cannam@227: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@227: 
cannam@227: /*
cannam@227:     Vamp
cannam@227: 
cannam@227:     An API for audio analysis and feature extraction plugins.
cannam@227: 
cannam@227:     Centre for Digital Music, Queen Mary, University of London.
cannam@227:     Copyright 2006-2007 Chris Cannam and QMUL.
cannam@227:   
cannam@227:     Permission is hereby granted, free of charge, to any person
cannam@227:     obtaining a copy of this software and associated documentation
cannam@227:     files (the "Software"), to deal in the Software without
cannam@227:     restriction, including without limitation the rights to use, copy,
cannam@227:     modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@227:     of the Software, and to permit persons to whom the Software is
cannam@227:     furnished to do so, subject to the following conditions:
cannam@227: 
cannam@227:     The above copyright notice and this permission notice shall be
cannam@227:     included in all copies or substantial portions of the Software.
cannam@227: 
cannam@227:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@227:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@227:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@227:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
cannam@227:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@227:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@227:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@227: 
cannam@227:     Except as contained in this notice, the names of the Centre for
cannam@227:     Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@227:     shall not be used in advertising or otherwise to promote the sale,
cannam@227:     use or other dealings in this Software without prior written
cannam@227:     authorization.
cannam@227: */
cannam@227: 
cannam@227: #include "vamp-sdk/PluginHostAdapter.h"
cannam@227: #include "PluginLoader.h"
cannam@227: #include "PluginInputDomainAdapter.h"
cannam@227: #include "PluginChannelAdapter.h"
cannam@227: #include "PluginBufferingAdapter.h"
cannam@227: 
cannam@227: #include <fstream>
cannam@227: #include <cctype> // tolower
cannam@227: 
cannam@227: #include <cstring>
cannam@227: 
cannam@227: #ifdef _WIN32
cannam@227: 
cannam@227: #include <windows.h>
cannam@227: #include <tchar.h>
cannam@227: #define PLUGIN_SUFFIX "dll"
cannam@227: 
cannam@227: #else /* ! _WIN32 */
cannam@227: 
cannam@227: #include <dirent.h>
cannam@227: #include <dlfcn.h>
cannam@227: 
cannam@227: #ifdef __APPLE__
cannam@227: #define PLUGIN_SUFFIX "dylib"
cannam@227: #else /* ! __APPLE__ */
cannam@227: #define PLUGIN_SUFFIX "so"
cannam@227: #endif /* ! __APPLE__ */
cannam@227: 
cannam@227: #endif /* ! _WIN32 */
cannam@227: 
cannam@227: using namespace std;
cannam@227: 
cannam@227: namespace Vamp {
cannam@227: 	
cannam@227: namespace HostExt {
cannam@227: 
cannam@227: class PluginLoader::Impl
cannam@227: {
cannam@227: public:
cannam@227:     Impl();
cannam@227:     virtual ~Impl();
cannam@227: 
cannam@227:     PluginKeyList listPlugins();
cannam@227: 
cannam@227:     Plugin *loadPlugin(PluginKey key,
cannam@227:                        float inputSampleRate,
cannam@227:                        int adapterFlags);
cannam@227: 
cannam@227:     PluginKey composePluginKey(string libraryName, string identifier);
cannam@227: 
cannam@227:     PluginCategoryHierarchy getPluginCategory(PluginKey key);
cannam@227: 
cannam@227:     string getLibraryPathForPlugin(PluginKey key);
cannam@227: 
cannam@227:     static void setInstanceToClean(PluginLoader *instance);
