annotate src/emodules.c @ 851:e7ee5f8bde58

[xemacs-hg @ 2002-05-23 11:46:08 by ben] fix for raymond toy's crash, alloca crashes, some recover-session improvements files.el: Recover-session improvements: Only show session files where some files can actually be recovered, and show in chronological order. subr.el, menubar-items.el: As promised to rms, the functionality in truncate-string-with-continuation-dots has been merged into truncate-string-to-width. Change callers in menubar-items.el. select.el: Document some of these funs better. Fix problem where we were doing own-clipboard twice. Makefile.in.in: Add alloca.o. Ensure that alloca.s doesn't compile into alloca.o, but allocax.o (not that it's currently used or anything.) EmacsFrame.c, abbrev.c, alloc.c, alloca.c, callint.c, callproc.c, config.h.in, device-msw.c, device-x.c, dired.c, doc.c, editfns.c, emacs.c, emodules.c, eval.c, event-Xt.c, event-msw.c, event-stream.c, file-coding.c, fileio.c, filelock.c, fns.c, glyphs-gtk.c, glyphs-msw.c, glyphs-x.c, gui-x.c, input-method-xlib.c, intl-win32.c, lisp.h, lread.c, menubar-gtk.c, menubar-msw.c, menubar.c, mule-wnnfns.c, nt.c, objects-msw.c, process-nt.c, realpath.c, redisplay-gtk.c, redisplay-output.c, redisplay-x.c, redisplay.c, search.c, select-msw.c, sysdep.c, syswindows.h, text.c, text.h, ui-byhand.c: Fix Raymond Toy's crash. Repeat to self: 2^21 - 1 is NOT the same as (2 << 21) - 1. Fix crashes due to excessive alloca(). replace alloca() with ALLOCA(), which calls the C alloca() [which uses xmalloc()] when the size is too big. Insert in various places calls to try to flush the C alloca() stored info if there is any. Add MALLOC_OR_ALLOCA(), for places that expect to be alloca()ing large blocks. This xmalloc()s when too large and records an unwind-protect to free -- relying on the caller to unbind_to() elsewhere in the function. Use it in concat(). Use MALLOC instead of ALLOCA in select-msw.c. xemacs.mak: Add alloca.o.
author ben
date Thu, 23 May 2002 11:46:46 +0000
parents 14089a93af0a
children 2b6fa2618f76
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1 /* emodules.c - Support routines for dynamic module loading
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2 (C) Copyright 1998, 1999 J. Kean Johnston. All rights reserved.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 #include "emodules.h"
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22 #include "sysdll.h"
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23
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24 #ifdef HAVE_SHLIB
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25
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26 /* CE-Emacs version number */
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27 Lisp_Object Vmodule_version;
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28
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29 /* Do we do our work quietly? */
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30 int load_modules_quietly;
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31
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32 /* Load path */
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33 Lisp_Object Vmodule_load_path;
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34
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35 Lisp_Object Qdll_error;
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36
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37 typedef struct _emodules_list
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38 {
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39 int used; /* Is this slot used? */
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40 char *soname; /* Name of the shared object loaded (full path) */
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41 char *modname; /* The name of the module */
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42 char *modver; /* The version that the module is at */
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43 char *modtitle; /* How the module announces itself */
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44 dll_handle dlhandle; /* Dynamic lib handle */
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45 } emodules_list;
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46
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47 static Lisp_Object Vmodule_extensions;
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48
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49 static int emodules_depth;
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50 static dll_handle dlhandle;
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51 static emodules_list *modules;
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52 static int modnum;
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53
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54 static int find_make_module (const char *mod, const char *name, const char *ver, int make_or_find);
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55 static Lisp_Object module_load_unwind (Lisp_Object);
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56 static void attempt_module_delete (int mod);
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57
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58 DEFUN ("load-module", Fload_module, 1, 3, "FLoad dynamic module: ", /*
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59 Load in a C Emacs Extension module named FILE.
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60 The optional NAME and VERSION are used to identify specific modules.
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61
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62 This function is similar in intent to `load' except that it loads in
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63 pre-compiled C or C++ code, using dynamic shared objects. If NAME is
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64 specified, then the module is only loaded if its internal name matches
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65 the NAME specified. If VERSION is specified, then the module is only
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66 loaded if it matches that VERSION. This function will check to make
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67 sure that the same module is not loaded twice. Modules are searched
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68 for in the same way as Lisp files, except that the valid file
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69 extensions are `.so', `.dll' or `.ell'.
