annotate vamp-sdk/hostext/PluginLoader.cpp @ 130:44e6b94c2696

* patch from Tim Blechmann for gcc-4.3 compile
author cannam
date Tue, 11 Mar 2008 09:22:53 +0000
parents 896a97349ac5
children 761d248f0198
rev   line source
cannam@64 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
cannam@64 2
cannam@64 3 /*
cannam@64 4 Vamp
cannam@64 5
cannam@64 6 An API for audio analysis and feature extraction plugins.
cannam@64 7
cannam@64 8 Centre for Digital Music, Queen Mary, University of London.
cannam@71 9 Copyright 2006-2007 Chris Cannam and QMUL.
cannam@64 10
cannam@64 11 Permission is hereby granted, free of charge, to any person
cannam@64 12 obtaining a copy of this software and associated documentation
cannam@64 13 files (the "Software"), to deal in the Software without
cannam@64 14 restriction, including without limitation the rights to use, copy,
cannam@64 15 modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@64 16 of the Software, and to permit persons to whom the Software is
cannam@64 17 furnished to do so, subject to the following conditions:
cannam@64 18
cannam@64 19 The above copyright notice and this permission notice shall be
cannam@64 20 included in all copies or substantial portions of the Software.
cannam@64 21
cannam@64 22 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@64 23 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@64 24 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@64 25 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
cannam@64 26 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@64 27 CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@64 28 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@64 29
cannam@64 30 Except as contained in this notice, the names of the Centre for
cannam@64 31 Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@64 32 shall not be used in advertising or otherwise to promote the sale,
cannam@64 33 use or other dealings in this Software without prior written
cannam@64 34 authorization.
cannam@64 35 */
cannam@64 36
cannam@64 37 #include "vamp-sdk/PluginHostAdapter.h"
cannam@64 38 #include "PluginLoader.h"
cannam@64 39 #include "PluginInputDomainAdapter.h"
cannam@64 40 #include "PluginChannelAdapter.h"
cannam@92 41 #include "PluginBufferingAdapter.h"
cannam@64 42
cannam@64 43 #include <fstream>
cannam@75 44 #include <cctype> // tolower
cannam@64 45
cannam@130 46 #include <cstring>
cannam@130 47
cannam@64 48 #ifdef _WIN32
cannam@64 49
cannam@64 50 #include <windows.h>
cannam@64 51 #include <tchar.h>
cannam@64 52 #define PLUGIN_SUFFIX "dll"
cannam@64 53
cannam@64 54 #else /* ! _WIN32 */
cannam@64 55
cannam@64 56 #include <dirent.h>
cannam@64 57 #include <dlfcn.h>
cannam@64 58
cannam@64 59 #ifdef __APPLE__
cannam@64 60 #define PLUGIN_SUFFIX "dylib"
cannam@64 61 #else /* ! __APPLE__ */
cannam@64 62 #define PLUGIN_SUFFIX "so"
cannam@64 63 #endif /* ! __APPLE__ */
cannam@64 64
cannam@64 65 #endif /* ! _WIN32 */
cannam@64 66
cannam@64 67 using namespace std;
cannam@64 68
cannam@64 69 namespace Vamp {
cannam@64 70
cannam@64 71 namespace HostExt {
cannam@64 72
cannam@69 73 class PluginLoader::Impl
cannam@69 74 {
cannam@69 75 public:
cannam@72 76 Impl();
cannam@72 77 virtual ~Impl();
cannam@69 78
cannam@69 79 PluginKeyList listPlugins();
cannam@69 80
cannam@69 81 Plugin *loadPlugin(PluginKey key,