cannam@227: 
cannam@227: protected:
cannam@227:     class PluginDeletionNotifyAdapter : public PluginWrapper {
cannam@227:     public:
cannam@227:         PluginDeletionNotifyAdapter(Plugin *plugin, Impl *loader);
cannam@227:         virtual ~PluginDeletionNotifyAdapter();
cannam@227:     protected:
cannam@227:         Impl *m_loader;
cannam@227:     };
cannam@227: 
cannam@227:     class InstanceCleaner {
cannam@227:     public:
cannam@227:         InstanceCleaner() : m_instance(0) { }
cannam@227:         ~InstanceCleaner() { delete m_instance; }
cannam@227:         void setInstance(PluginLoader *instance) { m_instance = instance; }
cannam@227:     protected:
cannam@227:         PluginLoader *m_instance;
cannam@227:     };
cannam@227: 
cannam@227:     virtual void pluginDeleted(PluginDeletionNotifyAdapter *adapter);
cannam@227: 
cannam@227:     map<PluginKey, string> m_pluginLibraryNameMap;
cannam@227:     bool m_allPluginsEnumerated;
cannam@227:     void enumeratePlugins(PluginKey forPlugin = "");
cannam@227: 
cannam@227:     map<PluginKey, PluginCategoryHierarchy> m_taxonomy;
cannam@227:     void generateTaxonomy();
cannam@227: 
cannam@227:     map<Plugin *, void *> m_pluginLibraryHandleMap;
cannam@227: 
cannam@227:     bool decomposePluginKey(PluginKey key,
cannam@227:                             string &libraryName, string &identifier);
cannam@227: 
cannam@227:     void *loadLibrary(string path);
cannam@227:     void unloadLibrary(void *handle);
cannam@227:     void *lookupInLibrary(void *handle, const char *symbol);
cannam@227: 
cannam@227:     string splicePath(string a, string b);
cannam@227:     vector<string> listFiles(string dir, string ext);
cannam@227:     
cannam@227:     static InstanceCleaner m_cleaner;
cannam@227: };
cannam@227: 
cannam@227: PluginLoader *
cannam@227: PluginLoader::m_instance = 0;
cannam@227: 
cannam@227: PluginLoader::Impl::InstanceCleaner
cannam@227: PluginLoader::Impl::m_cleaner;
cannam@227: 
cannam@227: PluginLoader::PluginLoader()
cannam@227: {
cannam@227:     m_impl = new Impl();
cannam@227: }
cannam@227: 
cannam@227: PluginLoader::~PluginLoader()
cannam@227: {
cannam@227:     delete m_impl;
cannam@227: }
cannam@227: 
cannam@227: PluginLoader *
cannam@227: PluginLoader::getInstance()
cannam@227: {
cannam@227:     if (!m_instance) {
cannam@227:         // The cleaner doesn't own the instance, because we leave the
cannam@227:         // instance pointer in the base class for binary backwards
cannam@227:         // compatibility reasons and to avoid waste
cannam@227:         m_instance = new PluginLoader();
cannam@227:         Impl::setInstanceToClean(m_instance);
cannam@227:     }
cannam@227:     return m_instance;
cannam@227: }
cannam@227: 
cannam@227: vector<PluginLoader::PluginKey>
cannam@227: PluginLoader::listPlugins() 
cannam@227: {
cannam@227:     return m_impl->listPlugins();
cannam@227: }
cannam@227: 
cannam@227: Plugin *
cannam@227: PluginLoader::loadPlugin(PluginKey key,
cannam@227:                          float inputSampleRate,
cannam@227:                          int adapterFlags)
cannam@227: {
cannam@227:     return m_impl->loadPlugin(key, inputSampleRate, adapterFlags);
cannam@227: }
cannam@227: 
cannam@227: PluginLoader::PluginKey
cannam@227: PluginLoader::composePluginKey(string libraryName, string identifier) 
cannam@227: {
cannam@227:     return m_impl->composePluginKey(libraryName, identifier);
cannam@227: }
cannam@227: 
cannam@227: PluginLoader::PluginCategoryHierarchy
cannam@227: PluginLoader::getPluginCategory(PluginKey key)
