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29 implemented but only a few bits required in a Lisp object for type
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30 information. (The tradeoff is that each object has its type marked
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31 in it, thereby increasing its size.) All lrecords begin with a
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32 `struct lrecord_header', which identifies the lisp object type, by
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33 providing an index into a table of `struct lrecord_implementation',
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34 which describes the behavior of the lisp object. It also contains
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35 some other data bits.
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428
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36
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37 Lrecords are of two types: straight lrecords, and lcrecords.
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38 Straight lrecords are used for those types of objects that have
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39 their own allocation routines (typically allocated out of 2K chunks
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40 of memory called `frob blocks'). These objects have a `struct
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41 lrecord_header' at the top, containing only the bits needed to find
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42 the lrecord_implementation for the object. There are special
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43 routines in alloc.c to deal with each such object type.
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44
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442
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45 Lcrecords are used for less common sorts of objects that don't do
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46 their own allocation. Each such object is malloc()ed individually,
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47 and the objects are chained together through a `next' pointer.
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48 Lcrecords have a `struct lcrecord_header' at the top, which
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49 contains a `struct lrecord_header' and a `next' pointer, and are
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50 allocated using alloc_lcrecord().
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428
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51
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52 Creating a new lcrecord type is fairly easy; just follow the
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53 lead of some existing type (e.g. hash tables). Note that you
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54 do not need to supply all the methods (see below); reasonable
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55 defaults are provided for many of them. Alternatively, if you're
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56 just looking for a way of encapsulating data (which possibly
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57 could contain Lisp_Objects in it), you may well be able to use
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58 the opaque type. */
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59
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60 struct lrecord_header
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61 {
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62 /* index into lrecord_implementations_table[] */
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442
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63 unsigned int type :8;
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64
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65 /* If `mark' is 0 after the GC mark phase, the object will be freed
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66 during the GC sweep phase. There are 2 ways that `mark' can be 1:
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67 - by being referenced from other objects during the GC mark phase
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68 - because it is permanently on, for c_readonly objects */
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69 unsigned int mark :1;
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70
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71 /* 1 if the object resides in logically read-only space, and does not
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72 reference other non-c_readonly objects.
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73 Invariant: if (c_readonly == 1), then (mark == 1 && lisp_readonly == 1) */
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74 unsigned int c_readonly :1;
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75
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428
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76 /* 1 if the object is readonly from lisp */
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442
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77 unsigned int lisp_readonly :1;
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428
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78 };
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79
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80 struct lrecord_implementation;
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442
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81 int lrecord_type_index (const struct lrecord_implementation *implementation);
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428
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82
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430
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83 #define set_lheader_implementation(header,imp) do { \
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428
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84 struct lrecord_header* SLI_header = (header); \
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442
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85 SLI_header->type = (imp)->lrecord_type_index; \
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430
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86 SLI_header->mark = 0; \
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87 SLI_header->c_readonly = 0; \
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88 SLI_header->lisp_readonly = 0; \
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428
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89 } while (0)
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90
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91 struct lcrecord_header
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92 {
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93 struct lrecord_header lheader;
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94
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442
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95 /* The `next' field is normally used to chain all lcrecords together
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428
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96 so that the GC can find (and free) all of them.
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442
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97 `alloc_lcrecord' threads lcrecords together.
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428
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98
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99 The `next' field may be used for other purposes as long as some
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100 other mechanism is provided for letting the GC do its work.
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101
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102 For example, the event and marker object types allocate members
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103 out of memory chunks, and are able to find all unmarked members
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104 by sweeping through the elements of the list of chunks. */
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105 struct lcrecord_header *next;
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106
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107 /* The `uid' field is just for debugging/printing convenience.
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108 Having this slot doesn't hurt us much spacewise, since an
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109 lcrecord already has the above slots plus malloc overhead. */
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110 unsigned int uid :31;
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111
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112 /* The `free' field is a flag that indicates whether this lcrecord
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113 is on a "free list". Free lists are used to minimize the number
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114 of calls to malloc() when we're repeatedly allocating and freeing
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115 a number of the same sort of lcrecord. Lcrecords on a free list
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116 always get marked in a different fashion, so we can use this flag
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117 as a sanity check to make sure that free lists only have freed
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118 lcrecords and there are no freed lcrecords elsewhere. */
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119 unsigned int free :1;
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120 };
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121
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122 /* Used for lcrecords in an lcrecord-list. */
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123 struct free_lcrecord_header
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124 {
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125 struct lcrecord_header lcheader;
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126 Lisp_Object chain;
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127 };
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128
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442
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129 enum lrecord_type
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130 {
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131 /* Symbol value magic types come first to make SYMBOL_VALUE_MAGIC_P fast.