cannam@69 82 float inputSampleRate,
cannam@69 83 int adapterFlags);
cannam@69 84
cannam@69 85 PluginKey composePluginKey(string libraryName, string identifier);
cannam@69 86
cannam@69 87 PluginCategoryHierarchy getPluginCategory(PluginKey key);
cannam@69 88
cannam@72 89 string getLibraryPathForPlugin(PluginKey key);
cannam@69 90
cannam@98 91 static void setInstanceToClean(PluginLoader *instance);
cannam@98 92
cannam@69 93 protected:
cannam@69 94 class PluginDeletionNotifyAdapter : public PluginWrapper {
cannam@69 95 public:
cannam@69 96 PluginDeletionNotifyAdapter(Plugin *plugin, Impl *loader);
cannam@69 97 virtual ~PluginDeletionNotifyAdapter();
cannam@69 98 protected:
cannam@69 99 Impl *m_loader;
cannam@69 100 };
cannam@69 101
cannam@98 102 class InstanceCleaner {
cannam@98 103 public:
cannam@98 104 InstanceCleaner() : m_instance(0) { }
cannam@98 105 ~InstanceCleaner() { delete m_instance; }
cannam@98 106 void setInstance(PluginLoader *instance) { m_instance = instance; }
cannam@98 107 protected:
cannam@98 108 PluginLoader *m_instance;
cannam@98 109 };
cannam@98 110
cannam@69 111 virtual void pluginDeleted(PluginDeletionNotifyAdapter *adapter);
cannam@69 112
cannam@72 113 map<PluginKey, string> m_pluginLibraryNameMap;
cannam@72 114 bool m_allPluginsEnumerated;
cannam@72 115 void enumeratePlugins(PluginKey forPlugin = "");
cannam@69 116
cannam@72 117 map<PluginKey, PluginCategoryHierarchy> m_taxonomy;
cannam@69 118 void generateTaxonomy();
cannam@69 119
cannam@72 120 map<Plugin *, void *> m_pluginLibraryHandleMap;
cannam@69 121
cannam@72 122 bool decomposePluginKey(PluginKey key,
cannam@72 123 string &libraryName, string &identifier);
cannam@72 124
cannam@72 125 void *loadLibrary(string path);
cannam@69 126 void unloadLibrary(void *handle);
cannam@69 127 void *lookupInLibrary(void *handle, const char *symbol);
cannam@69 128
cannam@72 129 string splicePath(string a, string b);
cannam@72 130 vector<string> listFiles(string dir, string ext);
cannam@98 131
cannam@98 132 static InstanceCleaner m_cleaner;
cannam@69 133 };
cannam@69 134
cannam@64 135 PluginLoader *
cannam@64 136 PluginLoader::m_instance = 0;
cannam@64 137
cannam@98 138 PluginLoader::Impl::InstanceCleaner
cannam@98 139 PluginLoader::Impl::m_cleaner;
cannam@98 140
cannam@64 141 PluginLoader::PluginLoader()
cannam@64 142 {
cannam@69 143 m_impl = new Impl();
cannam@64 144 }
cannam@64 145
cannam@64 146 PluginLoader::~PluginLoader()
cannam@64 147 {
cannam@69 148 delete m_impl;
cannam@64 149 }
cannam@64 150
cannam@64 151 PluginLoader *
cannam@64 152 PluginLoader::getInstance()
cannam@64 153 {
cannam@98 154 if (!m_instance) {
cannam@98 155 // The cleaner doesn't own the instance, because we leave the
cannam@98 156 // instance pointer in the base class for binary backwards
cannam@98 157 // compatibility reasons and to avoid waste
cannam@98 158 m_instance = new PluginLoader();
cannam@98 159 Impl::setInstanceToClean(m_instance);
cannam@98 160 }
cannam@64 161 return m_instance;
cannam@64 162 }
cannam@64 163
cannam@64 164 vector<PluginLoader::PluginKey>
cannam@64 165 PluginLoader::listPlugins()
cannam@64 166 {
cannam@69 167 return m_impl->listPlugins();
cannam@69 168 }
cannam@69 169
cannam@69 170 Plugin *
cannam@69 171 PluginLoader::loadPlugin(PluginKey key,
cannam@69 172 float inputSampleRate,
