Mercurial > hg > xemacs-beta
annotate src/opaque.c @ 5022:cfe36e196dc7
long comment in syswindows.h about build constants
-------------------- ChangeLog entries follow: --------------------
src/ChangeLog addition:
2010-02-09 Ben Wing <ben@xemacs.org>
* syswindows.h:
Create a long comment about build flags such as WIN32_NATIVE,
HAVE_MS_WINDOWS.
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Tue, 09 Feb 2010 19:07:36 -0600 |
| parents | 6ef8256a020a |
| children | b5df3737028a |
| rev | line source |
|---|---|
| 428 | 1 /* Opaque Lisp objects. |
| 2 Copyright (C) 1993, 1994, 1995 Sun Microsystems, Inc. | |
| 800 | 3 Copyright (C) 1995, 1996, 2002 Ben Wing. |
| 428 | 4 |
| 5 This file is part of XEmacs. | |
| 6 | |
| 7 XEmacs is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2, or (at your option) any | |
| 10 later version. | |
| 11 | |
| 12 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with XEmacs; see the file COPYING. If not, write to | |
| 19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 20 Boston, MA 02111-1307, USA. */ | |
| 21 | |
| 22 /* Synched up with: Not in FSF. */ | |
| 23 | |
| 24 /* Written by Ben Wing, October 1993. */ | |
| 25 | |
| 26 /* "Opaque" is used internally to hold keep track of allocated memory | |
| 27 so it gets GC'd properly, and to store arbitrary data in places | |
| 28 where a Lisp_Object is required and which may get GC'd. (e.g. as | |
| 29 the argument to record_unwind_protect()). Once created in C, | |
| 30 opaque objects cannot be resized. | |
| 31 | |
| 32 OPAQUE OBJECTS SHOULD NEVER ESCAPE TO THE LISP LEVEL. Some code | |
| 33 depends on this. As such, opaque objects are a generalization | |
| 34 of the Qunbound marker. | |
| 35 */ | |
| 36 | |
| 37 #include <config.h> | |
| 38 #include "lisp.h" | |
| 39 #include "opaque.h" | |
| 40 | |
| 3263 | 41 #ifndef NEW_GC |
| 428 | 42 Lisp_Object Vopaque_ptr_free_list; |
| 3263 | 43 #endif /* not NEW_GC */ |
| 428 | 44 |
| 45 /* Should never, ever be called. (except by an external debugger) */ | |
| 46 static void | |
| 2286 | 47 print_opaque (Lisp_Object obj, Lisp_Object printcharfun, |
| 48 int UNUSED (escapeflag)) | |
| 428 | 49 { |
| 442 | 50 const Lisp_Opaque *p = XOPAQUE (obj); |
| 428 | 51 |
| 800 | 52 write_fmt_string |
| 53 (printcharfun, | |
| 54 "#<INTERNAL OBJECT (XEmacs bug?) (opaque, size=%lu) 0x%lx>", | |
| 55 (long)(p->size), (unsigned long) p); | |
| 428 | 56 } |
| 57 | |
| 665 | 58 inline static Bytecount |
| 59 aligned_sizeof_opaque (Bytecount opaque_size) | |
| 456 | 60 { |
| 826 | 61 return MAX_ALIGN_SIZE (offsetof (Lisp_Opaque, data) + opaque_size); |
| 456 | 62 } |
| 63 | |
| 665 | 64 static Bytecount |
| 442 | 65 sizeof_opaque (const void *header) |
| 428 | 66 { |
| 456 | 67 return aligned_sizeof_opaque (((const Lisp_Opaque *) header)->size); |
| 428 | 68 } |
| 69 | |
| 70 /* Return an opaque object of size SIZE. | |
| 71 If DATA is OPAQUE_CLEAR, the object's data is memset to '\0' bytes. | |
| 72 If DATA is OPAQUE_UNINIT, the object's data is uninitialized. | |
| 73 Else the object's data is initialized by copying from DATA. */ | |
| 74 Lisp_Object | |
| 665 | 75 make_opaque (const void *data, Bytecount size) |
| 428 | 76 { |
| 77 Lisp_Opaque *p = (Lisp_Opaque *) | |
| 3017 | 78 BASIC_ALLOC_LCRECORD (aligned_sizeof_opaque (size), &lrecord_opaque); |
| 428 | 79 p->size = size; |
| 80 | |
| 81 if (data == OPAQUE_CLEAR) | |
| 82 memset (p->data, '\0', size); | |
| 83 else if (data == OPAQUE_UNINIT) | |
| 84 DO_NOTHING; | |
| 85 else | |
| 86 memcpy (p->data, data, size); | |
| 87 | |
| 88 { | |
| 793 | 89 return wrap_opaque (p); |
| 428 | 90 } |
| 91 } | |
| 92 | |
| 93 /* This will not work correctly for opaques with subobjects! */ | |
| 94 | |
| 95 static int | |
|
4906
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
3263
diff
changeset
|
96 equal_opaque (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
|
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
3263
diff
changeset
|
97 int UNUSED (foldcase)) |
| 428 | 98 { |
| 665 | 99 Bytecount size; |