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132 #### This should be replaced by a symbol_value_magic_p flag
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133 in the Lisp_Symbol lrecord_header. */
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134 lrecord_type_symbol_value_forward,
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135 lrecord_type_symbol_value_varalias,
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136 lrecord_type_symbol_value_lisp_magic,
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137 lrecord_type_symbol_value_buffer_local,
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138 lrecord_type_max_symbol_value_magic = lrecord_type_symbol_value_buffer_local,
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139
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140 lrecord_type_symbol,
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141 lrecord_type_subr,
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142 lrecord_type_cons,
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143 lrecord_type_vector,
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144 lrecord_type_string,
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145 lrecord_type_lcrecord_list,
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146 lrecord_type_compiled_function,
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147 lrecord_type_weak_list,
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148 lrecord_type_bit_vector,
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149 lrecord_type_float,
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150 lrecord_type_hash_table,
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151 lrecord_type_lstream,
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152 lrecord_type_process,
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153 lrecord_type_charset,
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154 lrecord_type_coding_system,
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155 lrecord_type_char_table,
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156 lrecord_type_char_table_entry,
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157 lrecord_type_range_table,
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158 lrecord_type_opaque,
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159 lrecord_type_opaque_ptr,
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160 lrecord_type_buffer,
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161 lrecord_type_extent,
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162 lrecord_type_extent_info,
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163 lrecord_type_extent_auxiliary,
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164 lrecord_type_marker,
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165 lrecord_type_event,
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166 lrecord_type_keymap,
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167 lrecord_type_command_builder,
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168 lrecord_type_timeout,
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169 lrecord_type_specifier,
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170 lrecord_type_console,
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171 lrecord_type_device,
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172 lrecord_type_frame,
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173 lrecord_type_window,
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174 lrecord_type_window_configuration,
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175 lrecord_type_gui_item,
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176 lrecord_type_popup_data,
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177 lrecord_type_toolbar_button,
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178 lrecord_type_color_instance,
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179 lrecord_type_font_instance,
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180 lrecord_type_image_instance,
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181 lrecord_type_glyph,
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182 lrecord_type_face,
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183 lrecord_type_database,
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184 lrecord_type_tooltalk_message,
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185 lrecord_type_tooltalk_pattern,
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186 lrecord_type_ldap,
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187 lrecord_type_pgconn,
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188 lrecord_type_pgresult,
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189 lrecord_type_devmode,
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190 lrecord_type_mswindows_dialog_id,
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446
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191 lrecord_type_case_table,
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462
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192 lrecord_type_emacs_ffi,
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193 lrecord_type_emacs_gtk_object,
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194 lrecord_type_emacs_gtk_boxed,
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454
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195 lrecord_type_free, /* only used for "free" lrecords */
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196 lrecord_type_undefined, /* only used for debugging */
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442
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197 lrecord_type_last_built_in_type /* must be last */
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198 };
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199
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200 extern unsigned int lrecord_type_count;
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428
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201
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202 struct lrecord_implementation
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203 {
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442
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204 const char *name;
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205
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206 /* `marker' is called at GC time, to make sure that all Lisp_Objects
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428
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207 pointed to by this object get properly marked. It should call
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208 the mark_object function on all Lisp_Objects in the object. If
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209 the return value is non-nil, it should be a Lisp_Object to be
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210 marked (don't call the mark_object function explicitly on it,
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211 because the GC routines will do this). Doing it this way reduces
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212 recursion, so the object returned should preferably be the one
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213 with the deepest level of Lisp_Object pointers. This function
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214 can be NULL, meaning no GC marking is necessary. */
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215 Lisp_Object (*marker) (Lisp_Object);
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442
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216
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217 /* `printer' converts the object to a printed representation.
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218 This can be NULL; in this case default_object_printer() will be
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219 used instead. */
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428
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220 void (*printer) (Lisp_Object, Lisp_Object printcharfun, int escapeflag);
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442
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221
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222 /* `finalizer' is called at GC time when the object is about to
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428
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223 be freed, and at dump time (FOR_DISKSAVE will be non-zero in this
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224 case). It should perform any necessary cleanup (e.g. freeing
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442
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225 malloc()ed memory). This can be NULL, meaning no special
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428
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226 finalization is necessary.
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227
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442
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228 WARNING: remember that `finalizer' is called at dump time even
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428
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229 though the object is not being freed. */
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230 void (*finalizer) (void *header, int for_disksave);
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442
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231
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428
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232 /* This can be NULL, meaning compare objects with EQ(). */
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233 int (*equal) (Lisp_Object obj1, Lisp_Object obj2, int depth);
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442
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234
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235 /* `hash' generates hash values for use with hash tables that have
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236 `equal' as their test function. This can be NULL, meaning use
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237 the Lisp_Object itself as the hash. But, you must still satisfy
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238 the constraint that if two objects are `equal', then they *must*
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239 hash to the same value in order for hash tables to work properly.