cannam@227: {
cannam@227:     return m_impl->getPluginCategory(key);
cannam@227: }
cannam@227: 
cannam@227: string
cannam@227: PluginLoader::getLibraryPathForPlugin(PluginKey key)
cannam@227: {
cannam@227:     return m_impl->getLibraryPathForPlugin(key);
cannam@227: }
cannam@227:  
cannam@227: PluginLoader::Impl::Impl() :
cannam@227:     m_allPluginsEnumerated(false)
cannam@227: {
cannam@227: }
cannam@227: 
cannam@227: PluginLoader::Impl::~Impl()
cannam@227: {
cannam@227: }
cannam@227: 
cannam@227: void
cannam@227: PluginLoader::Impl::setInstanceToClean(PluginLoader *instance)
cannam@227: {
cannam@227:     m_cleaner.setInstance(instance);
cannam@227: }
cannam@227: 
cannam@227: vector<PluginLoader::PluginKey>
cannam@227: PluginLoader::Impl::listPlugins() 
cannam@227: {
cannam@227:     if (!m_allPluginsEnumerated) enumeratePlugins();
cannam@227: 
cannam@227:     vector<PluginKey> plugins;
cannam@227:     for (map<PluginKey, string>::iterator mi = m_pluginLibraryNameMap.begin();
cannam@227:          mi != m_pluginLibraryNameMap.end(); ++mi) {
cannam@227:         plugins.push_back(mi->first);
cannam@227:     }
cannam@227: 
cannam@227:     return plugins;
cannam@227: }
cannam@227: 
cannam@227: void
cannam@227: PluginLoader::Impl::enumeratePlugins(PluginKey forPlugin)
cannam@227: {
cannam@227:     vector<string> path = PluginHostAdapter::getPluginPath();
cannam@227: 
cannam@227:     string libraryName, identifier;
cannam@227:     if (forPlugin != "") {
cannam@227:         if (!decomposePluginKey(forPlugin, libraryName, identifier)) {
cannam@227:             std::cerr << "WARNING: Vamp::HostExt::PluginLoader: Invalid plugin key \""
cannam@227:                       << forPlugin << "\" in enumerate" << std::endl;
cannam@227:             return;
cannam@227:         }
cannam@227:     }
cannam@227: 
cannam@227:     for (size_t i = 0; i < path.size(); ++i) {
cannam@227:         
cannam@227:         vector<string> files = listFiles(path[i], PLUGIN_SUFFIX);
cannam@227: 
cannam@227:         for (vector<string>::iterator fi = files.begin();
cannam@227:              fi != files.end(); ++fi) {
cannam@227:             
cannam@227:             if (libraryName != "") {
cannam@227:                 // libraryName is lowercased and lacking an extension,
cannam@227:                 // as it came from the plugin key
cannam@227:                 string temp = *fi;
cannam@227:                 for (size_t i = 0; i < temp.length(); ++i) {
cannam@227:                     temp[i] = tolower(temp[i]);
cannam@227:                 }
cannam@227:                 string::size_type pi = temp.find('.');
cannam@227:                 if (pi == string::npos) {
cannam@227:                     if (libraryName != temp) continue;
cannam@227:                 } else {
cannam@227:                     if (libraryName != temp.substr(0, pi)) continue;
cannam@227:                 }
cannam@227:             }
cannam@227: 
cannam@227:             string fullPath = path[i];
cannam@227:             fullPath = splicePath(fullPath, *fi);
cannam@227:             void *handle = loadLibrary(fullPath);
cannam@227:             if (!handle) continue;
cannam@227:             
cannam@227:             VampGetPluginDescriptorFunction fn =
cannam@227:                 (VampGetPluginDescriptorFunction)lookupInLibrary
cannam@227:                 (handle, "vampGetPluginDescriptor");
cannam@227:             
cannam@227:             if (!fn) {
cannam@227:                 unloadLibrary(handle);
cannam@227:                 continue;
cannam@227:             }
cannam@227:             