cannam@69 173 int adapterFlags)
cannam@69 174 {
cannam@69 175 return m_impl->loadPlugin(key, inputSampleRate, adapterFlags);
cannam@69 176 }
cannam@69 177
cannam@69 178 PluginLoader::PluginKey
cannam@69 179 PluginLoader::composePluginKey(string libraryName, string identifier)
cannam@69 180 {
cannam@69 181 return m_impl->composePluginKey(libraryName, identifier);
cannam@69 182 }
cannam@69 183
cannam@69 184 PluginLoader::PluginCategoryHierarchy
cannam@69 185 PluginLoader::getPluginCategory(PluginKey key)
cannam@69 186 {
cannam@69 187 return m_impl->getPluginCategory(key);
cannam@69 188 }
cannam@69 189
cannam@69 190 string
cannam@69 191 PluginLoader::getLibraryPathForPlugin(PluginKey key)
cannam@69 192 {
cannam@69 193 return m_impl->getLibraryPathForPlugin(key);
cannam@69 194 }
cannam@72 195
cannam@72 196 PluginLoader::Impl::Impl() :
cannam@72 197 m_allPluginsEnumerated(false)
cannam@72 198 {
cannam@72 199 }
cannam@72 200
cannam@72 201 PluginLoader::Impl::~Impl()
cannam@72 202 {
cannam@72 203 }
cannam@69 204
cannam@98 205 void
cannam@98 206 PluginLoader::Impl::setInstanceToClean(PluginLoader *instance)
cannam@98 207 {
cannam@98 208 m_cleaner.setInstance(instance);
cannam@98 209 }
cannam@98 210
cannam@69 211 vector<PluginLoader::PluginKey>
cannam@69 212 PluginLoader::Impl::listPlugins()
cannam@69 213 {
cannam@72 214 if (!m_allPluginsEnumerated) enumeratePlugins();
cannam@64 215
cannam@64 216 vector<PluginKey> plugins;
cannam@72 217 for (map<PluginKey, string>::iterator mi = m_pluginLibraryNameMap.begin();
cannam@64 218 mi != m_pluginLibraryNameMap.end(); ++mi) {
cannam@64 219 plugins.push_back(mi->first);
cannam@64 220 }
cannam@64 221
cannam@64 222 return plugins;
cannam@64 223 }
cannam@64 224
cannam@64 225 void
cannam@72 226 PluginLoader::Impl::enumeratePlugins(PluginKey forPlugin)
cannam@64 227 {
cannam@64 228 vector<string> path = PluginHostAdapter::getPluginPath();
cannam@64 229
cannam@72 230 string libraryName, identifier;
cannam@72 231 if (forPlugin != "") {
cannam@72 232 if (!decomposePluginKey(forPlugin, libraryName, identifier)) {
cannam@72 233 std::cerr << "WARNING: Vamp::HostExt::PluginLoader: Invalid plugin key \""
cannam@72 234 << forPlugin << "\" in enumerate" << std::endl;
cannam@72 235 return;
cannam@72 236 }
cannam@72 237 }
cannam@72 238
cannam@64 239 for (size_t i = 0; i < path.size(); ++i) {
cannam@64 240
cannam@64 241 vector<string> files = listFiles(path[i], PLUGIN_SUFFIX);
cannam@64 242
cannam@64 243 for (vector<string>::iterator fi = files.begin();
cannam@64 244 fi != files.end(); ++fi) {
cannam@64 245
cannam@72 246 if (libraryName != "") {
cannam@73 247 // libraryName is lowercased and lacking an extension,
cannam@73 248 // as it came from the plugin key
cannam@73 249 string temp = *fi;
cannam@73 250 for (size_t i = 0; i < temp.length(); ++i) {
cannam@75 251 temp[i] = tolower(temp[i]);
cannam@73 252 }
cannam@73 253 string::size_type pi = temp.find('.');
cannam@72 254 if (pi == string::npos) {
cannam@73 255 if (libraryName != temp) continue;
cannam@72 256 } else {
cannam@73 257 if (libraryName != temp.substr(0, pi)) continue;
cannam@72 258 }
cannam@72 259 }
cannam@72 260
cannam@64 261 string fullPath = path[i];
cannam@64 262 fullPath = splicePath(fullPath, *fi);
cannam@64 263 void *handle = loadLibrary(fullPath);
cannam@64 264 if (!handle) continue;