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240 This means that `hash' can be NULL only if the `equal' method is
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241 also NULL. */
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428
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242 unsigned long (*hash) (Lisp_Object, int);
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243
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244 /* External data layout description */
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245 const struct lrecord_description *description;
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246
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442
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247 /* These functions allow any object type to have builtin property
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248 lists that can be manipulated from the lisp level with
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249 `get', `put', `remprop', and `object-plist'. */
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428
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250 Lisp_Object (*getprop) (Lisp_Object obj, Lisp_Object prop);
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251 int (*putprop) (Lisp_Object obj, Lisp_Object prop, Lisp_Object val);
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252 int (*remprop) (Lisp_Object obj, Lisp_Object prop);
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253 Lisp_Object (*plist) (Lisp_Object obj);
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254
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442
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255 /* Only one of `static_size' and `size_in_bytes_method' is non-0.
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256 If both are 0, this type is not instantiable by alloc_lcrecord(). */
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428
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257 size_t static_size;
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442
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258 size_t (*size_in_bytes_method) (const void *header);
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259
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260 /* The (constant) index into lrecord_implementations_table */
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261 enum lrecord_type lrecord_type_index;
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262
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428
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263 /* A "basic" lrecord is any lrecord that's not an lcrecord, i.e.
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264 one that does not have an lcrecord_header at the front and which
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265 is (usually) allocated in frob blocks. We only use this flag for
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266 some consistency checking, and that only when error-checking is
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267 enabled. */
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442
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268 unsigned int basic_p :1;
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428
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269 };
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270
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442
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271 /* All the built-in lisp object types are enumerated in `enum record_type'.
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272 Additional ones may be defined by a module (none yet). We leave some
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273 room in `lrecord_implementations_table' for such new lisp object types. */
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274 #define MODULE_DEFINABLE_TYPE_COUNT 32
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275
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276 extern const struct lrecord_implementation *lrecord_implementations_table[(unsigned int)lrecord_type_last_built_in_type + MODULE_DEFINABLE_TYPE_COUNT];
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428
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277
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278 #define XRECORD_LHEADER_IMPLEMENTATION(obj) \
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442
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279 LHEADER_IMPLEMENTATION (XRECORD_LHEADER (obj))
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280 #define LHEADER_IMPLEMENTATION(lh) lrecord_implementations_table[(lh)->type]
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428
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281
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282 extern int gc_in_progress;
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283
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442
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284 #define MARKED_RECORD_P(obj) (XRECORD_LHEADER (obj)->mark)
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428
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285 #define MARKED_RECORD_HEADER_P(lheader) ((lheader)->mark)
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286 #define MARK_RECORD_HEADER(lheader) ((void) ((lheader)->mark = 1))
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287 #define UNMARK_RECORD_HEADER(lheader) ((void) ((lheader)->mark = 0))
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288
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289 #define C_READONLY_RECORD_HEADER_P(lheader) ((lheader)->c_readonly)
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290 #define LISP_READONLY_RECORD_HEADER_P(lheader) ((lheader)->lisp_readonly)
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442
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291 #define SET_C_READONLY_RECORD_HEADER(lheader) do { \
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292 struct lrecord_header *SCRRH_lheader = (lheader); \
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293 SCRRH_lheader->c_readonly = 1; \
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294 SCRRH_lheader->lisp_readonly = 1; \
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295 SCRRH_lheader->mark = 1; \
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296 } while (0)
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428
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297 #define SET_LISP_READONLY_RECORD_HEADER(lheader) \
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298 ((void) ((lheader)->lisp_readonly = 1))
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442
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299 #define RECORD_MARKER(lheader) lrecord_markers[(lheader)->type]
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428
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300
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301 /* External description stuff
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302
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303 A lrecord external description is an array of values. The first
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304 value of each line is a type, the second the offset in the lrecord
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305 structure. Following values are parameters, their presence, type
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442
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306 and number is type-dependent.
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428
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307
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308 The description ends with a "XD_END" or "XD_SPECIFIER_END" record.
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309
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310 Some example descriptions :
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440
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311
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428
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312 static const struct lrecord_description cons_description[] = {
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440
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313 { XD_LISP_OBJECT, offsetof (Lisp_Cons, car) },
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314 { XD_LISP_OBJECT, offsetof (Lisp_Cons, cdr) },
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428
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315 { XD_END }
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316 };
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317
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440
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318 Which means "two lisp objects starting at the 'car' and 'cdr' elements"
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428
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319
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320 static const struct lrecord_description string_description[] = {
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440
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321 { XD_BYTECOUNT, offsetof (Lisp_String, size) },
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322 { XD_OPAQUE_DATA_PTR, offsetof (Lisp_String, data), XD_INDIRECT(0, 1) },
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323 { XD_LISP_OBJECT, offsetof (Lisp_String, plist) },
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428
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324 { XD_END }
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325 };
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326 "A pointer to string data at 'data', the size of the pointed array being the value
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327 of the size variable plus 1, and one lisp object at 'plist'"
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328
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329 The existing types :
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330 XD_LISP_OBJECT
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440
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331 A Lisp object. This is also the type to use for pointers to other lrecords.