cannam@227:             int index = 0;
cannam@227:             const VampPluginDescriptor *descriptor = 0;
cannam@227:             
cannam@227:             while ((descriptor = fn(VAMP_API_VERSION, index))) {
cannam@227:                 ++index;
cannam@227:                 if (identifier != "") {
cannam@227:                     if (descriptor->identifier != identifier) continue;
cannam@227:                 }
cannam@227:                 PluginKey key = composePluginKey(*fi, descriptor->identifier);
cannam@227: //                std::cerr << "enumerate: " << key << " (path: " << fullPath << ")" << std::endl;
cannam@227:                 if (m_pluginLibraryNameMap.find(key) ==
cannam@227:                     m_pluginLibraryNameMap.end()) {
cannam@227:                     m_pluginLibraryNameMap[key] = fullPath;
cannam@227:                 }
cannam@227:             }
cannam@227:             
cannam@227:             unloadLibrary(handle);
cannam@227:         }
cannam@227:     }
cannam@227: 
cannam@227:     if (forPlugin == "") m_allPluginsEnumerated = true;
cannam@227: }
cannam@227: 
cannam@227: PluginLoader::PluginKey
cannam@227: PluginLoader::Impl::composePluginKey(string libraryName, string identifier)
cannam@227: {
cannam@227:     string basename = libraryName;
cannam@227: 
cannam@227:     string::size_type li = basename.rfind('/');
cannam@227:     if (li != string::npos) basename = basename.substr(li + 1);
cannam@227: 
cannam@227:     li = basename.find('.');
cannam@227:     if (li != string::npos) basename = basename.substr(0, li);
cannam@227: 
cannam@227:     for (size_t i = 0; i < basename.length(); ++i) {
cannam@227:         basename[i] = tolower(basename[i]);
cannam@227:     }
cannam@227: 
cannam@227:     return basename + ":" + identifier;
cannam@227: }
cannam@227: 
cannam@227: bool
cannam@227: PluginLoader::Impl::decomposePluginKey(PluginKey key,
cannam@227:                                        string &libraryName,
cannam@227:                                        string &identifier)
cannam@227: {
cannam@227:     string::size_type ki = key.find(':');
cannam@227:     if (ki == string::npos) {
cannam@227:         return false;
cannam@227:     }
cannam@227: 
cannam@227:     libraryName = key.substr(0, ki);
cannam@227:     identifier = key.substr(ki + 1);
cannam@227:     return true;
cannam@227: }
cannam@227: 
cannam@227: PluginLoader::PluginCategoryHierarchy
cannam@227: PluginLoader::Impl::getPluginCategory(PluginKey plugin)
cannam@227: {
cannam@227:     if (m_taxonomy.empty()) generateTaxonomy();
cannam@227:     if (m_taxonomy.find(plugin) == m_taxonomy.end()) {
cannam@227:         return PluginCategoryHierarchy();
cannam@227:     }
cannam@227:     return m_taxonomy[plugin];
cannam@227: }
cannam@227: 
cannam@227: string
cannam@227: PluginLoader::Impl::getLibraryPathForPlugin(PluginKey plugin)
cannam@227: {
cannam@227:     if (m_pluginLibraryNameMap.find(plugin) == m_pluginLibraryNameMap.end()) {
cannam@227:         if (m_allPluginsEnumerated) return "";
cannam@227:         enumeratePlugins(plugin);
cannam@227:     }
cannam@227:     if (m_pluginLibraryNameMap.find(plugin) == m_pluginLibraryNameMap.end()) {
cannam@227:         return "";
cannam@227:     }
cannam@227:     return m_pluginLibraryNameMap[plugin];
cannam@227: }    
cannam@227: 
cannam@227: Plugin *
cannam@227: PluginLoader::Impl::loadPlugin(PluginKey key,
cannam@227:                                float inputSampleRate, int adapterFlags)
cannam@227: {
cannam@227:     string libname, identifier;
cannam@227:     if (!decomposePluginKey(key, libname, identifier)) {