cannam@64 265
cannam@64 266 VampGetPluginDescriptorFunction fn =
cannam@64 267 (VampGetPluginDescriptorFunction)lookupInLibrary
cannam@64 268 (handle, "vampGetPluginDescriptor");
cannam@64 269
cannam@64 270 if (!fn) {
cannam@64 271 unloadLibrary(handle);
cannam@64 272 continue;
cannam@64 273 }
cannam@64 274
cannam@64 275 int index = 0;
cannam@64 276 const VampPluginDescriptor *descriptor = 0;
cannam@64 277
cannam@64 278 while ((descriptor = fn(VAMP_API_VERSION, index))) {
cannam@72 279 ++index;
cannam@72 280 if (identifier != "") {
cannam@72 281 if (descriptor->identifier != identifier) continue;
cannam@72 282 }
cannam@64 283 PluginKey key = composePluginKey(*fi, descriptor->identifier);
cannam@72 284 // std::cerr << "enumerate: " << key << " (path: " << fullPath << ")" << std::endl;
cannam@64 285 if (m_pluginLibraryNameMap.find(key) ==
cannam@64 286 m_pluginLibraryNameMap.end()) {
cannam@64 287 m_pluginLibraryNameMap[key] = fullPath;
cannam@64 288 }
cannam@64 289 }
cannam@64 290
cannam@64 291 unloadLibrary(handle);
cannam@64 292 }
cannam@64 293 }
cannam@72 294
cannam@72 295 if (forPlugin == "") m_allPluginsEnumerated = true;
cannam@64 296 }
cannam@64 297
cannam@64 298 PluginLoader::PluginKey
cannam@69 299 PluginLoader::Impl::composePluginKey(string libraryName, string identifier)
cannam@64 300 {
cannam@64 301 string basename = libraryName;
cannam@64 302
cannam@64 303 string::size_type li = basename.rfind('/');
cannam@64 304 if (li != string::npos) basename = basename.substr(li + 1);
cannam@64 305
cannam@64 306 li = basename.find('.');
cannam@64 307 if (li != string::npos) basename = basename.substr(0, li);
cannam@64 308
cannam@73 309 for (size_t i = 0; i < basename.length(); ++i) {
cannam@75 310 basename[i] = tolower(basename[i]);
cannam@73 311 }
cannam@73 312
cannam@64 313 return basename + ":" + identifier;
cannam@64 314 }
cannam@64 315
cannam@72 316 bool
cannam@72 317 PluginLoader::Impl::decomposePluginKey(PluginKey key,
cannam@72 318 string &libraryName,
cannam@72 319 string &identifier)
cannam@72 320 {
cannam@72 321 string::size_type ki = key.find(':');
cannam@72 322 if (ki == string::npos) {
cannam@72 323 return false;
cannam@72 324 }
cannam@72 325
cannam@72 326 libraryName = key.substr(0, ki);
cannam@72 327 identifier = key.substr(ki + 1);
cannam@72 328 return true;
cannam@72 329 }
cannam@72 330
cannam@64 331 PluginLoader::PluginCategoryHierarchy
cannam@69 332 PluginLoader::Impl::getPluginCategory(PluginKey plugin)
cannam@64 333 {
cannam@64 334 if (m_taxonomy.empty()) generateTaxonomy();
cannam@69 335 if (m_taxonomy.find(plugin) == m_taxonomy.end()) {
cannam@69 336 return PluginCategoryHierarchy();
cannam@69 337 }
cannam@64 338 return m_taxonomy[plugin];
cannam@64 339 }
cannam@64 340
cannam@64 341 string
cannam@69 342 PluginLoader::Impl::getLibraryPathForPlugin(PluginKey plugin)
cannam@64 343 {
cannam@72 344 if (m_pluginLibraryNameMap.find(plugin) == m_pluginLibraryNameMap.end()) {
cannam@72 345 if (m_allPluginsEnumerated) return "";
cannam@72 346 enumeratePlugins(plugin);
cannam@72 347 }
cannam@72 348 if (m_pluginLibraryNameMap.find(plugin) == m_pluginLibraryNameMap.end()) {
cannam@72 349 return "";
cannam@72 350 }
cannam@64 351 return m_pluginLibraryNameMap[plugin];
cannam@64 352 }
cannam@64 353
cannam@64 354 Plugin *
