Mercurial > octave
annotate src/dynamic-ld.cc @ 7749:14e05160b99f
reference counting for functions loaded from shared libraries
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 01 May 2008 17:25:56 -0400 |
| parents | 3dc91baee089 |
| children | 1b63f8da772d |
| rev | line source |
|---|---|
| 1 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 4 2002, 2004, 2005, 2006, 2007 John W. Eaton | |
| 1 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 1 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 1 | 21 |
| 22 */ | |
| 23 | |
| 240 | 24 #ifdef HAVE_CONFIG_H |
| 1192 | 25 #include <config.h> |
| 1 | 26 #endif |
| 27 | |
| 4219 | 28 #include <list> |
| 29 | |
| 6323 | 30 #include "oct-env.h" |
| 3325 | 31 #include "oct-time.h" |
| 32 #include "file-stat.h" | |
| 707 | 33 |
| 2492 | 34 #include <defaults.h> |
| 3325 | 35 |
| 36 #include "defun.h" | |
| 1352 | 37 #include "dynamic-ld.h" |
| 7336 | 38 #include "ov-fcn.h" |
| 39 #include "ov-dld-fcn.h" | |
| 40 #include "ov-mex-fcn.h" | |
| 3325 | 41 #include "parse.h" |
| 42 #include "unwind-prot.h" | |
| 1352 | 43 #include "utils.h" |
| 707 | 44 #include "variables.h" |
| 1 | 45 |
| 5864 | 46 #define STRINGIFY(s) STRINGIFY1(s) |
| 47 #define STRINGIFY1(s) #s | |
| 48 | |
| 2894 | 49 class |
| 3325 | 50 octave_shlib_list |
| 1664 | 51 { |
| 2894 | 52 public: |
| 53 | |
| 7748 | 54 typedef std::list<octave_shlib>::iterator iterator; |
| 55 typedef std::list<octave_shlib>::const_iterator const_iterator; | |
| 56 | |
| 3325 | 57 static void append (const octave_shlib& shl); |
| 2894 | 58 |
| 6063 | 59 static void remove (octave_shlib& shl, octave_shlib::close_hook cl_hook = 0); |
| 3325 | 60 |
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61 static octave_shlib find_file (const std::string& file_name); |
| 2894 | 62 |
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63 static void display (void); |
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64 |
| 2894 | 65 private: |
| 66 | |
| 3325 | 67 octave_shlib_list (void) { } |
| 68 | |
| 69 ~octave_shlib_list (void) { } | |
| 70 | |
| 71 void do_append (const octave_shlib& shl); | |
| 72 | |
| 6063 | 73 void do_remove (octave_shlib& shl, octave_shlib::close_hook cl_hook = 0); |
| 3325 | 74 |
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75 octave_shlib do_find_file (const std::string& file_name) const; |
| 3325 | 76 |
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77 void do_display (void) const; |
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78 |
| 3325 | 79 static octave_shlib_list *instance; |
| 80 | |
| 81 static bool instance_ok (void); | |
| 82 | |
| 83 // List of libraries we have loaded. | |
| 4219 | 84 std::list<octave_shlib> lib_list; |
| 2894 | 85 |
| 86 // No copying! | |
| 87 | |
| 3325 | 88 octave_shlib_list (const octave_shlib_list&); |
| 2894 | 89 |
| 3325 | 90 octave_shlib_list& operator = (const octave_shlib_list&); |
| 2894 | 91 }; |
| 92 | |
| 3325 | 93 octave_shlib_list *octave_shlib_list::instance = 0; |
| 3321 | 94 |
| 3325 | 95 void |
| 96 octave_shlib_list::do_append (const octave_shlib& shl) | |
| 97 { | |
| 4219 | 98 lib_list.push_back (shl); |
| 1664 | 99 } |
| 100 | |
| 3325 | 101 void |
| 6063 | 102 octave_shlib_list::do_remove (octave_shlib& shl, |
| 103 octave_shlib::close_hook cl_hook) | |
| 1664 | 104 { |
| 7748 | 105 for (iterator p = lib_list.begin (); p != lib_list.end (); p++) |
| 3325 | 106 { |
| 4219 | 107 if (*p == shl) |
| 3325 | 108 { |
| 6063 | 109 shl.close (cl_hook); |
| 1664 | 110 |
| 4219 | 111 lib_list.erase (p); |
| 3033 | 112 |
| 3325 | 113 break; |
| 1664 | 114 } |
| 115 } | |
| 116 } | |
| 117 | |
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118 octave_shlib |
