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/*
Copyright (C) 2000-2001 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 "notification.h"
#include "debug.h"
#include "dispatcher.h"
using namespace Arts;
void NotificationClient::notify(const Notification&)
{
}
NotificationManager::NotificationManager()
{
arts_assert(!instance);
instance = this;
}
NotificationManager::~NotificationManager()
{
arts_assert(instance);
instance = 0;
}
void NotificationManager::send(Notification wm)
{
if (todo.empty()) {
// HACK: in order to not add a virtual function to IOManager we're calling addTimer with
// magic values. This call tells the ioManager that notifications are pending and
// NotificationManager::run() should get called soon.
Arts::Dispatcher::the()->ioManager()->addTimer(-1, 0);
}
todo.push(wm);
}
bool NotificationManager::run()
{
if(todo.empty()) return false;
while(!todo.empty())
{
Notification wm = todo.front();
todo.pop();
/*
* we'll copy and remove the notification first, to be sure that
* nothing bad happens to it if we rebuild "todo" (for instance in
* removeClient)
*/
wm.receiver->notify(wm);
}
return true;
}
void NotificationManager::removeClient(NotificationClient *client)
{
std::queue<Notification> newTodo;
while(!todo.empty())
{
const Notification& n = todo.front();
if(n.receiver != client)
newTodo.push(n);
else
{
arts_debug("NotificationManager: removing one notification");
NotificationDestroyFunction destroy =
(NotificationDestroyFunction)n.internal;
if(destroy) destroy(n);
}
todo.pop();
}
todo = newTodo;
}
void Notification::setDestroy(NotificationDestroyFunction destroy)
{
internal = (void*)destroy;
}
NotificationManager *NotificationManager::instance = 0;
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