cannam@69 355 PluginLoader::Impl::loadPlugin(PluginKey key,
cannam@69 356 float inputSampleRate, int adapterFlags)
cannam@64 357 {
cannam@72 358 string libname, identifier;
cannam@72 359 if (!decomposePluginKey(key, libname, identifier)) {
cannam@72 360 std::cerr << "Vamp::HostExt::PluginLoader: Invalid plugin key \""
cannam@72 361 << key << "\" in loadPlugin" << std::endl;
cannam@72 362 return 0;
cannam@72 363 }
cannam@72 364
cannam@64 365 string fullPath = getLibraryPathForPlugin(key);
cannam@64 366 if (fullPath == "") return 0;
cannam@64 367
cannam@64 368 void *handle = loadLibrary(fullPath);
cannam@64 369 if (!handle) return 0;
cannam@64 370
cannam@64 371 VampGetPluginDescriptorFunction fn =
cannam@64 372 (VampGetPluginDescriptorFunction)lookupInLibrary
cannam@64 373 (handle, "vampGetPluginDescriptor");
cannam@64 374
cannam@64 375 if (!fn) {
cannam@64 376 unloadLibrary(handle);
cannam@64 377 return 0;
cannam@64 378 }
cannam@64 379
cannam@64 380 int index = 0;
cannam@64 381 const VampPluginDescriptor *descriptor = 0;
cannam@64 382
cannam@64 383 while ((descriptor = fn(VAMP_API_VERSION, index))) {
cannam@64 384
cannam@64 385 if (string(descriptor->identifier) == identifier) {
cannam@64 386
cannam@64 387 Vamp::PluginHostAdapter *plugin =
cannam@64 388 new Vamp::PluginHostAdapter(descriptor, inputSampleRate);
cannam@64 389
cannam@64 390 Plugin *adapter = new PluginDeletionNotifyAdapter(plugin, this);
cannam@64 391
cannam@64 392 m_pluginLibraryHandleMap[adapter] = handle;
cannam@64 393
cannam@64 394 if (adapterFlags & ADAPT_INPUT_DOMAIN) {
cannam@64 395 if (adapter->getInputDomain() == Plugin::FrequencyDomain) {
cannam@64 396 adapter = new PluginInputDomainAdapter(adapter);
cannam@64 397 }
cannam@64 398 }
cannam@64 399
cannam@92 400 if (adapterFlags & ADAPT_BUFFER_SIZE) {
cannam@92 401 adapter = new PluginBufferingAdapter(adapter);
cannam@92 402 }
cannam@92 403
cannam@64 404 if (adapterFlags & ADAPT_CHANNEL_COUNT) {
cannam@64 405 adapter = new PluginChannelAdapter(adapter);
cannam@64 406 }
cannam@64 407
cannam@64 408 return adapter;
cannam@64 409 }
cannam@64 410
cannam@64 411 ++index;
cannam@64 412 }
cannam@64 413
cannam@64 414 cerr << "Vamp::HostExt::PluginLoader: Plugin \""
cannam@64 415 << identifier << "\" not found in library \""
cannam@64 416 << fullPath << "\"" << endl;
cannam@64 417
cannam@64 418 return 0;
cannam@64 419 }
cannam@64 420
cannam@64 421 void
cannam@69 422 PluginLoader::Impl::generateTaxonomy()
cannam@64 423 {
cannam@69 424 // cerr << "PluginLoader::Impl::generateTaxonomy" << endl;
cannam@64 425
cannam@64 426 vector<string> path = PluginHostAdapter::getPluginPath();
cannam@64 427 string libfragment = "/lib/";
cannam@64 428 vector<string> catpath;
cannam@64 429
cannam@64 430 string suffix = "cat";
cannam@64 431
cannam@64 432 for (vector<string>::iterator i = path.begin();
cannam@64 433 i != path.end(); ++i) {
cannam@64 434
cannam@64 435 // It doesn't matter that we're using literal forward-slash in
cannam@64 436 // this bit, as it's only relevant if the path contains
cannam@64 437 // "/lib/", which is only meaningful and only plausible on
cannam@64 438 // systems with forward-slash delimiters
cannam@64 439
cannam@64 440 string dir = *i;
cannam@64 441 string::size_type li = dir.find(libfragment);
cannam@64 442
cannam@64 443 if (li != string::npos) {
cannam@64 444 catpath.push_back