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119 octave_shlib_list::do_find_file (const std::string& file_name) const |
| 3325 | 120 { |
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121 octave_shlib retval; |
| 1664 | 122 |
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123 for (const_iterator p = lib_list.begin (); p != lib_list.end (); p++) |
| 3325 | 124 { |
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125 if (p->file_name () == file_name) |
| 3325 | 126 { |
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127 retval = *p; |
| 3325 | 128 break; |
| 129 } | |
| 130 } | |
| 131 | |
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132 return retval; |
| 3325 | 133 } |
| 2926 | 134 |
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135 void |
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136 octave_shlib_list::do_display (void) const |
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137 { |
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138 std::cerr << "current shared libraries:" << std::endl; |
| 7748 | 139 for (const_iterator p = lib_list.begin (); p != lib_list.end (); p++) |
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140 std::cerr << " " << p->file_name () << std::endl; |
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141 } |
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142 |
| 2926 | 143 bool |
| 3325 | 144 octave_shlib_list::instance_ok (void) |
| 2926 | 145 { |
| 146 bool retval = true; | |
| 147 | |
| 148 if (! instance) | |
| 3325 | 149 instance = new octave_shlib_list (); |
| 2926 | 150 |
| 151 if (! instance) | |
| 152 { | |
| 3325 | 153 ::error ("unable to create shared library list object!"); |
| 2926 | 154 |
| 155 retval = false; | |
| 156 } | |
| 157 | |
| 158 return retval; | |
| 159 } | |
| 160 | |
| 161 void | |
| 3325 | 162 octave_shlib_list::append (const octave_shlib& shl) |
| 163 { | |
| 164 if (instance_ok ()) | |
| 165 instance->do_append (shl); | |
| 166 } | |
| 167 | |
| 168 void | |
| 6063 | 169 octave_shlib_list::remove (octave_shlib& shl, |
| 170 octave_shlib::close_hook cl_hook) | |
| 2894 | 171 { |
| 3325 | 172 if (instance_ok ()) |
| 6063 | 173 instance->do_remove (shl, cl_hook); |
| 2894 | 174 } |
| 175 | |
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176 octave_shlib |
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177 octave_shlib_list::find_file (const std::string& file_name) |
| 3325 | 178 { |
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179 return (instance_ok ()) |
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180 ? instance->do_find_file (file_name) : octave_shlib (); |
| 3325 | 181 } |
| 182 | |
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183 void |
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184 octave_shlib_list::display (void) |
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185 { |
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186 if (instance_ok ()) |
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187 instance->do_display (); |
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188 } |
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189 |
| 5864 | 190 class |
| 191 octave_mex_file_list | |
| 192 { | |
| 193 public: | |
| 194 | |
| 7748 | 195 typedef std::list<octave_shlib>::iterator iterator; |
| 196 typedef std::list<octave_shlib>::const_iterator const_iterator; | |
| 197 | |
| 5864 | 198 static void append (const octave_shlib& shl); |
| 199 | |
| 6063 | 200 static void remove (octave_shlib& shl, octave_shlib::close_hook cl_hook = 0); |
| 5864 | 201 |
| 202 private: | |
| 203 | |
| 204 octave_mex_file_list (void) { } | |
| 205 | |
| 206 ~octave_mex_file_list (void) { } | |
| 207 | |
| 208 void do_append (const octave_shlib& shl); | |