| 428 | 100 return ((size = XOPAQUE_SIZE (obj1)) == XOPAQUE_SIZE (obj2) && |
| 101 !memcmp (XOPAQUE_DATA (obj1), XOPAQUE_DATA (obj2), size)); | |
| 102 } | |
| 103 | |
| 104 /* This will not work correctly for opaques with subobjects! */ | |
| 105 | |
| 2515 | 106 static Hashcode |
| 2286 | 107 hash_opaque (Lisp_Object obj, int UNUSED (depth)) |
| 428 | 108 { |
| 109 if (XOPAQUE_SIZE (obj) == sizeof (unsigned long)) | |
| 2515 | 110 return *((Hashcode *) XOPAQUE_DATA (obj)); |
| 428 | 111 else |
| 112 return memory_hash (XOPAQUE_DATA (obj), XOPAQUE_SIZE (obj)); | |
| 113 } | |
| 114 | |
| 1204 | 115 static const struct memory_description opaque_description[] = { |
| 428 | 116 { XD_END } |
| 117 }; | |
| 118 | |
| 934 | 119 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("opaque", opaque, |
| 120 1, /*dumpable-flag*/ | |
| 121 0, print_opaque, 0, | |
| 122 equal_opaque, hash_opaque, | |
| 123 opaque_description, | |
| 124 sizeof_opaque, Lisp_Opaque); | |
| 428 | 125 |
| 126 /* stuff to handle opaque pointers */ | |
| 127 | |
| 128 /* Should never, ever be called. (except by an external debugger) */ | |
| 129 static void | |
| 2286 | 130 print_opaque_ptr (Lisp_Object obj, Lisp_Object printcharfun, |
| 131 int UNUSED (escapeflag)) | |
| 428 | 132 { |
| 442 | 133 const Lisp_Opaque_Ptr *p = XOPAQUE_PTR (obj); |
| 428 | 134 |
| 800 | 135 write_fmt_string |
| 136 (printcharfun, | |
| 137 "#<INTERNAL OBJECT (XEmacs bug?) (opaque-ptr, adr=0x%lx) 0x%lx>", | |
| 138 (long)(p->ptr), (unsigned long) p); | |
| 428 | 139 } |
| 140 | |
| 141 static int | |
|
4906
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
3263
diff
changeset
|
142 equal_opaque_ptr (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
|
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
3263
diff
changeset
|
143 int UNUSED (foldcase)) |
| 428 | 144 { |
| 145 return (XOPAQUE_PTR (obj1)->ptr == XOPAQUE_PTR (obj2)->ptr); | |
| 146 } | |
| 147 | |
| 2515 | 148 static Hashcode |
| 2286 | 149 hash_opaque_ptr (Lisp_Object obj, int UNUSED (depth)) |
| 428 | 150 { |
| 2515 | 151 return (Hashcode) XOPAQUE_PTR (obj)->ptr; |
| 428 | 152 } |
| 153 | |
| 1575 | 154 static const struct memory_description opaque_ptr_description[] = { |
| 155 { XD_END } | |
| 156 }; | |
| 157 | |
| 934 | 158 DEFINE_LRECORD_IMPLEMENTATION ("opaque-ptr", opaque_ptr, |
| 159 0, /*dumpable-flag*/ | |
| 160 0, print_opaque_ptr, 0, | |
| 1204 | 161 equal_opaque_ptr, hash_opaque_ptr, |
| 1575 | 162 opaque_ptr_description, Lisp_Opaque_Ptr); |
| 428 | 163 |
| 164 Lisp_Object | |
| 165 make_opaque_ptr (void *val) | |
| 166 { | |
| 3263 | 167 #ifdef NEW_GC |
| 2720 | 168 Lisp_Object res = |
| 169 wrap_pointer_1 (alloc_lrecord_type (Lisp_Opaque_Ptr, | |
| 170 &lrecord_opaque_ptr)); | |
| 3263 | 171 #else /* not NEW_GC */ |
| 1204 | 172 Lisp_Object res = alloc_managed_lcrecord (Vopaque_ptr_free_list); |
| 3263 | 173 #endif /* not NEW_GC */ |
| 428 | 174 set_opaque_ptr (res, val); |
| 175 return res; | |
| 176 } | |
| 177 | |
| 178 /* Be very very careful with this. Same admonitions as with | |
| 179 free_cons() apply. */ | |
| 180 | |
| 181 void | |
| 182 free_opaque_ptr (Lisp_Object ptr) | |
| 183 { | |
| 3263 | 184 #ifdef NEW_GC |
| 2720 | 185 free_lrecord (ptr); |
| 3263 | 186 #else /* not NEW_GC */ |
| 428 | 187 free_managed_lcrecord (Vopaque_ptr_free_list, ptr); |
| 3263 | 188 #endif /* not NEW_GC */ |
| 428 | 189 } |
| 190 | |
| 3263 | 191 #ifndef NEW_GC |
| 428 | 192 void |
| 1204 | 193 reinit_opaque_early (void) |
| 428 | 194 { |
| 647 | 195 Vopaque_ptr_free_list = make_lcrecord_list (sizeof (Lisp_Opaque_Ptr), |
| 196 &lrecord_opaque_ptr); | |
| 428 | 197 staticpro_nodump (&Vopaque_ptr_free_list); |
| 198 } | |
| 3263 | 199 #endif /* not NEW_GC */ |
| 428 | 200 |
| 201 void | |
| 202 init_opaque_once_early (void) | |
| 203 { | |
| 442 | 204 INIT_LRECORD_IMPLEMENTATION (opaque); |
| 205 INIT_LRECORD_IMPLEMENTATION (opaque_ptr); | |
| 206 | |
| 3263 | 207 #ifndef NEW_GC |
| 1204 | 208 reinit_opaque_early (); |
| 3263 | 209 #endif /* not NEW_GC */ |
| 428 | 210 } |