cannam@64 445 (dir.substr(0, li)
cannam@64 446 + "/share/"
cannam@64 447 + dir.substr(li + libfragment.length()));
cannam@64 448 }
cannam@64 449
cannam@64 450 catpath.push_back(dir);
cannam@64 451 }
cannam@64 452
cannam@64 453 char buffer[1024];
cannam@64 454
cannam@64 455 for (vector<string>::iterator i = catpath.begin();
cannam@64 456 i != catpath.end(); ++i) {
cannam@64 457
cannam@64 458 vector<string> files = listFiles(*i, suffix);
cannam@64 459
cannam@64 460 for (vector<string>::iterator fi = files.begin();
cannam@64 461 fi != files.end(); ++fi) {
cannam@64 462
cannam@64 463 string filepath = splicePath(*i, *fi);
cannam@64 464 ifstream is(filepath.c_str(), ifstream::in | ifstream::binary);
cannam@64 465
cannam@64 466 if (is.fail()) {
cannam@64 467 // cerr << "failed to open: " << filepath << endl;
cannam@64 468 continue;
cannam@64 469 }
cannam@64 470
cannam@64 471 // cerr << "opened: " << filepath << endl;
cannam@64 472
cannam@64 473 while (!!is.getline(buffer, 1024)) {
cannam@64 474
cannam@64 475 string line(buffer);
cannam@64 476
cannam@64 477 // cerr << "line = " << line << endl;
cannam@64 478
cannam@64 479 string::size_type di = line.find("::");
cannam@64 480 if (di == string::npos) continue;
cannam@64 481
cannam@64 482 string id = line.substr(0, di);
cannam@64 483 string encodedCat = line.substr(di + 2);
cannam@64 484
cannam@64 485 if (id.substr(0, 5) != "vamp:") continue;
cannam@64 486 id = id.substr(5);
cannam@64 487
cannam@64 488 while (encodedCat.length() >= 1 &&
cannam@64 489 encodedCat[encodedCat.length()-1] == '\r') {
cannam@64 490 encodedCat = encodedCat.substr(0, encodedCat.length()-1);
cannam@64 491 }
cannam@64 492
cannam@64 493 // cerr << "id = " << id << ", cat = " << encodedCat << endl;
cannam@64 494
cannam@64 495 PluginCategoryHierarchy category;
cannam@64 496 string::size_type ai;
cannam@64 497 while ((ai = encodedCat.find(" > ")) != string::npos) {
cannam@64 498 category.push_back(encodedCat.substr(0, ai));
cannam@64 499 encodedCat = encodedCat.substr(ai + 3);
cannam@64 500 }
cannam@64 501 if (encodedCat != "") category.push_back(encodedCat);
cannam@64 502
cannam@64 503 m_taxonomy[id] = category;
cannam@64 504 }
cannam@64 505 }
cannam@64 506 }
cannam@64 507 }
cannam@64 508
cannam@64 509 void *
cannam@69 510 PluginLoader::Impl::loadLibrary(string path)
cannam@64 511 {
cannam@64 512 void *handle = 0;
cannam@64 513 #ifdef _WIN32
cannam@64 514 handle = LoadLibrary(path.c_str());
cannam@64 515 if (!handle) {
cannam@64 516 cerr << "Vamp::HostExt::PluginLoader: Unable to load library \""
cannam@64 517 << path << "\"" << endl;
cannam@64 518 }
cannam@64 519 #else
cannam@64 520 handle = dlopen(path.c_str(), RTLD_LAZY);
cannam@64 521 if (!handle) {
cannam@64 522 cerr << "Vamp::HostExt::PluginLoader: Unable to load library \""
cannam@64 523 << path << "\": " << dlerror() << endl;
cannam@64 524 }
cannam@64 525 #endif
cannam@64 526 return handle;
cannam@64 527 }
cannam@64 528
cannam@64 529 void
cannam@69 530 PluginLoader::Impl::unloadLibrary(void *handle)
cannam@64 531 {
cannam@64 532 #ifdef _WIN32
cannam@64 533 FreeLibrary((HINSTANCE)handle);
cannam@64 534 #else
cannam@64 535 dlclose(handle);
cannam@64 536 #endif
cannam@64 537 }
cannam@64 538
cannam@64 539 void *
cannam@69 540 PluginLoader::Impl::lookupInLibrary(void *handle, const char *symbol)