cannam@227:         std::cerr << "Vamp::HostExt::PluginLoader: Invalid plugin key \""
cannam@227:                   << key << "\" in loadPlugin" << std::endl;
cannam@227:         return 0;
cannam@227:     }
cannam@227:         
cannam@227:     string fullPath = getLibraryPathForPlugin(key);
cannam@227:     if (fullPath == "") return 0;
cannam@227:     
cannam@227:     void *handle = loadLibrary(fullPath);
cannam@227:     if (!handle) return 0;
cannam@227:     
cannam@227:     VampGetPluginDescriptorFunction fn =
cannam@227:         (VampGetPluginDescriptorFunction)lookupInLibrary
cannam@227:         (handle, "vampGetPluginDescriptor");
cannam@227: 
cannam@227:     if (!fn) {
cannam@227:         unloadLibrary(handle);
cannam@227:         return 0;
cannam@227:     }
cannam@227: 
cannam@227:     int index = 0;
cannam@227:     const VampPluginDescriptor *descriptor = 0;
cannam@227: 
cannam@227:     while ((descriptor = fn(VAMP_API_VERSION, index))) {
cannam@227: 
cannam@227:         if (string(descriptor->identifier) == identifier) {
cannam@227: 
cannam@227:             Vamp::PluginHostAdapter *plugin =
cannam@227:                 new Vamp::PluginHostAdapter(descriptor, inputSampleRate);
cannam@227: 
cannam@227:             Plugin *adapter = new PluginDeletionNotifyAdapter(plugin, this);
cannam@227: 
cannam@227:             m_pluginLibraryHandleMap[adapter] = handle;
cannam@227: 
cannam@227:             if (adapterFlags & ADAPT_INPUT_DOMAIN) {
cannam@227:                 if (adapter->getInputDomain() == Plugin::FrequencyDomain) {
cannam@227:                     adapter = new PluginInputDomainAdapter(adapter);
cannam@227:                 }
cannam@227:             }
cannam@227: 
cannam@227:             if (adapterFlags & ADAPT_BUFFER_SIZE) {
cannam@227:                 adapter = new PluginBufferingAdapter(adapter);
cannam@227:             }
cannam@227: 
cannam@227:             if (adapterFlags & ADAPT_CHANNEL_COUNT) {
cannam@227:                 adapter = new PluginChannelAdapter(adapter);
cannam@227:             }
cannam@227: 
cannam@227:             return adapter;
cannam@227:         }
cannam@227: 
cannam@227:         ++index;
cannam@227:     }
cannam@227: 
cannam@227:     cerr << "Vamp::HostExt::PluginLoader: Plugin \""
cannam@227:          << identifier << "\" not found in library \""
cannam@227:          << fullPath << "\"" << endl;
cannam@227: 
cannam@227:     return 0;
cannam@227: }
cannam@227: 
cannam@227: void
cannam@227: PluginLoader::Impl::generateTaxonomy()
cannam@227: {
cannam@227: //    cerr << "PluginLoader::Impl::generateTaxonomy" << endl;
cannam@227: 
cannam@227:     vector<string> path = PluginHostAdapter::getPluginPath();
cannam@227:     string libfragment = "/lib/";
cannam@227:     vector<string> catpath;
cannam@227: 
cannam@227:     string suffix = "cat";
cannam@227: 
cannam@227:     for (vector<string>::iterator i = path.begin();
cannam@227:          i != path.end(); ++i) {
cannam@227: 
cannam@227:         // It doesn't matter that we're using literal forward-slash in
cannam@227:         // this bit, as it's only relevant if the path contains
cannam@227:         // "/lib/", which is only meaningful and only plausible on
cannam@227:         // systems with forward-slash delimiters
cannam@227:         
cannam@227:         string dir = *i;
cannam@227:         string::size_type li = dir.find(libfragment);
cannam@227: 
cannam@227:         if (li != string::npos) {
cannam@227:             catpath.push_back
cannam@227:                 (dir.substr(0, li)
cannam@227:                  + "/share/"