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428
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332
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440
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333 XD_LISP_OBJECT_ARRAY
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334 An array of Lisp objects or pointers to lrecords.
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335 The third element is the count.
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336
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428
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337 XD_LO_LINK
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338 Link in a linked list of objects of the same type.
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432
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339
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428
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340 XD_OPAQUE_PTR
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341 Pointer to undumpable data. Must be NULL when dumping.
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342
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343 XD_STRUCT_PTR
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344 Pointer to described struct. Parameters are number of structures and
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345 struct_description.
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346
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347 XD_OPAQUE_DATA_PTR
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348 Pointer to dumpable opaque data. Parameter is the size of the data.
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349 Pointed data must be relocatable without changes.
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350
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351 XD_C_STRING
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352 Pointer to a C string.
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353
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354 XD_DOC_STRING
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355 Pointer to a doc string (C string if positive, opaque value if negative)
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356
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357 XD_INT_RESET
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358 An integer which will be reset to a given value in the dump file.
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359
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360
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361 XD_SIZE_T
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|
|
362 size_t value. Used for counts.
|
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363
|
|
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364 XD_INT
|
|
|
365 int value. Used for counts.
|
|
|
366
|
|
|
367 XD_LONG
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|
|
368 long value. Used for counts.
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369
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370 XD_BYTECOUNT
|
|
|
371 bytecount value. Used for counts.
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372
|
|
|
373 XD_END
|
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|
374 Special type indicating the end of the array.
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375
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376 XD_SPECIFIER_END
|
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|
377 Special type indicating the end of the array for a specifier. Extra
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|
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378 description is going to be fetched from the specifier methods.
|
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379
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380
|
|
|
381 Special macros:
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|
|
382 XD_INDIRECT(line, delta)
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383 Usable where a "count" or "size" is requested. Gives the value of
|
|
|
384 the element which is at line number 'line' in the description (count
|
|
|
385 starts at zero) and adds delta to it.
|
|
|
386 */
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387
|
|
|
388 enum lrecord_description_type {
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|
440
|
389 XD_LISP_OBJECT_ARRAY,
|
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428
|
390 XD_LISP_OBJECT,
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|
391 XD_LO_LINK,
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|
|
392 XD_OPAQUE_PTR,
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|
393 XD_STRUCT_PTR,
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|
|
394 XD_OPAQUE_DATA_PTR,
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|
395 XD_C_STRING,
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|
|
396 XD_DOC_STRING,
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|
397 XD_INT_RESET,
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|
|
398 XD_SIZE_T,
|
|
|
399 XD_INT,
|
|
|
400 XD_LONG,
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|
|
401 XD_BYTECOUNT,
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|
|
402 XD_END,
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|
|
403 XD_SPECIFIER_END
|
|
|
404 };
|
|
|
405
|
|
|
406 struct lrecord_description {
|
|
|
407 enum lrecord_description_type type;
|
|
|
408 int offset;
|
|
|
409 EMACS_INT data1;
|
|
|
410 const struct struct_description *data2;
|
|
|
411 };
|
|
|
412
|
|
|
413 struct struct_description {
|
|
|
414 size_t size;
|
|
|
415 const struct lrecord_description *description;
|
|
|
416 };
|
|
|
417
|
|
|
418 #define XD_INDIRECT(val, delta) (-1-((val)|(delta<<8)))
|
|
|
419
|
|
|
420 #define XD_IS_INDIRECT(code) (code<0)
|
|
|
421 #define XD_INDIRECT_VAL(code) ((-1-code) & 255)
|
|
|
422 #define XD_INDIRECT_DELTA(code) (((-1-code)>>8) & 255)
|
|
|
423
|
|
|
424 #define XD_DYNARR_DESC(base_type, sub_desc) \
|
|
440
|
425 { XD_STRUCT_PTR, offsetof (base_type, base), XD_INDIRECT(1, 0), sub_desc }, \
|
|
|
426 { XD_INT, offsetof (base_type, cur) }, \
|
|
|
427 { XD_INT_RESET, offsetof (base_type, max), XD_INDIRECT(1, 0) }
|
|
428
|
428
|
|
|
429 /* DEFINE_LRECORD_IMPLEMENTATION is for objects with constant size.
|
|
|
430 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION is for objects whose size varies.