cannam@64 541 {
cannam@64 542 #ifdef _WIN32
cannam@64 543 return (void *)GetProcAddress((HINSTANCE)handle, symbol);
cannam@64 544 #else
cannam@64 545 return (void *)dlsym(handle, symbol);
cannam@64 546 #endif
cannam@64 547 }
cannam@64 548
cannam@64 549 string
cannam@69 550 PluginLoader::Impl::splicePath(string a, string b)
cannam@64 551 {
cannam@64 552 #ifdef _WIN32
cannam@64 553 return a + "\\" + b;
cannam@64 554 #else
cannam@64 555 return a + "/" + b;
cannam@64 556 #endif
cannam@64 557 }
cannam@64 558
cannam@64 559 vector<string>
cannam@69 560 PluginLoader::Impl::listFiles(string dir, string extension)
cannam@64 561 {
cannam@64 562 vector<string> files;
cannam@64 563
cannam@64 564 #ifdef _WIN32
cannam@64 565
cannam@64 566 string expression = dir + "\\*." + extension;
cannam@64 567 WIN32_FIND_DATA data;
cannam@64 568 HANDLE fh = FindFirstFile(expression.c_str(), &data);
cannam@64 569 if (fh == INVALID_HANDLE_VALUE) return files;
cannam@64 570
cannam@64 571 bool ok = true;
cannam@64 572 while (ok) {
cannam@64 573 files.push_back(data.cFileName);
cannam@64 574 ok = FindNextFile(fh, &data);
cannam@64 575 }
cannam@64 576
cannam@64 577 FindClose(fh);
cannam@64 578
cannam@64 579 #else
cannam@78 580
cannam@78 581 size_t extlen = extension.length();
cannam@64 582 DIR *d = opendir(dir.c_str());
cannam@64 583 if (!d) return files;
cannam@64 584
cannam@64 585 struct dirent *e = 0;
cannam@64 586 while ((e = readdir(d))) {
cannam@97 587
cannam@97 588 if (!(e->d_type & DT_REG) && (e->d_type != DT_UNKNOWN)) continue;
cannam@64 589
cannam@97 590 if (!e->d_name) continue;
cannam@97 591
cannam@64 592 size_t len = strlen(e->d_name);
cannam@64 593 if (len < extlen + 2 ||
cannam@64 594 e->d_name + len - extlen - 1 != "." + extension) {
cannam@64 595 continue;
cannam@64 596 }
cannam@64 597
cannam@64 598 files.push_back(e->d_name);
cannam@64 599 }
cannam@64 600
cannam@64 601 closedir(d);
cannam@64 602 #endif
cannam@64 603
cannam@64 604 return files;
cannam@64 605 }
cannam@64 606
cannam@64 607 void
cannam@69 608 PluginLoader::Impl::pluginDeleted(PluginDeletionNotifyAdapter *adapter)
cannam@64 609 {
cannam@64 610 void *handle = m_pluginLibraryHandleMap[adapter];
cannam@64 611 if (handle) unloadLibrary(handle);
cannam@64 612 m_pluginLibraryHandleMap.erase(adapter);
cannam@64 613 }
cannam@64 614
cannam@69 615 PluginLoader::Impl::PluginDeletionNotifyAdapter::PluginDeletionNotifyAdapter(Plugin *plugin,
cannam@69 616 Impl *loader) :
cannam@64 617 PluginWrapper(plugin),
cannam@64 618 m_loader(loader)
cannam@64 619 {
cannam@64 620 }
cannam@64 621
cannam@69 622 PluginLoader::Impl::PluginDeletionNotifyAdapter::~PluginDeletionNotifyAdapter()
cannam@64 623 {
cannam@64 624 // We need to delete the plugin before calling pluginDeleted, as
cannam@64 625 // the delete call may require calling through to the descriptor
cannam@64 626 // (for e.g. cleanup) but pluginDeleted may unload the required
cannam@64 627 // library for the call. To prevent a double deletion when our
cannam@64 628 // parent's destructor runs (after this one), be sure to set
cannam@64 629 // m_plugin to 0 after deletion.
cannam@64 630 delete m_plugin;
cannam@64 631 m_plugin = 0;
cannam@64 632
cannam@64 633 if (m_loader) m_loader->pluginDeleted(this);
cannam@64 634 }
cannam@64 635
cannam@64 636 }
cannam@64 637
cannam@64 638 }