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70
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71 All symbols in the shared module must be completely resolved in order
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72 for this function to be successful. Any modules which the specified
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73 FILE depends on will be automatically loaded. You can determine which
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74 modules have been loaded as dynamic shared objects by examining the
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75 return value of the function `list-modules'.
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76
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77 It is possible, although unwise, to unload modules using `unload-module'.
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78 The preferred mechanism for unloading or reloading modules is to quit
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79 XEmacs, and then reload those new or changed modules that are required.
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80
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81 Messages informing you of the progress of the load are displayed unless
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82 the variable `load-modules-quietly' is non-NIL.
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83 */
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84 (file, name, version))
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85 {
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86 char *mod, *mname, *mver;
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87 int speccount = specpdl_depth();
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88
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89 CHECK_STRING(file);
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90
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91 mod = (char *)XSTRING_DATA (file);
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92
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93 if (NILP (name))
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94 mname = "";
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95 else
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96 mname = (char *)XSTRING_DATA (name);
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97
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98 if (NILP (version))
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99 mver = "";
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100 else
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101 mver = (char *)XSTRING_DATA (version);
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102
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103 dlhandle = 0;
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104 record_unwind_protect (module_load_unwind, make_int(modnum));
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105 emodules_load (mod, mname, mver);
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106 unbind_to (speccount);
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107
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108 return Qt;
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109 }
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110
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111 #ifdef DANGEROUS_NASTY_SCARY_MONSTER
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112
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113 DEFUN ("unload-module", Fmodule_unload, 1, 3, 0, /*
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114 Unload a module previously loaded with load-module.
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115
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116 As with load-module, this function requires at least the module FILE, and
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117 optionally the module NAME and VERSION to unload. It may not be possible
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118 for the module to be unloaded from memory, as there may be Lisp objects
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119 referring to variables inside the module code. However, once you have
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120 requested a module to be unloaded, it will be unloaded from memory as
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121 soon as the last reference to symbols within the module is destroyed.
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122 */
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123 (file, name, version))
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124 {
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125 int x;
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126 char *mod, *mname, *mver;
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127
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128 CHECK_STRING(file);
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129
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130 mod = (char *)XSTRING_DATA (file);
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131
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132 if (NILP (name))
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133 mname = "";
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134 else
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135 mname = (char *)XSTRING_DATA (name);
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136
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137 if (NILP (version))
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138 mver = "";
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139 else
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140 mver = (char *)XSTRING_DATA (version);
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141
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142 x = find_make_module (mod, mname, mver, 1);
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143 if (x != -1)
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144 attempt_module_delete (x);
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145 return Qt;
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146 }
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147 #endif /* DANGEROUS_NASTY_SCARY_MONSTER */
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148
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149 DEFUN ("list-modules", Flist_modules, 0, 0, "", /*
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150 Produce a list of loaded dynamic modules.
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151
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152 This function will return a list of all the loaded dynamic modules.
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153 Each element in the list is a list in the form (SONAME NAME VER DESC),
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154 where SONAME is the name of the shared object that was loaded, NAME
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155 is the internal module name, VER is the version of the module, and DESC
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156 is how the module describes itself.
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157
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158 This function returns a list, so you will need to assign the return value
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159 to a variable and then examine the variable with `describe-variable'.
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160 For example:
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161
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162 (setq mylist (list-modules))
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163 (describe-variable 'mylist)
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164
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165
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166 NOTE: It is possible for the same module to be loaded more than once,
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167 at different versions. However, you should never see the same module,
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168 with the same name and version, loaded more than once. If you do, this
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169 is a bug, and you are encouraged to report it.
