Mercurial > hg > xemacs-beta
annotate src/opaque.c @ 5518:3cc7470ea71c
gnuclient: if TMPDIR was set and connect failed, try again with /tmp
2011-06-03 Aidan Kehoe <kehoea@parhasard.net>
* gnuslib.c (connect_to_unix_server):
Retry with /tmp as a directory in which to search for Unix sockets
if an attempt to connect with some other directory failed (which
may be because gnuclient and gnuserv don't share an environment
value for TMPDIR, or because gnuserv was compiled with USE_TMPDIR
turned off).
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Fri, 03 Jun 2011 18:40:57 +0100 |
| parents | 308d34e9f07d |
| children | e2fae7783046 |
| rev | line source |
|---|---|
| 428 | 1 /* Opaque Lisp objects. |
| 2 Copyright (C) 1993, 1994, 1995 Sun Microsystems, Inc. | |
|
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3 Copyright (C) 1995, 1996, 2002, 2010 Ben Wing. |
| 428 | 4 |
| 5 This file is part of XEmacs. | |
| 6 | |
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7 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation, either version 3 of the License, or (at your |
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10 option) any later version. |
| 428 | 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 | |
|
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18 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 19 |
| 20 /* Synched up with: Not in FSF. */ | |
| 21 | |
| 22 /* Written by Ben Wing, October 1993. */ | |
| 23 | |
| 24 /* "Opaque" is used internally to hold keep track of allocated memory | |
| 25 so it gets GC'd properly, and to store arbitrary data in places | |
| 26 where a Lisp_Object is required and which may get GC'd. (e.g. as | |
| 27 the argument to record_unwind_protect()). Once created in C, | |
| 28 opaque objects cannot be resized. | |
| 29 | |
| 30 OPAQUE OBJECTS SHOULD NEVER ESCAPE TO THE LISP LEVEL. Some code | |
| 31 depends on this. As such, opaque objects are a generalization | |
| 32 of the Qunbound marker. | |
| 33 */ | |
| 34 | |
| 35 #include <config.h> | |
| 36 #include "lisp.h" | |
| 37 #include "opaque.h" | |
| 38 | |
| 3263 | 39 #ifndef NEW_GC |
| 428 | 40 Lisp_Object Vopaque_ptr_free_list; |
| 3263 | 41 #endif /* not NEW_GC */ |
| 428 | 42 |
| 43 /* Should never, ever be called. (except by an external debugger) */ | |
| 44 static void | |
| 2286 | 45 print_opaque (Lisp_Object obj, Lisp_Object printcharfun, |
| 46 int UNUSED (escapeflag)) | |
| 428 | 47 { |
| 442 | 48 const Lisp_Opaque *p = XOPAQUE (obj); |
| 428 | 49 |
| 800 | 50 write_fmt_string |
| 51 (printcharfun, | |
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52 "#<INTERNAL OBJECT (XEmacs bug?) (opaque, size=%lu) 0x%x>", |
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53 (long)(p->size), LISP_OBJECT_UID (obj)); |
| 428 | 54 } |
| 55 | |
| 665 | 56 inline static Bytecount |
| 57 aligned_sizeof_opaque (Bytecount opaque_size) | |
| 456 | 58 { |
| 826 | 59 return MAX_ALIGN_SIZE (offsetof (Lisp_Opaque, data) + opaque_size); |
| 456 | 60 } |
| 61 | |
| 665 | 62 static Bytecount |
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63 sizeof_opaque (Lisp_Object obj) |
| 428 | 64 { |
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65 return aligned_sizeof_opaque (XOPAQUE (obj)->size); |
| 428 | 66 } |
| 67 | |
| 68 /* Return an opaque object of size SIZE. | |
| 69 If DATA is OPAQUE_CLEAR, the object's data is memset to '\0' bytes. | |
| 70 If DATA is OPAQUE_UNINIT, the object's data is uninitialized. | |
| 71 Else the object's data is initialized by copying from DATA. */ | |
| 72 Lisp_Object | |
| 665 | 73 make_opaque (const void *data, Bytecount size) |
| 428 | 74 { |
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75 Lisp_Object obj = |
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76 ALLOC_SIZED_LISP_OBJECT (aligned_sizeof_opaque (size), opaque); |
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77 Lisp_Opaque *p = XOPAQUE (obj); |
| 428 | 78 p->size = size; |
| 79 | |
| 80 if (data == OPAQUE_CLEAR) | |
| 81 memset (p->data, '\0', size); | |
| 82 else if (data == OPAQUE_UNINIT) | |
| 83 DO_NOTHING; | |
| 84 else | |
| 85 memcpy (p->data, data, size); | |
| 86 | |
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87 return obj; |
| 428 | 88 } |
| 89 | |
| 90 /* This will not work correctly for opaques with subobjects! */ | |
| 91 | |
| 92 static int | |
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93 equal_opaque (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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94 int UNUSED (foldcase)) |
| 428 | 95 { |
| 665 | 96 Bytecount size; |
| 428 | 97 return ((size = XOPAQUE_SIZE (obj1)) == XOPAQUE_SIZE (obj2) && |