|
|
|
431 */
|
|
|
432
|
|
|
433 #if defined (ERROR_CHECK_TYPECHECK)
|
|
|
434 # define DECLARE_ERROR_CHECK_TYPECHECK(c_name, structtype)
|
|
|
435 #else
|
|
|
436 # define DECLARE_ERROR_CHECK_TYPECHECK(c_name, structtype)
|
|
|
437 #endif
|
|
|
438
|
|
|
439 #define DEFINE_BASIC_LRECORD_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,structtype) \
|
|
|
440 DEFINE_BASIC_LRECORD_IMPLEMENTATION_WITH_PROPS(name,c_name,marker,printer,nuker,equal,hash,desc,0,0,0,0,structtype)
|
|
|
441
|
|
442
|
442 #define DEFINE_BASIC_LRECORD_IMPLEMENTATION_WITH_PROPS(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,structtype) \
|
|
|
443 MAKE_LRECORD_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,sizeof(structtype),0,1,structtype)
|
|
428
|
444
|
|
|
445 #define DEFINE_LRECORD_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,structtype) \
|
|
|
446 DEFINE_LRECORD_IMPLEMENTATION_WITH_PROPS(name,c_name,marker,printer,nuker,equal,hash,desc,0,0,0,0,structtype)
|
|
|
447
|
|
442
|
448 #define DEFINE_LRECORD_IMPLEMENTATION_WITH_PROPS(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,structtype) \
|
|
|
449 MAKE_LRECORD_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,sizeof (structtype),0,0,structtype)
|
|
428
|
450
|
|
|
451 #define DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,sizer,structtype) \
|
|
|
452 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION_WITH_PROPS(name,c_name,marker,printer,nuker,equal,hash,desc,0,0,0,0,sizer,structtype)
|
|
|
453
|
|
442
|
454 #define DEFINE_BASIC_LRECORD_SEQUENCE_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,sizer,structtype) \
|
|
|
455 MAKE_LRECORD_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,0,0,0,0,0,sizer,1,structtype)
|
|
428
|
456
|
|
442
|
457 #define DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION_WITH_PROPS(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,sizer,structtype) \
|
|
|
458 MAKE_LRECORD_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,0,sizer,0,structtype) \
|
|
|
459
|
|
|
460 #define MAKE_LRECORD_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,size,sizer,basic_p,structtype) \
|
|
428
|
461 DECLARE_ERROR_CHECK_TYPECHECK(c_name, structtype) \
|
|
442
|
462 const struct lrecord_implementation lrecord_##c_name = \
|
|
428
|
463 { name, marker, printer, nuker, equal, hash, desc, \
|
|
442
|
464 getprop, putprop, remprop, plist, size, sizer, \
|
|
|
465 lrecord_type_##c_name, basic_p }
|
|
|
466
|
|
|
467 #define DEFINE_EXTERNAL_LRECORD_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,structtype) \
|
|
|
468 DEFINE_EXTERNAL_LRECORD_IMPLEMENTATION_WITH_PROPS(name,c_name,marker,printer,nuker,equal,hash,desc,0,0,0,0,structtype)
|
|
|
469
|
|
|
470 #define DEFINE_EXTERNAL_LRECORD_IMPLEMENTATION_WITH_PROPS(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,structtype) \
|
|
|
471 MAKE_EXTERNAL_LRECORD_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,sizeof (structtype),0,0,structtype)
|
|
|
472
|
|
|
473 #define DEFINE_EXTERNAL_LRECORD_SEQUENCE_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,sizer,structtype) \
|
|
|
474 DEFINE_EXTERNAL_LRECORD_SEQUENCE_IMPLEMENTATION_WITH_PROPS(name,c_name,marker,printer,nuker,equal,hash,desc,0,0,0,0,sizer,structtype)
|
|
|
475
|
|
|
476 #define DEFINE_EXTERNAL_LRECORD_SEQUENCE_IMPLEMENTATION_WITH_PROPS(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,sizer,structtype) \
|
|
|
477 MAKE_EXTERNAL_LRECORD_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,0,sizer,0,structtype)
|
|
|
478
|
|
|
479 #define MAKE_EXTERNAL_LRECORD_IMPLEMENTATION(name,c_name,marker,printer,nuker,equal,hash,desc,getprop,putprop,remprop,plist,size,sizer,basic_p,structtype) \
|
|
|
480 DECLARE_ERROR_CHECK_TYPECHECK(c_name, structtype) \
|
|
444
|
481 unsigned int lrecord_type_##c_name; \
|
|
|
482 struct lrecord_implementation lrecord_##c_name = \
|
|
442
|
483 { name, marker, printer, nuker, equal, hash, desc, \
|
|
|
484 getprop, putprop, remprop, plist, size, sizer, \
|
|
444
|
485 lrecord_type_last_built_in_type, basic_p }
|
|
442
|
486
|
|
|
487
|
|
|
488 extern Lisp_Object (*lrecord_markers[]) (Lisp_Object);
|
|
|
489
|
|
|
490 #define INIT_LRECORD_IMPLEMENTATION(type) do { \
|
|
|
491 lrecord_implementations_table[lrecord_type_##type] = &lrecord_##type; \
|
|
|
492 lrecord_markers[lrecord_type_##type] = \
|
|
|
493 lrecord_implementations_table[lrecord_type_##type]->marker; \
|
|
|
494 } while (0)
|
|
428
|
495
|
|
444
|
496 #define INIT_EXTERNAL_LRECORD_IMPLEMENTATION(type) do { \
|
|
|
497 lrecord_type_##type = lrecord_type_count++; \
|
|
|
498 lrecord_##type.lrecord_type_index = lrecord_type_##type; \
|
|
|
499 INIT_LRECORD_IMPLEMENTATION(type); \
|
|
|
500 } while (0)
|
|
|
501
|
|
428
|
502 #define LRECORDP(a) (XTYPE (a) == Lisp_Type_Record)
|
|
|
503 #define XRECORD_LHEADER(a) ((struct lrecord_header *) XPNTR (a))
|
|
|
504
|
|
|
505 #define RECORD_TYPEP(x, ty) \
|
|
442
|
506 (LRECORDP (x) && (((unsigned int)(XRECORD_LHEADER (x)->type)) == ((unsigned int)(ty))))
|
|
|
507
|
|
|
508 /* Steps to create a new object:
|
|
|
509
|
|
|
510 1. Declare the struct for your object in a header file somewhere.