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170 */
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171 ())
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172 {
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173 Lisp_Object mlist = Qnil;
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174 int i;
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175
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176 for (i = 0; i < modnum; i++)
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177 {
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178 if (modules[i].used == 1)
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179 mlist = Fcons (list4 (build_string (modules[i].soname),
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180 build_string (modules[i].modname),
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181 build_string (modules[i].modver),
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182 build_string (modules[i].modtitle)), mlist);
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183 }
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184
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185 return mlist;
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186 }
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187
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188 static int
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189 find_make_module (const char *mod, const char *name, const char *ver, int mof)
428
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190 {
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191 int i, fs = -1;
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192
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193 for (i = 0; i < modnum; i++)
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194 {
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195 if (fs == -1 && modules[i].used == 0)
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196 fs = i;
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197 if (strcmp (modules[i].soname, mod) == 0)
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198 {
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199 if (name && name[0] && strcmp (modules[i].modname, name))
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200 continue;
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201 if (ver && ver[0] && strcmp (modules[i].modver, ver))
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202 continue;
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203 return i; /* Found a match */
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204 }
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205 }
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206
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207 if (mof)
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208 return fs;
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209
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210 if (fs != -1)
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211 return fs; /* First free slot */
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212
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213 /*
442
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214 * We only get here if we haven't found a free slot and the module was
428
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215 * not previously loaded.
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216 */
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217 if (modules == (emodules_list *)0)
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218 modules = (emodules_list *) xmalloc (sizeof (emodules_list));
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219 modnum++;
440
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220 modules = (emodules_list *) xrealloc (modules, modnum * sizeof (emodules_list));
428
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221
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222 fs = modnum - 1;
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223 memset (&modules[fs], 0, sizeof(emodules_list));
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224 return fs;
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225 }
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226
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227 static void
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228 attempt_module_delete (int mod)
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229 {
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230 if (dll_close (modules[mod].dlhandle) == 0)
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231 {
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232 xfree (modules[mod].soname);
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233 xfree (modules[mod].modname);
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234 xfree (modules[mod].modver);
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235 xfree (modules[mod].modtitle);
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236 modules[mod].dlhandle = 0;
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237 modules[mod].used = 0;
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238 }
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239 else if (modules[mod].used > 1)
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240 modules[mod].used = 1; /* We couldn't delete it - it stays */
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241 }
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242
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243 static Lisp_Object
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244 module_load_unwind (Lisp_Object upto)
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245 {
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246 int x,l=0;
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247
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248 /*
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249 * First close off the current handle if it is open.
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250 */
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251 if (dlhandle != 0)
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252 dll_close (dlhandle);
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253 dlhandle = 0;
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254
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255 if (CONSP (upto))
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256 {
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257 if (INTP (XCAR (upto)))
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258 l = XINT (XCAR (upto));
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259 free_cons (XCONS (upto));
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260 }
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261 else
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262 l = XINT (upto);
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263
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264 /*
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265 * Here we need to go through and dlclose() (IN REVERSE ORDER!) any
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266 * modules that were loaded as part of this load chain. We only mark
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267 * the slots as closed if the dlclose() succeeds.
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268 */
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269 for (x = modnum-1; x >= l; x--)
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270 {
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271 if (modules[x].used > 1)
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272 attempt_module_delete (x);
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273 }
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274 emodules_depth = 0;
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275
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276 return Qnil;
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277 }
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278
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279 /*
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280 * Do the actual grunt-work of loading in a module. We first try and
3ecd8885ac67 Import from CVS: tag r21-2-22
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281 * dlopen() the module. If that fails, we have an error and we bail
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282 * out immediately. If the dlopen() succeeds, we need to check for the
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283 * existence of certain special symbols.
428
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284 *
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285 * All modules will have complete access to the variables and functions
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286 * defined within XEmacs itself. It is up to the module to declare any
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287 * variables or functions it uses, however. Modules will also have access
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288 * to other functions and variables in other loaded modules, unless they
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289 * are defined as STATIC.
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290 *
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291 * We need to be very careful with how we load modules. If we encounter an
3ecd8885ac67 Import from CVS: tag r21-2-22
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292 * error along the way, we need to back out completely to the point at
442
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293 * which the user started. Since we can be called recursively, we need to
428
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294 * take care with marking modules as loaded. When we first start loading
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295 * modules, we set the counter to zero. As we enter the function each time,
442
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296 * we increment the counter, and before we leave we decrement it. When
428
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297 * we get back down to 0, we know we are at the end of the chain and we
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298 * can mark all the modules in the list as loaded.