cannam@227:                  + dir.substr(li + libfragment.length()));
cannam@227:         }
cannam@227: 
cannam@227:         catpath.push_back(dir);
cannam@227:     }
cannam@227: 
cannam@227:     char buffer[1024];
cannam@227: 
cannam@227:     for (vector<string>::iterator i = catpath.begin();
cannam@227:          i != catpath.end(); ++i) {
cannam@227:         
cannam@227:         vector<string> files = listFiles(*i, suffix);
cannam@227: 
cannam@227:         for (vector<string>::iterator fi = files.begin();
cannam@227:              fi != files.end(); ++fi) {
cannam@227: 
cannam@227:             string filepath = splicePath(*i, *fi);
cannam@227:             ifstream is(filepath.c_str(), ifstream::in | ifstream::binary);
cannam@227: 
cannam@227:             if (is.fail()) {
cannam@227: //                cerr << "failed to open: " << filepath << endl;
cannam@227:                 continue;
cannam@227:             }
cannam@227: 
cannam@227: //            cerr << "opened: " << filepath << endl;
cannam@227: 
cannam@227:             while (!!is.getline(buffer, 1024)) {
cannam@227: 
cannam@227:                 string line(buffer);
cannam@227: 
cannam@227: //                cerr << "line = " << line << endl;
cannam@227: 
cannam@227:                 string::size_type di = line.find("::");
cannam@227:                 if (di == string::npos) continue;
cannam@227: 
cannam@227:                 string id = line.substr(0, di);
cannam@227:                 string encodedCat = line.substr(di + 2);
cannam@227: 
cannam@227:                 if (id.substr(0, 5) != "vamp:") continue;
cannam@227:                 id = id.substr(5);
cannam@227: 
cannam@227:                 while (encodedCat.length() >= 1 &&
cannam@227:                        encodedCat[encodedCat.length()-1] == '\r') {
cannam@227:                     encodedCat = encodedCat.substr(0, encodedCat.length()-1);
cannam@227:                 }
cannam@227: 
cannam@227: //                cerr << "id = " << id << ", cat = " << encodedCat << endl;
cannam@227: 
cannam@227:                 PluginCategoryHierarchy category;
cannam@227:                 string::size_type ai;
cannam@227:                 while ((ai = encodedCat.find(" > ")) != string::npos) {
cannam@227:                     category.push_back(encodedCat.substr(0, ai));
cannam@227:                     encodedCat = encodedCat.substr(ai + 3);
cannam@227:                 }
cannam@227:                 if (encodedCat != "") category.push_back(encodedCat);
cannam@227: 
cannam@227:                 m_taxonomy[id] = category;
cannam@227:             }
cannam@227:         }
cannam@227:     }
cannam@227: }    
cannam@227: 
cannam@227: void *
cannam@227: PluginLoader::Impl::loadLibrary(string path)
cannam@227: {
cannam@227:     void *handle = 0;
cannam@227: #ifdef _WIN32
cannam@227:     handle = LoadLibrary(path.c_str());
cannam@227:     if (!handle) {
cannam@227:         cerr << "Vamp::HostExt::PluginLoader: Unable to load library \""
cannam@227:              << path << "\"" << endl;
cannam@227:     }
cannam@227: #else
cannam@227:     handle = dlopen(path.c_str(), RTLD_LAZY | RTLD_LOCAL);
cannam@227:     if (!handle) {
cannam@227:         cerr << "Vamp::HostExt::PluginLoader: Unable to load library \""
cannam@227:              << path << "\": " << dlerror() << endl;
cannam@227:     }
cannam@227: #endif
cannam@227:     return handle;
cannam@227: }
cannam@227: 
cannam@227: void
cannam@227: PluginLoader::Impl::unloadLibrary(void *handle)
cannam@227: {
cannam@227: #ifdef _WIN32
cannam@227:     FreeLibrary((HINSTANCE)handle);