| 98 !memcmp (XOPAQUE_DATA (obj1), XOPAQUE_DATA (obj2), size)); | |
| 99 } | |
| 100 | |
| 101 /* This will not work correctly for opaques with subobjects! */ | |
| 102 | |
| 2515 | 103 static Hashcode |
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104 hash_opaque (Lisp_Object obj, int UNUSED (depth), int UNUSED (equalp)) |
| 428 | 105 { |
| 106 if (XOPAQUE_SIZE (obj) == sizeof (unsigned long)) | |
| 2515 | 107 return *((Hashcode *) XOPAQUE_DATA (obj)); |
| 428 | 108 else |
| 109 return memory_hash (XOPAQUE_DATA (obj), XOPAQUE_SIZE (obj)); | |
| 110 } | |
| 111 | |
| 1204 | 112 static const struct memory_description opaque_description[] = { |
| 428 | 113 { XD_END } |
| 114 }; | |
| 115 | |
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116 DEFINE_DUMPABLE_SIZABLE_LISP_OBJECT ("opaque", opaque, |
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117 0, print_opaque, 0, |
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118 equal_opaque, hash_opaque, |
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119 opaque_description, |
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120 sizeof_opaque, Lisp_Opaque); |
| 428 | 121 |
| 122 /* stuff to handle opaque pointers */ | |
| 123 | |
| 124 /* Should never, ever be called. (except by an external debugger) */ | |
| 125 static void | |
| 2286 | 126 print_opaque_ptr (Lisp_Object obj, Lisp_Object printcharfun, |
| 127 int UNUSED (escapeflag)) | |
| 428 | 128 { |
| 442 | 129 const Lisp_Opaque_Ptr *p = XOPAQUE_PTR (obj); |
| 428 | 130 |
| 800 | 131 write_fmt_string |
| 132 (printcharfun, | |
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133 "#<INTERNAL OBJECT (XEmacs bug?) (opaque-ptr, adr=0x%lx) 0x%x>", |
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134 (long)(p->ptr), LISP_OBJECT_UID (obj)); |
| 428 | 135 } |
| 136 | |
| 137 static int | |
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6ef8256a020a
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138 equal_opaque_ptr (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
3263
diff
changeset
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139 int UNUSED (foldcase)) |
| 428 | 140 { |
| 141 return (XOPAQUE_PTR (obj1)->ptr == XOPAQUE_PTR (obj2)->ptr); | |
| 142 } | |
| 143 | |
| 2515 | 144 static Hashcode |
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145 hash_opaque_ptr (Lisp_Object obj, int UNUSED (depth), int UNUSED (equalp)) |
| 428 | 146 { |
| 2515 | 147 return (Hashcode) XOPAQUE_PTR (obj)->ptr; |
| 428 | 148 } |
| 149 | |
| 1575 | 150 static const struct memory_description opaque_ptr_description[] = { |
| 151 { XD_END } | |
| 152 }; | |
| 153 | |
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154 DEFINE_NODUMP_LISP_OBJECT ("opaque-ptr", opaque_ptr, |
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155 0, print_opaque_ptr, 0, |
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156 equal_opaque_ptr, hash_opaque_ptr, |
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157 opaque_ptr_description, Lisp_Opaque_Ptr); |
| 428 | 158 |
| 159 Lisp_Object | |
| 160 make_opaque_ptr (void *val) | |
| 161 { | |
| 3263 | 162 #ifdef NEW_GC |
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163 Lisp_Object res = ALLOC_NORMAL_LISP_OBJECT (opaque_ptr); |
| 3263 | 164 #else /* not NEW_GC */ |
| 1204 | 165 Lisp_Object res = alloc_managed_lcrecord (Vopaque_ptr_free_list); |
| 3263 | 166 #endif /* not NEW_GC */ |
| 428 | 167 set_opaque_ptr (res, val); |
| 168 return res; | |
| 169 } | |
| 170 | |
| 171 /* Be very very careful with this. Same admonitions as with | |
| 172 free_cons() apply. */ | |
| 173 | |
| 174 void | |
| 175 free_opaque_ptr (Lisp_Object ptr) | |
| 176 { | |
| 3263 | 177 #ifdef NEW_GC |
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178 free_normal_lisp_object (ptr); |
| 3263 | 179 #else /* not NEW_GC */ |
| 428 | 180 free_managed_lcrecord (Vopaque_ptr_free_list, ptr); |
| 3263 | 181 #endif /* not NEW_GC */ |
| 428 | 182 } |
| 183 | |
| 3263 | 184 #ifndef NEW_GC |
| 428 | 185 void |
| 1204 | 186 reinit_opaque_early (void) |
| 428 | 187 { |
| 647 | 188 Vopaque_ptr_free_list = make_lcrecord_list (sizeof (Lisp_Opaque_Ptr), |
| 189 &lrecord_opaque_ptr); | |
| 428 | 190 staticpro_nodump (&Vopaque_ptr_free_list); |
| 191 } | |
| 3263 | 192 #endif /* not NEW_GC */ |
| 428 | 193 |
| 194 void | |
| 195 init_opaque_once_early (void) | |
| 196 { | |
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197 INIT_LISP_OBJECT (opaque); |
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198 INIT_LISP_OBJECT (opaque_ptr); |
| 442 | 199 |
| 3263 | 200 #ifndef NEW_GC |
| 1204 | 201 reinit_opaque_early (); |
| 3263 | 202 #endif /* not NEW_GC */ |
| 428 | 203 } |