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299 *
3ecd8885ac67 Import from CVS: tag r21-2-22
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300 * When we signal an error, we need to be sure to unwind all modules loaded
3ecd8885ac67 Import from CVS: tag r21-2-22
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301 * thus far (but only for this module chain). It is assumed that if any
3ecd8885ac67 Import from CVS: tag r21-2-22
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302 * modules in a chain fail, then they all do. This is logical, considering
442
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303 * that the only time we recurse is when we have dependent modules. So in
428
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304 * the error handler we take great care to close off the module chain before
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305 * we call "error" and let the Fmodule_load unwind_protect() function handle
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306 * the cleaning up.
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307 */
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308 void
442
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309 emodules_load(const char *module, const char *modname, const char *modver)
428
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310 {
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311 Lisp_Object filename;
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312 Lisp_Object foundname;
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313 int fd, x, mpx;
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314 char *soname, *tmod;
442
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315 const char **f;
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316 const long *ellcc_rev;
428
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317 char *mver, *mname, *mtitle, *symname;
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318 void (*modload)(void) = 0;
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319 void (*modsyms)(void) = 0;
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320 void (*modvars)(void) = 0;
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321 void (*moddocs)(void) = 0;
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322 emodules_list *mp;
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323 struct gcpro gcpro1,gcpro2;
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324
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325 filename = Qnil;
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326 foundname = Qnil;
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327
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328 emodules_depth++;
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329 dlhandle = 0;
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330
442
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331 if ((module == (const char *)0) || (module[0] == '\0'))
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
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332 invalid_argument ("Empty module name", Qunbound);
428
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cvs
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333
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334 /* This is to get around the fact that build_string() is not declared
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cvs
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335 as taking a const char * as an argument. I HATE compiler warnings. */
851
e7ee5f8bde58 [xemacs-hg @ 2002-05-23 11:46:08 by ben]
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diff changeset
336 tmod = (char *)ALLOCA (strlen (module) + 1);
428
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337 strcpy (tmod, module);
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338
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339 GCPRO2(filename, foundname);
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340 filename = build_string (tmod);
563
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ben
parents: 444
diff changeset
341 fd = locate_file (Vmodule_load_path, filename, Vmodule_extensions,
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
342 &foundname, -1);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
343 UNGCPRO;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
344
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
345 if (fd < 0)
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
346 signal_error (Qdll_error, "Cannot open dynamic module", filename);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
347
851
e7ee5f8bde58 [xemacs-hg @ 2002-05-23 11:46:08 by ben]
ben
parents: 806
diff changeset
348 soname = (char *)ALLOCA (XSTRING_LENGTH (foundname) + 1);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
349 strcpy (soname, (char *)XSTRING_DATA (foundname));
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
350
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
351 dlhandle = dll_open (soname);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
352 if (dlhandle == (dll_handle)0)
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
353 {
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 665
diff changeset
354 Intbyte *dllerrint;
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
355
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
356 EXTERNAL_TO_C_STRING (dll_error (dlhandle), dllerrint, Qnative);
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
357 signal_error (Qdll_error, "Opening dynamic module",
771
943eaba38521 [xemacs-hg @ 2002-03-13 08:51:24 by ben]
ben
parents: 665
diff changeset
358 build_intstring (dllerrint));
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
359 }
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
360
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
361 ellcc_rev = (const long *)dll_variable (dlhandle, "emodule_compiler");
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
362 if ((ellcc_rev == (const long *)0) || (*ellcc_rev <= 0))
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
363 signal_error (Qdll_error, "Invalid dynamic module: Missing symbol `emodule_compiler'", Qunbound);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
364 if (*ellcc_rev > EMODULES_REVISION)
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
365 signal_ferror (Qdll_error, "Invalid dynamic module: Unsupported version `%ld(%ld)'", *ellcc_rev, EMODULES_REVISION);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
366
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
367 f = (const char **)dll_variable (dlhandle, "emodule_name");
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
368 if ((f == (const char **)0) || (*f == (const char *)0))
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
369 signal_error (Qdll_error, "Invalid dynamic module: Missing symbol `emodule_name'", Qunbound);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
370
851
e7ee5f8bde58 [xemacs-hg @ 2002-05-23 11:46:08 by ben]
ben
parents: 806
diff changeset
371 mname = (char *)ALLOCA (strlen (*f) + 1);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
372 strcpy (mname, *f);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
373 if (mname[0] == '\0')
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
374 signal_error (Qdll_error, "Invalid dynamic module: Empty value for `emodule_name'", Qunbound);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
375
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
376 f = (const char **)dll_variable (dlhandle, "emodule_version");
