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137 lines
3.2 KiB
137 lines
3.2 KiB
/* aKode: PluginHandler
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Copyright (C) 2004 Allan Sandfeld Jensen <kde@carewolf.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include "akodelib.h"
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#include "pluginhandler.h"
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#include <dirent.h>
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#include <iostream>
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#ifdef HAVE_LIBLTDL
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#include <ltdl.h>
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#else
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#include <dlfcn.h>
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#endif
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#ifdef HAVE_LIBLTDL
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#define DLCLOSE(x) lt_dlclose((lt_dlhandle)(x))
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#define DLERROR() lt_dlerror()
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#define DLSYM(x, y) lt_dlsym((lt_dlhandle)(x), (y))
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#define DLINIT() lt_dlinit()
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#define DLEXIT() lt_dlexit()
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#else
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#define DLCLOSE dlclose
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#define DLERROR dlerror
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#define DLSYM dlsym
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#define DLINIT()
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#define DLEXIT()
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#endif
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namespace aKode {
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PluginHandler::PluginHandler() : library_loaded(false), handle(0)
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{
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DLINIT();
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#ifdef HAVE_LIBLTDL
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lt_dlsetsearchpath(AKODE_SEARCHDIR);
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#endif
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}
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PluginHandler::PluginHandler(const string lib) : library_loaded(false), handle(0)
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{
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DLINIT();
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if (lib.size() > 0)
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load(lib);
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}
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PluginHandler::~PluginHandler()
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{
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unload();
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DLEXIT();
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}
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list<string> PluginHandler::listPlugins() {
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DIR *dir = opendir(AKODE_SEARCHDIR);
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dirent *dp;
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if (!dir) return list<string>();
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list<string> out;
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while ((dp = readdir (dir)) != 0) {
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string name(dp->d_name);
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if (name.length() < 15) continue;
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if (name.substr(0,9) != "libakode_") continue;
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#ifdef HAVE_LIBLTDL
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int p = name.find(".la", 9);
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#else
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int p = name.find(".so", 9);
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#endif
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if (p == -1) continue;
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string plugin = name.substr(9,p-9);
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out.push_back(plugin);
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}
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return out;
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}
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bool PluginHandler::load(const string lib)
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{
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if (library_loaded) return false;
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#ifdef HAVE_LIBLTDL
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const string library = string("libakode_") + lib;
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handle = lt_dlopenext(library.c_str());
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#else
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string library = "libakode_" + lib + ".so";
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handle = dlopen(library.c_str(), RTLD_NOW);
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if (!handle) { // this seems the simplest way to extent the search-path
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library = string(AKODE_SEARCHDIR) +"/"+ library;
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handle = dlopen(library.c_str(), RTLD_NOW);
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}
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#endif
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if (!handle) {
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return false;
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}
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library_loaded = true;
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return true;
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}
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void PluginHandler::unload()
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{
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if (library_loaded) {
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DLCLOSE(handle);
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library_loaded = false;
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}
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}
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void* PluginHandler::loadPlugin(const string name) {
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void *plugin;
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if (!handle) return 0;
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DLERROR(); // clear errors
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plugin = DLSYM(handle, name.c_str());
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if (DLERROR()) return 0;
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return plugin;
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}
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} //namespace
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