| 209 | |
| 6063 | 210 void do_remove (octave_shlib& shl, octave_shlib::close_hook cl_hook = 0); |
| 5864 | 211 |
| 212 static octave_mex_file_list *instance; | |
| 213 | |
| 214 static bool instance_ok (void); | |
| 215 | |
| 216 // List of libraries we have loaded. | |
| 217 std::list<octave_shlib> file_list; | |
| 218 | |
| 219 // No copying! | |
| 220 | |
| 221 octave_mex_file_list (const octave_mex_file_list&); | |
| 222 | |
| 223 octave_mex_file_list& operator = (const octave_mex_file_list&); | |
| 224 }; | |
| 225 | |
| 226 octave_mex_file_list *octave_mex_file_list::instance = 0; | |
| 227 | |
| 228 void | |
| 229 octave_mex_file_list::do_append (const octave_shlib& shl) | |
| 230 { | |
| 231 file_list.push_back (shl); | |
| 232 } | |
| 233 | |
| 234 void | |
| 6063 | 235 octave_mex_file_list::do_remove (octave_shlib& shl, |
| 236 octave_shlib::close_hook cl_hook) | |
| 5864 | 237 { |
| 7748 | 238 for (iterator p = file_list.begin (); p != file_list.end (); p++) |
| 5864 | 239 { |
| 240 if (*p == shl) | |
| 241 { | |
| 6063 | 242 shl.close (cl_hook); |
| 5864 | 243 |
| 244 file_list.erase (p); | |
| 245 | |
| 246 break; | |
| 247 } | |
| 248 } | |
| 249 } | |
| 250 | |
| 251 bool | |
| 252 octave_mex_file_list::instance_ok (void) | |
| 253 { | |
| 254 bool retval = true; | |
| 255 | |
| 256 if (! instance) | |
| 257 instance = new octave_mex_file_list (); | |
| 258 | |
| 259 if (! instance) | |
| 260 { | |
| 261 ::error ("unable to create shared library list object!"); | |
| 262 | |
| 263 retval = false; | |
| 264 } | |
| 265 | |
| 266 return retval; | |
| 267 } | |
| 268 | |
| 269 void | |
| 270 octave_mex_file_list::append (const octave_shlib& shl) | |
| 271 { | |
| 272 if (instance_ok ()) | |
| 273 instance->do_append (shl); | |
| 274 } | |
| 275 | |
| 276 void | |
| 6063 | 277 octave_mex_file_list::remove (octave_shlib& shl, |
| 278 octave_shlib::close_hook cl_hook) | |
| 5864 | 279 { |
| 280 if (instance_ok ()) | |
| 6063 | 281 instance->do_remove (shl, cl_hook); |
| 5864 | 282 } |
| 283 | |
| 3325 | 284 octave_dynamic_loader *octave_dynamic_loader::instance = 0; |
| 285 | |
| 286 bool octave_dynamic_loader::doing_load = false; | |
| 287 | |
| 2969 | 288 bool |
| 3325 | 289 octave_dynamic_loader::instance_ok (void) |
| 707 | 290 { |
| 3325 | 291 bool retval = true; |
| 1664 | 292 |
| 3325 | 293 if (! instance) |
| 294 instance = new octave_dynamic_loader (); | |
| 707 | 295 |
| 3325 | 296 if (! instance) |
| 707 | 297 { |
| 3655 | 298 ::error ("unable to create dynamic loader object!"); |
| 707 | 299 |
| 3325 | 300 retval = false; |
| 707 | 301 } |
| 302 | |
| 2893 | 303 return retval; |
| 304 } | |
| 305 | |
| 3325 | 306 static |
| 4954 | 307 void do_clear_function (const std::string& fcn_name) |
| 3325 | 308 { |
| 5781 | 309 warning_with_id ("Octave:reload-forces-clear", " %s", fcn_name.c_str ()); |
| 3325 | 310 |
| 7336 | 311 symbol_table::clear_user_function (fcn_name); |
| 3325 | 312 } |
| 313 | |
| 6323 | 314 static void |
| 315 clear (octave_shlib& oct_file) | |
| 316 { | |
| 317 if (oct_file.number_of_functions_loaded () > 1) | |
| 318 warning_with_id ("Octave:reload-forces-clear", | |
| 319 "reloading %s clears the following functions:", | |
| 320 oct_file.file_name().c_str ()); | |
| 321 | |
| 322 octave_shlib_list::remove (oct_file, do_clear_function); | |
| 323 } | |
| 324 | |
| 7336 | 325 octave_function * |
| 5864 | 326 octave_dynamic_loader::do_load_oct (const std::string& fcn_name, |
| 6323 | 327 const std::string& file_name, |
| 328 bool relative) | |
| 2893 | 329 { |
| 7336 | 330 octave_function *retval = 0; |
| 3325 | 331 |
| 332 unwind_protect::begin_frame ("octave_dynamic_loader::do_load"); | |
| 333 | |
| 334 unwind_protect_bool (octave_dynamic_loader::doing_load); | |