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
377 if ((f == (const char **)0) || (*f == (const char *)0))
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
378 signal_error (Qdll_error, "Missing symbol `emodule_version': Invalid dynamic module", Qunbound);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
379
851
e7ee5f8bde58 [xemacs-hg @ 2002-05-23 11:46:08 by ben]
ben
parents: 806
diff changeset
380 mver = (char *)ALLOCA (strlen (*f) + 1);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
381 strcpy (mver, *f);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
382
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
383 f = (const char **)dll_variable (dlhandle, "emodule_title");
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
384 if ((f == (const char **)0) || (*f == (const char *)0))
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
385 signal_error (Qdll_error, "Invalid dynamic module: Missing symbol `emodule_title'", Qunbound);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
386
851
e7ee5f8bde58 [xemacs-hg @ 2002-05-23 11:46:08 by ben]
ben
parents: 806
diff changeset
387 mtitle = (char *)ALLOCA (strlen (*f) + 1);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
388 strcpy (mtitle, *f);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
389
851
e7ee5f8bde58 [xemacs-hg @ 2002-05-23 11:46:08 by ben]
ben
parents: 806
diff changeset
390 symname = (char *)ALLOCA (strlen (mname) + 15);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
391
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
392 strcpy (symname, "modules_of_");
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
393 strcat (symname, mname);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
394 modload = (void (*)(void))dll_function (dlhandle, symname);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
395 /*
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
396 * modload is optional. If the module doesn't require other modules it can
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
397 * be left out.
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
398 */
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
399
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
400 strcpy (symname, "syms_of_");
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
401 strcat (symname, mname);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
402 modsyms = (void (*)(void))dll_function (dlhandle, symname);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
403 if (modsyms == (void (*)(void))0)
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
404 {
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
405 missing_symbol:
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
406 signal_error (Qdll_error, "Invalid dynamic module: Missing symbol",
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
407 build_string (symname));
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
408 }
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
409
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
410 strcpy (symname, "vars_of_");
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
411 strcat (symname, mname);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
412 modvars = (void (*)(void))dll_function (dlhandle, symname);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
413 if (modvars == (void (*)(void))0)
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
414 goto missing_symbol;
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
415
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
416 strcpy (symname, "docs_of_");
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
417 strcat (symname, mname);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
418 moddocs = (void (*)(void))dll_function (dlhandle, symname);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
419 if (moddocs == (void (*)(void))0)
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
420 goto missing_symbol;
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
421
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
422 if (modname && modname[0] && strcmp (modname, mname))
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
423 signal_error (Qdll_error, "Module name mismatch", Qunbound);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
424
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
425 if (modver && modver[0] && strcmp (modver, mver))
563
183866b06e0b [xemacs-hg @ 2001-05-24 07:50:48 by ben]
ben
parents: 444
diff changeset
426 signal_error (Qdll_error, "Module version mismatch", Qunbound);
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
427
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
428 /*
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
429 * Attempt to make a new slot for this module. If this really is the
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
430 * first time we are loading this module, the used member will be 0.
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
431 * If that is non-zero, we know that we have a previously loaded module
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
432 * of the same name and version, and we don't need to go any further.
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
433 */
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
434 mpx = find_make_module (soname, mname, mver, 0);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
435 mp = &modules[mpx];
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
436 if (mp->used > 0)
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
437 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
438 emodules_depth--;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
439 dll_close (dlhandle);
806
14089a93af0a [xemacs-hg @ 2002-04-05 10:52:06 by stephent]
stephent
parents: 771
diff changeset
440 dlhandle = 0; /* Zero this out before module_load_unwind runs */
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
441 return;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
442 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
443
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
444 if (!load_modules_quietly)
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
445 message ("Loading %s v%s (%s)", mname, mver, mtitle);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
446
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
447 /*
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
448 * We have passed the basic initialization, and can now add this
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
449 * module to the list of modules.
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
450 */
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
451 mp->used = emodules_depth + 1;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
452 mp->soname = xstrdup (soname);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
453 mp->modname = xstrdup (mname);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
454 mp->modver = xstrdup (mver);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
455 mp->modtitle = xstrdup (mtitle);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
456 mp->dlhandle = dlhandle;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
457 dlhandle = 0;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
458
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
459 /*
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
460 * Now we need to call the module init function and perform the various
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
461 * startup tasks.