|
|
|
511 Remember that it must begin with
|
|
|
512
|
|
|
513 struct lcrecord_header header;
|
|
|
514
|
|
|
515 2. Put a DECLARE_LRECORD() for the object below the struct definition,
|
|
|
516 along with the standard XFOO/XSETFOO junk.
|
|
|
517
|
|
|
518 3. Add this header file to inline.c.
|
|
|
519
|
|
|
520 4. Create the methods for your object. Note that technically you don't
|
|
|
521 need any, but you will almost always want at least a mark method.
|
|
|
522
|
|
|
523 5. Define your object with DEFINE_LRECORD_IMPLEMENTATION() or some
|
|
|
524 variant.
|
|
|
525
|
|
|
526 6. Include the header file in the .c file where you defined the object.
|
|
|
527
|
|
|
528 7. Put a call to INIT_LRECORD_IMPLEMENTATION() for the object in the
|
|
|
529 .c file's syms_of_foo() function.
|
|
|
530
|
|
|
531 8. Add a type enum for the object to enum lrecord_type, earlier in this
|
|
|
532 file.
|
|
|
533
|
|
|
534 An example:
|
|
428
|
535
|
|
442
|
536 ------------------------------ in toolbar.h -----------------------------
|
|
|
537
|
|
|
538 struct toolbar_button
|
|
|
539 {
|
|
|
540 struct lcrecord_header header;
|
|
|
541
|
|
|
542 Lisp_Object next;
|
|
|
543 Lisp_Object frame;
|
|
|
544
|
|
|
545 Lisp_Object up_glyph;
|
|
|
546 Lisp_Object down_glyph;
|
|
|
547 Lisp_Object disabled_glyph;
|
|
|
548
|
|
|
549 Lisp_Object cap_up_glyph;
|
|
|
550 Lisp_Object cap_down_glyph;
|
|
|
551 Lisp_Object cap_disabled_glyph;
|
|
|
552
|
|
|
553 Lisp_Object callback;
|
|
|
554 Lisp_Object enabled_p;
|
|
|
555 Lisp_Object help_string;
|
|
|
556
|
|
|
557 char enabled;
|
|
|
558 char down;
|
|
|
559 char pushright;
|
|
|
560 char blank;
|
|
|
561
|
|
|
562 int x, y;
|
|
|
563 int width, height;
|
|
|
564 int dirty;
|
|
|
565 int vertical;
|
|
|
566 int border_width;
|
|
|
567 };
|
|
428
|
568
|
|
442
|
569 DECLARE_LRECORD (toolbar_button, struct toolbar_button);
|
|
|
570 #define XTOOLBAR_BUTTON(x) XRECORD (x, toolbar_button, struct toolbar_button)
|
|
|
571 #define XSETTOOLBAR_BUTTON(x, p) XSETRECORD (x, p, toolbar_button)
|
|
|
572 #define TOOLBAR_BUTTONP(x) RECORDP (x, toolbar_button)
|
|
|
573 #define CHECK_TOOLBAR_BUTTON(x) CHECK_RECORD (x, toolbar_button)
|
|
|
574 #define CONCHECK_TOOLBAR_BUTTON(x) CONCHECK_RECORD (x, toolbar_button)
|
|
|
575
|
|
|
576 ------------------------------ in toolbar.c -----------------------------
|
|
|
577
|
|
|
578 #include "toolbar.h"
|
|
|
579
|
|
|
580 ...