| 335 | |
| 336 doing_load = true; | |
| 337 | |
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338 octave_shlib oct_file = octave_shlib_list::find_file (file_name); |
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339 |
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340 if (oct_file && oct_file.is_out_of_date ()) |
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341 clear (oct_file); |
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342 |
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343 if (! oct_file) |
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344 { |
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345 oct_file.open (file_name); |
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346 |
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347 if (! error_state && oct_file) |
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348 { |
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349 octave_shlib_list::append (oct_file); |
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350 |
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351 if (relative) |
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352 oct_file.mark_relative (); |
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353 } |
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354 } |
| 3325 | 355 |
| 356 if (! error_state) | |
| 357 { | |
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358 if (oct_file) |
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359 { |
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360 void *function = oct_file.search (fcn_name, xmangle_name); |
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361 |
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362 if (function) |
| 6323 | 363 { |
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364 octave_dld_fcn_getter f |
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365 = FCN_PTR_CAST (octave_dld_fcn_getter, function); |
| 7748 | 366 |
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367 retval = f (oct_file, relative); |
| 7748 | 368 |
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369 if (! retval) |
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370 ::error ("failed to install .oct file function `%s'", |
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371 fcn_name.c_str ()); |
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372 } |
| 3325 | 373 } |
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374 else |
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375 ::error ("%s is not a valid shared library", |
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376 file_name.c_str ()); |
| 3325 | 377 } |
| 3655 | 378 |
| 3325 | 379 unwind_protect::run_frame ("octave_dynamic_loader::do_load"); |
| 380 | |
| 381 return retval; | |
| 382 } | |
| 383 | |
| 7336 | 384 octave_function * |
| 5864 | 385 octave_dynamic_loader::do_load_mex (const std::string& fcn_name, |
| 6323 | 386 const std::string& file_name, |
| 387 bool relative) | |
| 5864 | 388 { |
| 7336 | 389 octave_function *retval = 0; |
| 5864 | 390 |
| 391 octave_shlib mex_file; | |
| 392 | |
| 393 unwind_protect::begin_frame ("octave_dynamic_loader::do_load"); | |
| 394 | |
| 395 unwind_protect_bool (octave_dynamic_loader::doing_load); | |
| 396 | |
| 397 doing_load = true; | |
| 398 | |
| 6323 | 399 std::string mex_file_name = file_name; |
| 400 | |
| 401 if (mex_file_name.empty ()) | |
| 402 { | |
| 403 mex_file_name = mex_file_in_path (fcn_name); | |
| 404 | |
| 405 if (! mex_file_name.empty ()) | |
| 406 relative = ! octave_env::absolute_pathname (mex_file_name); | |
| 407 } | |
| 5864 | 408 |
| 409 void *function = 0; | |
| 410 | |
| 411 bool have_fmex = false; | |
| 412 | |