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
462 */
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
463 if (modload != 0)
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
464 (*modload)();
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
465
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
466 /*
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
467 * Now we can get the module to initialize its symbols, and then its
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
468 * variables, and lastly the documentation strings.
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
469 */
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
470 (*modsyms)();
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
471 (*modvars)();
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
472 (*moddocs)();
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
473
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
474 if (!load_modules_quietly)
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
475 message ("Loaded module %s v%s (%s)", mname, mver, mtitle);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
476
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
477
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
478 emodules_depth--;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
479 if (emodules_depth == 0)
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
480 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
481 /*
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
482 * We have reached the end of the load chain. We now go through the
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
483 * list of loaded modules and mark all the valid modules as just
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
484 * that.
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
485 */
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
486 for (x = 0; x < modnum; x++)
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
487 if (modules[x].used > 1)
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
488 modules[x].used = 1;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
489 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
490 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
491
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
492 void
442
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
493 emodules_doc_subr(const char *symname, const char *doc)
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
494 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
495 Bytecount len = strlen (symname);
665
fdefd0186b75 [xemacs-hg @ 2001-09-20 06:28:42 by ben]
ben
parents: 609
diff changeset
496 Lisp_Object sym = oblookup (Vobarray, (const Intbyte *)symname, len);
440
8de8e3f6228a Import from CVS: tag r21-2-28
cvs
parents: 428
diff changeset
497 Lisp_Subr *subr;
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
498
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
499 if (SYMBOLP(sym))
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
500 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
501 subr = XSUBR( XSYMBOL(sym)->function);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
502 subr->doc = xstrdup (doc);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
503 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
504 /*
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
505 * FIXME: I wish there was some way to avoid the xstrdup(). Is it
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
506 * possible to just set a pointer to the string, or somehow create a
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
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507 * symbol whose value we can point to the constant string? Can someone
3ecd8885ac67 Import from CVS: tag r21-2-22
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508 * look into this?
3ecd8885ac67 Import from CVS: tag r21-2-22
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509 */
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510 }
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511
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512 void
442
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513 emodules_doc_sym (const char *symname, const char *doc)
428
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514 {
3ecd8885ac67 Import from CVS: tag r21-2-22
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515 Bytecount len = strlen (symname);
665
fdefd0186b75 [xemacs-hg @ 2001-09-20 06:28:42 by ben]
ben
parents: 609
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516 Lisp_Object sym = oblookup (Vobarray, (const Intbyte *)symname, len);
428
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517 Lisp_Object docstr;
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518 struct gcpro gcpro1;
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519
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520 if (SYMBOLP(sym))
3ecd8885ac67 Import from CVS: tag r21-2-22
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521 {
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522 docstr = build_string (doc);
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523 GCPRO1(docstr);
3ecd8885ac67 Import from CVS: tag r21-2-22
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524 Fput (sym, Qvariable_documentation, docstr);
3ecd8885ac67 Import from CVS: tag r21-2-22
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525 UNGCPRO;
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526 }
3ecd8885ac67 Import from CVS: tag r21-2-22
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527 }
3ecd8885ac67 Import from CVS: tag r21-2-22
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528
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529
3ecd8885ac67 Import from CVS: tag r21-2-22
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530 void
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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531 syms_of_module (void)
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parents:
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532 {
564
001628b7a5b3 [xemacs-hg @ 2001-05-24 09:37:25 by yoshiki]
yoshiki
parents: 563
diff changeset
533 DEFERROR_STANDARD (Qdll_error, Qerror);
428
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534 DEFSUBR(Fload_module);
3ecd8885ac67 Import from CVS: tag r21-2-22
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parents:
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535 DEFSUBR(Flist_modules);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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536 #ifdef DANGEROUS_NASTY_SCARY_MONSTER
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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537 DEFSUBR(Funload_module);
3ecd8885ac67 Import from CVS: tag r21-2-22
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parents:
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538 #endif
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539 }
3ecd8885ac67 Import from CVS: tag r21-2-22
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parents:
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540
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parents:
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541 void
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parents:
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542 reinit_vars_of_module (void)
3ecd8885ac67 Import from CVS: tag r21-2-22
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parents:
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543 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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544 emodules_depth = 0;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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545 modules = (emodules_list *)0;
3ecd8885ac67 Import from CVS: tag r21-2-22
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parents:
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546 modnum = 0;
3ecd8885ac67 Import from CVS: tag r21-2-22
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547 }
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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548
3ecd8885ac67 Import from CVS: tag r21-2-22
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parents:
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549 void
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cvs
parents:
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550 vars_of_module (void)
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cvs
parents:
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551 {
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552 reinit_vars_of_module ();
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cvs
parents:
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553
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parents:
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554 DEFVAR_LISP ("module-version", &Vmodule_version /*
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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555 Emacs dynamic loading mechanism version, as a string.