|
|
|
581
|
|
|
582 static Lisp_Object
|
|
|
583 mark_toolbar_button (Lisp_Object obj)
|
|
|
584 {
|
|
|
585 struct toolbar_button *data = XTOOLBAR_BUTTON (obj);
|
|
|
586 mark_object (data->next);
|
|
|
587 mark_object (data->frame);
|
|
|
588 mark_object (data->up_glyph);
|
|
|
589 mark_object (data->down_glyph);
|
|
|
590 mark_object (data->disabled_glyph);
|
|
|
591 mark_object (data->cap_up_glyph);
|
|
|
592 mark_object (data->cap_down_glyph);
|
|
|
593 mark_object (data->cap_disabled_glyph);
|
|
|
594 mark_object (data->callback);
|
|
|
595 mark_object (data->enabled_p);
|
|
|
596 return data->help_string;
|
|
|
597 }
|
|
|
598
|
|
|
599 DEFINE_LRECORD_IMPLEMENTATION ("toolbar-button", toolbar_button,
|
|
|
600 mark_toolbar_button, 0, 0, 0, 0, 0,
|
|
|
601 struct toolbar_button);
|
|
|
602
|
|
|
603 ...
|
|
|
604
|
|
|
605 void
|
|
|
606 syms_of_toolbar (void)
|
|
|
607 {
|
|
|
608 INIT_LRECORD_IMPLEMENTATION (toolbar_button);
|
|
|
609
|
|
|
610 ...;
|
|
|
611 }
|
|
|
612
|
|
|
613 ------------------------------ in inline.c -----------------------------
|
|
|
614
|
|
|
615 #ifdef HAVE_TOOLBARS
|
|
|
616 #include "toolbar.h"
|
|
|
617 #endif
|
|
|
618
|
|
|
619 ------------------------------ in lrecord.h -----------------------------
|
|
|
620
|
|
|
621 enum lrecord_type
|
|
|
622 {
|
|
|
623 ...
|
|
|
624 lrecord_type_toolbar_button,
|
|
|
625 ...
|
|
|
626 };
|
|
|
627
|
|
|
628 */
|
|
|
629
|
|
|
630 /*
|
|
|
631
|
|
|
632 Note: Object types defined in external dynamically-loaded modules (not
|
|
|
633 part of the XEmacs main source code) should use DECLARE_EXTERNAL_LRECORD
|
|
|
634 and DEFINE_EXTERNAL_LRECORD_IMPLEMENTATION rather than DECLARE_LRECORD
|
|
|
635 and DEFINE_LRECORD_IMPLEMENTATION.
|
|
|
636
|
|
|
637 */
|
|
|
638
|
|
428
|
639
|
|
|
640 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
641
|
|
|
642 # define DECLARE_LRECORD(c_name, structtype) \
|
|
442
|
643 extern const struct lrecord_implementation lrecord_##c_name; \
|
|
|
644 INLINE_HEADER structtype * \
|
|
|
645 error_check_##c_name (Lisp_Object obj); \
|
|
|
646 INLINE_HEADER structtype * \
|
|
428
|
647 error_check_##c_name (Lisp_Object obj) \
|
|
|
648 { \
|
|
442
|
649 assert (RECORD_TYPEP (obj, lrecord_type_##c_name)); \
|
|
428
|
650 return (structtype *) XPNTR (obj); \
|
|
|
651 } \
|
|
|
652 extern Lisp_Object Q##c_name##p
|
|
|
653
|
|
442
|
654 # define DECLARE_EXTERNAL_LRECORD(c_name, structtype) \
|
|
|
655 extern unsigned int lrecord_type_##c_name; \
|
|
444
|
656 extern struct lrecord_implementation lrecord_##c_name; \
|
|
|
657 INLINE_HEADER structtype * \
|
|
|
658 error_check_##c_name (Lisp_Object obj); \
|
|
|
659 INLINE_HEADER structtype * \
|
|
|
660 error_check_##c_name (Lisp_Object obj) \
|
|
|
661 { \
|
|
|
662 assert (RECORD_TYPEP (obj, lrecord_type_##c_name)); \
|
|
|
663 return (structtype *) XPNTR (obj); \
|
|
|
664 } \
|
|
|
665 extern Lisp_Object Q##c_name##p
|
|
442
|
666
|
|
428
|
667 # define DECLARE_NONRECORD(c_name, type_enum, structtype) \
|
|
442
|
668 INLINE_HEADER structtype * \
|
|
|
669 error_check_##c_name (Lisp_Object obj); \
|
|
|
670 INLINE_HEADER structtype * \
|
|
428
|
671 error_check_##c_name (Lisp_Object obj) \
|
|
|
672 { \
|
|
|
673 assert (XTYPE (obj) == type_enum); \
|
|
|
674 return (structtype *) XPNTR (obj); \
|
|
|
675 } \
|
|
|
676 extern Lisp_Object Q##c_name##p
|
|
|
677
|
|
|
678 # define XRECORD(x, c_name, structtype) error_check_##c_name (x)
|
|
|
679 # define XNONRECORD(x, c_name, type_enum, structtype) error_check_##c_name (x)
|
|
|
680
|
|
|
681 # define XSETRECORD(var, p, c_name) do \
|
|
|
682 { \
|
|
442
|
683 XSETOBJ (var, p); \
|
|
|
684 assert (RECORD_TYPEP (var, lrecord_type_##c_name)); \
|
|
428
|
685 } while (0)
|
|
|
686
|
|
|
687 #else /* not ERROR_CHECK_TYPECHECK */
|
|
|
688
|
|
|
689 # define DECLARE_LRECORD(c_name, structtype) \
|
|
|
690 extern Lisp_Object Q##c_name##p; \
|
|
442
|
691 extern const struct lrecord_implementation lrecord_##c_name
|
|
|
692 # define DECLARE_EXTERNAL_LRECORD(c_name, structtype) \
|
|
|
693 extern Lisp_Object Q##c_name##p; \
|
|
|
694 extern unsigned int lrecord_type_##c_name; \
|
|
444
|
695 extern struct lrecord_implementation lrecord_##c_name
|
|
428
|
696 # define DECLARE_NONRECORD(c_name, type_enum, structtype) \
|
|
|
697 extern Lisp_Object Q##c_name##p
|
|
|
698 # define XRECORD(x, c_name, structtype) ((structtype *) XPNTR (x))
|
|
|
699 # define XNONRECORD(x, c_name, type_enum, structtype) \
|
|
|
700 ((structtype *) XPNTR (x))
|
|
442
|
701 # define XSETRECORD(var, p, c_name) XSETOBJ (var, p)
|
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428
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702
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703 #endif /* not ERROR_CHECK_TYPECHECK */
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|
704
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442
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705 #define RECORDP(x, c_name) RECORD_TYPEP (x, lrecord_type_##c_name)