| 413 if (! mex_file_name.empty ()) | |
| 414 { | |
| 415 mex_file.open (mex_file_name); | |
| 416 | |
| 417 if (! error_state) | |
| 418 { | |
| 419 if (mex_file) | |
| 420 { | |
| 421 octave_mex_file_list::append (mex_file); | |
| 422 | |
| 423 function = mex_file.search ("mexFunction"); | |
| 424 | |
| 425 if (! function) | |
| 426 { | |
| 6221 | 427 // FIXME -- can we determine this C mangling scheme |
| 428 // automatically at run time or configure time? | |
| 429 | |
| 430 function = mex_file.search ("_mexFunction"); | |
| 431 | |
| 432 if (! function) | |
| 433 { | |
| 434 function = mex_file.search (STRINGIFY (F77_FUNC (mexfunction, MEXFUNCTION))); | |
| 435 if (function) | |
| 436 have_fmex = true; | |
| 437 } | |
| 5864 | 438 } |
| 439 } | |
| 440 else | |
| 441 ::error ("%s is not a valid shared library", | |
| 442 mex_file_name.c_str ()); | |
| 443 } | |
| 444 } | |
| 445 | |
| 446 if (function) | |
| 7336 | 447 retval = new octave_mex_function (function, have_fmex, mex_file, fcn_name); |
| 5864 | 448 else |
| 449 ::error ("failed to install .mex file function `%s'", fcn_name.c_str ()); | |
| 450 | |
| 451 unwind_protect::run_frame ("octave_dynamic_loader::do_load"); | |
| 452 | |
| 453 return retval; | |
| 454 } | |
| 455 | |
| 456 bool | |
| 3523 | 457 octave_dynamic_loader::do_remove (const std::string& fcn_name, octave_shlib& shl) |
| 3325 | 458 { |
| 459 bool retval = false; | |
| 460 | |
| 461 // We don't need to do anything if this is called because we are in | |
| 462 // the process of reloading a .oct file that has changed. | |
| 463 | |
| 464 if (! doing_load) | |
| 465 { | |
| 466 retval = shl.remove (fcn_name); | |
| 467 | |
| 468 if (shl.number_of_functions_loaded () == 0) | |
| 469 octave_shlib_list::remove (shl); | |
| 470 } | |
| 471 | |
| 472 return retval; | |
| 473 } | |
| 474 | |
| 7336 | 475 octave_function * |
| 5864 | 476 octave_dynamic_loader::load_oct (const std::string& fcn_name, |
| 7336 | 477 const std::string& file_name, |
| 478 bool relative) | |
| 3325 | 479 { |
| 6323 | 480 return (instance_ok ()) |
| 7336 | 481 ? instance->do_load_oct (fcn_name, file_name, relative) : 0; |
| 5864 | 482 } |
| 483 | |
| 7336 | 484 octave_function * |
| 5864 | 485 octave_dynamic_loader::load_mex (const std::string& fcn_name, |
| 7336 | 486 const std::string& file_name, |
| 487 bool relative) | |
| 5864 | 488 { |
| 6323 | 489 return (instance_ok ()) |
| 7336 | 490 ? instance->do_load_mex (fcn_name, file_name, relative) : 0; |
| 3325 | 491 } |
| 492 | |
| 493 bool | |
| 3523 | 494 octave_dynamic_loader::remove (const std::string& fcn_name, octave_shlib& shl) |
| 3325 | 495 { |
| 496 return (instance_ok ()) ? instance->do_remove (fcn_name, shl) : false; | |
| 2893 | 497 } |
| 707 | 498 |
| 3536 | 499 std::string |
| 3523 | 500 octave_dynamic_loader::mangle_name (const std::string& name) |
| 2894 | 501 { |
| 3222 | 502 #if defined (CXX_PREPENDS_UNDERSCORE) |
| 3523 | 503 std::string retval ("_FS"); |
| 3222 | 504 #else |
| 3523 | 505 std::string retval ("FS"); |
| 3222 | 506 #endif |
| 2894 | 507 retval.append (name); |
| 3842 | 508 retval.append ("_"); |
| 509 retval.append (STRINGIFY (CXX_ABI)); | |
| 2894 | 510 return retval; |
| 511 } | |
| 707 | 512 |
| 7336 | 513 std::string |
| 514 octave_dynamic_loader::xmangle_name (const std::string& name) | |
| 515 { | |
| 516 #if defined (CXX_PREPENDS_UNDERSCORE) | |
| 517 std::string retval ("_G"); | |
| 518 #else | |
| 519 std::string retval ("G"); | |
| 520 #endif | |
| 521 retval.append (name); | |
| 522 retval.append ("_"); | |
| 523 retval.append (STRINGIFY (CXX_ABI)); | |
| 524 return retval; | |
| 525 } | |
| 526 | |
| 1 | 527 /* |
| 528 ;;; Local Variables: *** | |
| 529 ;;; mode: C++ *** | |
| 530 ;;; End: *** | |
| 531 */ |