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/*
Copyright (C) 2000 Stefan Westerfeld
stefan@space.twc.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include "startupmanager.h"
#include "extensionloader.h"
#include "debug.h"
#include <iostream>
using namespace std;
using namespace Arts;
/*
* StartupClass implementation
*/
StartupClass::StartupClass()
{
StartupManager::add(this);
}
void StartupClass::shutdown()
{
// shutdown is optional, startup is mandatory
}
/*
* StartupManager implementation
*/
list<StartupClass *> *StartupManager::startupClasses = 0;
ExtensionLoader *StartupManager::activeExtensionLoader = 0;
bool StartupManager::running = false;
void StartupManager::add(StartupClass *sc)
{
if(activeExtensionLoader)
{
activeExtensionLoader->addStartupClass(sc);
}
else
{
if(running)
{
/*
* the problem with adding a StartupClass when we're already running
* is that we can't execute the startup() function immediately (for
* this might break the dependancy of the StartupClass on other
* globally constructed objects)
*
* so will never execute it, which is likely to break something
* else (i.e. implementations defined in the library the startup
* class is contained in can't be found)
*
* usually, this warning is triggered when an application
* dynamically loads a library containing StartupClasses, without
* libmcop knowing about it
*/
arts_warning("MCOP StartupManager: adding a StartupClass after Dispatcher init will not work.");
}
if(!startupClasses) startupClasses = new list<StartupClass *>;
startupClasses->push_back(sc);
}
}
void StartupManager::setExtensionLoader(ExtensionLoader *extension)
{
/*
* this is not reentrant: you can't load two extensions at the same time,
* and it is impossible that an extension loads an extension while being
* loaded (nothing forbids you to load another extension from an extension
* in a StartupClass or any time later - just don't do it while being
* lt_dlopen()d
*/
if(activeExtensionLoader)
arts_assert(extension == 0);
else
arts_assert(extension != 0);
activeExtensionLoader = extension;
}
void StartupManager::startup()
{
arts_return_if_fail(running == false);
running = true;
if(startupClasses)
{
list<StartupClass *>::iterator i;
for(i = startupClasses->begin(); i != startupClasses->end(); i++)
(*i)->startup();
}
}
void StartupManager::shutdown()
{
arts_return_if_fail(running == true);
running = false;
if(startupClasses)
{
list<StartupClass *>::iterator i;
for(i = startupClasses->begin(); i != startupClasses->end(); i++)
(*i)->shutdown();
}
}
void StartupManager::internalFreeAll()
{
if(startupClasses)
{
startupClasses->erase(startupClasses->begin(),startupClasses->end());
delete startupClasses;
startupClasses = 0;
}
}
namespace Arts {
static class StartupManagerFree {
public:
~StartupManagerFree() { StartupManager::internalFreeAll(); }
} The_StartupManagerFree;
}
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