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151 lines
3.7 KiB
151 lines
3.7 KiB
/*
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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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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <config.h>
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#include "startupmanager.h"
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#include "extensionloader.h"
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#include "debug.h"
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#include <iostream>
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using namespace std;
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using namespace Arts;
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/*
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* StartupClass implementation
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*/
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StartupClass::StartupClass()
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{
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StartupManager::add(this);
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}
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void StartupClass::shutdown()
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{
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// shutdown is optional, startup is mandatory
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}
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/*
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* StartupManager implementation
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*/
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list<StartupClass *> *StartupManager::startupClasses = 0;
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ExtensionLoader *StartupManager::activeExtensionLoader = 0;
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bool StartupManager::running = false;
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void StartupManager::add(StartupClass *sc)
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{
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if(activeExtensionLoader)
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{
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activeExtensionLoader->addStartupClass(sc);
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}
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else
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{
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if(running)
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{
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/*
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* the problem with adding a StartupClass when we're already running
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* is that we can't execute the startup() function immediately (for
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* this might break the dependancy of the StartupClass on other
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* globally constructed objects)
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*
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* so will never execute it, which is likely to break something
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* else (i.e. implementations defined in the library the startup
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* class is contained in can't be found)
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*
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* usually, this warning is triggered when an application
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* dynamically loads a library containing StartupClasses, without
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* libmcop knowing about it
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*/
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arts_warning("MCOP StartupManager: adding a StartupClass after Dispatcher init will not work.");
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}
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if(!startupClasses) startupClasses = new list<StartupClass *>;
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startupClasses->push_back(sc);
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}
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}
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void StartupManager::setExtensionLoader(ExtensionLoader *extension)
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{
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/*
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* this is not reentrant: you can't load two extensions at the same time,
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* and it is impossible that an extension loads an extension while being
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* loaded (nothing forbids you to load another extension from an extension
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* in a StartupClass or any time later - just don't do it while being
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* lt_dlopen()d
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*/
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if(activeExtensionLoader)
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arts_assert(extension == 0);
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else
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arts_assert(extension != 0);
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activeExtensionLoader = extension;
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}
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void StartupManager::startup()
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{
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arts_return_if_fail(running == false);
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running = true;
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if(startupClasses)
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{
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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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}
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}
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void StartupManager::shutdown()
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{
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arts_return_if_fail(running == true);
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running = false;
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if(startupClasses)
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{
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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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}
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}
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void StartupManager::internalFreeAll()
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{
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if(startupClasses)
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{
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startupClasses->erase(startupClasses->begin(),startupClasses->end());
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delete startupClasses;
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startupClasses = 0;
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}
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}
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namespace Arts {
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static class StartupManagerFree {
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public:
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~StartupManagerFree() { StartupManager::internalFreeAll(); }
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} The_StartupManagerFree;
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}
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