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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556
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
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557 This string is in the form XX.YY.ppp, where XX is the major version
3ecd8885ac67 Import from CVS: tag r21-2-22
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parents:
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558 number, YY is the minor version number, and ppp is the patch level.
442
abe6d1db359e Import from CVS: tag r21-2-36
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parents: 440
diff changeset
559 This variable can be used to distinguish between different versions of
428
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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560 the dynamic loading technology used in Emacs, if required. It is not
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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561 a given that this value will be the same as the Emacs version number.
3ecd8885ac67 Import from CVS: tag r21-2-22
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parents:
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562 */ );
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563 Vmodule_version = build_string (EMODULES_VERSION);
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parents:
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564
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565 DEFVAR_BOOL ("load-modules-quietly", &load_modules_quietly /*
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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566 *Set to t if module loading is to be silent.
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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567
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568 Normally, when loading dynamic modules, Emacs will inform you of its
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
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569 progress, and will display the module name and version if the module
3ecd8885ac67 Import from CVS: tag r21-2-22
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570 is loaded correctly. Setting this variable to `t' will suppress these
3ecd8885ac67 Import from CVS: tag r21-2-22
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571 messages. This would normally only be done if `load-module' was being
3ecd8885ac67 Import from CVS: tag r21-2-22
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parents:
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572 called by a Lisp function.
3ecd8885ac67 Import from CVS: tag r21-2-22
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parents:
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573 */);
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574
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575 DEFVAR_LISP ("module-load-path", &Vmodule_load_path /*
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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576 *List of directories to search for dynamic modules to load.
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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577 Each element is a string (directory name) or nil (try default directory).
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parents:
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578
3ecd8885ac67 Import from CVS: tag r21-2-22
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579 Note that elements of this list *may not* begin with "~", so you must
442
abe6d1db359e Import from CVS: tag r21-2-36
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parents: 440
diff changeset
580 call `expand-file-name' on them before adding them to this list.
428
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parents:
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581
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parents:
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582 Initialized based on EMACSMODULEPATH environment variable, if any, otherwise
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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583 to default specified the file `paths.h' when XEmacs was built. If there
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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584 were no paths specified in `paths.h', then XEmacs chooses a default
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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585 value for this variable by looking around in the file-system near the
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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586 directory in which the XEmacs executable resides.
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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587
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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588 Due to the nature of dynamic modules, the path names should almost always
442
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cvs
parents: 440
diff changeset
589 refer to architecture-dependent directories. It is unwise to attempt to
abe6d1db359e Import from CVS: tag r21-2-36
cvs
parents: 440
diff changeset
590 store dynamic modules in a heterogenous environment. Some environments
428
3ecd8885ac67 Import from CVS: tag r21-2-22
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parents:
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591 are similar enough to each other that XEmacs will be unable to determine
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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592 the correctness of a dynamic module, which can have unpredictable results
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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593 when a dynamic module is loaded.
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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594 */);
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cvs
parents:
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595
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parents:
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596 /* #### Export this to Lisp */
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cvs
parents:
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597 Vmodule_extensions = build_string (":.ell:.so:.dll");
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parents:
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598 staticpro (&Vmodule_extensions);
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parents:
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599
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parents:
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600 load_modules_quietly = 0;
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cvs
parents:
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601 Vmodule_load_path = Qnil;
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cvs
parents:
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602 Fprovide (intern ("modules"));
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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603 }
3ecd8885ac67 Import from CVS: tag r21-2-22
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604
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605 #endif /* HAVE_SHLIB */
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
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606