cannam@227: #else
cannam@227:     dlclose(handle);
cannam@227: #endif
cannam@227: }
cannam@227: 
cannam@227: void *
cannam@227: PluginLoader::Impl::lookupInLibrary(void *handle, const char *symbol)
cannam@227: {
cannam@227: #ifdef _WIN32
cannam@227:     return (void *)GetProcAddress((HINSTANCE)handle, symbol);
cannam@227: #else
cannam@227:     return (void *)dlsym(handle, symbol);
cannam@227: #endif
cannam@227: }
cannam@227: 
cannam@227: string
cannam@227: PluginLoader::Impl::splicePath(string a, string b)
cannam@227: {
cannam@227: #ifdef _WIN32
cannam@227:     return a + "\\" + b;
cannam@227: #else
cannam@227:     return a + "/" + b;
cannam@227: #endif
cannam@227: }
cannam@227: 
cannam@227: vector<string>
cannam@227: PluginLoader::Impl::listFiles(string dir, string extension)
cannam@227: {
cannam@227:     vector<string> files;
cannam@227: 
cannam@227: #ifdef _WIN32
cannam@227: 
cannam@227:     string expression = dir + "\\*." + extension;
cannam@227:     WIN32_FIND_DATA data;
cannam@227:     HANDLE fh = FindFirstFile(expression.c_str(), &data);
cannam@227:     if (fh == INVALID_HANDLE_VALUE) return files;
cannam@227: 
cannam@227:     bool ok = true;
cannam@227:     while (ok) {
cannam@227:         files.push_back(data.cFileName);
cannam@227:         ok = FindNextFile(fh, &data);
cannam@227:     }
cannam@227: 
cannam@227:     FindClose(fh);
cannam@227: 
cannam@227: #else
cannam@227: 
cannam@227:     size_t extlen = extension.length();
cannam@227:     DIR *d = opendir(dir.c_str());
cannam@227:     if (!d) return files;
cannam@227:             
cannam@227:     struct dirent *e = 0;
cannam@227:     while ((e = readdir(d))) {
cannam@227:  
cannam@227:         if (!e->d_name) continue;
cannam@227:        
cannam@227:         size_t len = strlen(e->d_name);
cannam@227:         if (len < extlen + 2 ||
cannam@227:             e->d_name + len - extlen - 1 != "." + extension) {
cannam@227:             continue;
cannam@227:         }
cannam@227: 
cannam@227:         files.push_back(e->d_name);
cannam@227:     }
cannam@227: 
cannam@227:     closedir(d);
cannam@227: #endif
cannam@227: 
cannam@227:     return files;
cannam@227: }
cannam@227: 
cannam@227: void
cannam@227: PluginLoader::Impl::pluginDeleted(PluginDeletionNotifyAdapter *adapter)
cannam@227: {
cannam@227:     void *handle = m_pluginLibraryHandleMap[adapter];
cannam@227:     if (handle) unloadLibrary(handle);
cannam@227:     m_pluginLibraryHandleMap.erase(adapter);
cannam@227: }
cannam@227: 
cannam@227: PluginLoader::Impl::PluginDeletionNotifyAdapter::PluginDeletionNotifyAdapter(Plugin *plugin,
cannam@227:                                                                              Impl *loader) :
cannam@227:     PluginWrapper(plugin),
cannam@227:     m_loader(loader)
cannam@227: {
cannam@227: }
cannam@227: 
cannam@227: PluginLoader::Impl::PluginDeletionNotifyAdapter::~PluginDeletionNotifyAdapter()
cannam@227: {
cannam@227:     // We need to delete the plugin before calling pluginDeleted, as
cannam@227:     // the delete call may require calling through to the descriptor
cannam@227:     // (for e.g. cleanup) but pluginDeleted may unload the required
cannam@227:     // library for the call.  To prevent a double deletion when our
cannam@227:     // parent's destructor runs (after this one), be sure to set
cannam@227:     // m_plugin to 0 after deletion.
cannam@227:     delete m_plugin;
cannam@227:     m_plugin = 0;
cannam@227: 
cannam@227:     if (m_loader) m_loader->pluginDeleted(this);
cannam@227: }
cannam@227: 
cannam@227: }
cannam@227: 
cannam@227: }