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117 lines
2.7 KiB
117 lines
2.7 KiB
15 years ago
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/*
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Copyright (C) 2000 Stefan Westerfeld
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stefan@space.twc.de
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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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15 years ago
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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15 years ago
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*/
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#include <config.h>
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#include "extensionloader.h"
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#include "startupmanager.h"
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#include "mcoputils.h"
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#include "debug.h"
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#include <unistd.h>
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#include <assert.h>
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using namespace std;
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using namespace Arts;
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ExtensionLoader::ExtensionLoader(const string& filename) :handle(0)
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{
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string dlfilename;
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assert(filename.size());
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if(filename[0] == '/')
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dlfilename = filename;
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else
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{
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const vector<string> *path = MCOPUtils::extensionPath();
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vector<string>::const_iterator pi;
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for(pi = path->begin(); pi != path->end(); pi++)
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{
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dlfilename = *pi + "/" + filename;
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if(access(dlfilename.c_str(),F_OK) == 0)
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break;
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}
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}
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/* this will catch all startup classes here */
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StartupManager::setExtensionLoader(this);
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lt_dlinit();
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handle = lt_dlopen(dlfilename.c_str());
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StartupManager::setExtensionLoader(0);
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if(handle)
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{
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/* now process all startup classes of the loaded extension */
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list<StartupClass *>::iterator i;
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for(i = startupClasses.begin(); i != startupClasses.end(); i++)
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(*i)->startup();
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needShutdown = true;
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}
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else
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{
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arts_warning("loading extension from '%s' failed: %s",
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dlfilename.c_str(), lt_dlerror());
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}
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}
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bool ExtensionLoader::success()
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{
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return (handle != 0);
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}
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void ExtensionLoader::shutdown()
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{
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if(handle && needShutdown)
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{
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/* shutdown the loaded extension properly */
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list<StartupClass *>::iterator i;
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for(i = startupClasses.begin(); i != startupClasses.end(); i++)
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(*i)->shutdown();
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needShutdown = false;
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}
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}
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ExtensionLoader::~ExtensionLoader()
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{
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if(handle)
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{
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shutdown();
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lt_dlclose(handle);
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/*
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* lt_dlexit & lt_dlinit have a counter, so there is no harm in
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* calling one lt_dlinit in the constructor and one lt_dlexit here
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*/
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lt_dlexit();
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}
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}
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void ExtensionLoader::addStartupClass(class StartupClass *sc)
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{
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startupClasses.push_back(sc);
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}
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