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|
428
|
706
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|
707 /* Note: we now have two different kinds of type-checking macros.
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|
708 The "old" kind has now been renamed CONCHECK_foo. The reason for
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709 this is that the CONCHECK_foo macros signal a continuable error,
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710 allowing the user (through debug-on-error) to substitute a different
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|
711 value and return from the signal, which causes the lvalue argument
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712 to get changed. Quite a lot of code would crash if that happened,
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|
713 because it did things like
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714
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715 foo = XCAR (list);
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|
716 CHECK_STRING (foo);
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|
717
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718 and later on did XSTRING (XCAR (list)), assuming that the type
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|
719 is correct (when it might be wrong, if the user substituted a
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720 correct value in the debugger).
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721
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722 To get around this, I made all the CHECK_foo macros signal a
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723 non-continuable error. Places where a continuable error is OK
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|
724 (generally only when called directly on the argument of a Lisp
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725 primitive) should be changed to use CONCHECK().
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|
726
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727 FSF Emacs does not have this problem because RMS took the cheesy
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|
728 way out and disabled returning from a signal entirely. */
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|
|
729
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730 #define CONCHECK_RECORD(x, c_name) do { \
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442
|
731 if (!RECORD_TYPEP (x, lrecord_type_##c_name)) \
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428
|
732 x = wrong_type_argument (Q##c_name##p, x); \
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|
|
733 } while (0)
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734 #define CONCHECK_NONRECORD(x, lisp_enum, predicate) do {\
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|
735 if (XTYPE (x) != lisp_enum) \
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|
736 x = wrong_type_argument (predicate, x); \
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|
737 } while (0)
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|
|
738 #define CHECK_RECORD(x, c_name) do { \
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|
442
|
739 if (!RECORD_TYPEP (x, lrecord_type_##c_name)) \
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|
428
|
740 dead_wrong_type_argument (Q##c_name##p, x); \
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|
|
741 } while (0)
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|
|
742 #define CHECK_NONRECORD(x, lisp_enum, predicate) do { \
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|
|
743 if (XTYPE (x) != lisp_enum) \
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|
|
744 dead_wrong_type_argument (predicate, x); \
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|
|
745 } while (0)
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|
|
746
|
|
442
|
747 void *alloc_lcrecord (size_t size, const struct lrecord_implementation *);
|
|
428
|
748
|
|
|
749 #define alloc_lcrecord_type(type, lrecord_implementation) \
|
|
|
750 ((type *) alloc_lcrecord (sizeof (type), lrecord_implementation))
|
|
|
751
|
|
|
752 /* Copy the data from one lcrecord structure into another, but don't
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|
|
753 overwrite the header information. */
|
|
|
754
|
|
|
755 #define copy_lcrecord(dst, src) \
|
|
430
|
756 memcpy ((char *) (dst) + sizeof (struct lcrecord_header), \
|
|
|
757 (char *) (src) + sizeof (struct lcrecord_header), \
|
|
|
758 sizeof (*(dst)) - sizeof (struct lcrecord_header))
|
|
428
|
759
|
|
|
760 #define zero_lcrecord(lcr) \
|
|
430
|
761 memset ((char *) (lcr) + sizeof (struct lcrecord_header), 0, \
|
|
|
762 sizeof (*(lcr)) - sizeof (struct lcrecord_header))
|
|
428
|
763
|
|
440
|
764 #endif /* INCLUDED_lrecord_h_ */
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