notificationcenter.cpp

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// NotificationCenter.cpp
//
// $Id: //poco/Main/Foundation/src/NotificationCenter.cpp#5 $
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#include "Foundation/NotificationCenter.h"
#include "Foundation/Notification.h"
#include "Foundation/Observer.h"
#include "Foundation/AutoPtr.h"
#include "Foundation/SingletonHolder.h"


Foundation_BEGIN


NotificationCenter::NotificationCenter()
{
}


NotificationCenter::~NotificationCenter()
{
	for (ObserverList::iterator it = _observers.begin(); it != _observers.end(); ++it)
	{
		delete *it;
	}
}


void NotificationCenter::addObserver(const AbstractObserver& observer)
{
	Mutex::ScopedLock lock(_mutex);
	_observers.push_front(observer.clone());
}


void NotificationCenter::removeObserver(const AbstractObserver& observer)
{
	Mutex::ScopedLock lock(_mutex);
	for (ObserverList::iterator it = _observers.begin(); it != _observers.end(); ++it)
	{
		if (*it && observer.equals(**it))
		{
			delete *it;
			*it = 0;
			return;
		}
	}
}


void NotificationCenter::postNotification(Notification* pNotification)
{
	poco_check_ptr (pNotification);

	Mutex::ScopedLock lock(_mutex);
	AutoPtr<Notification> pNf = pNotification;
	ObserverList::iterator it = _observers.begin();
	while (it != _observers.end())
	{
		ObserverList::iterator cur = it++;
		if (*cur)
		{
			(*cur)->notify(pNotification);
		}
		else
		{
			_observers.erase(cur);
		}
	}
}


NotificationCenter& NotificationCenter::defaultCenter()
{
	static SingletonHolder<NotificationCenter> sh;
	return *sh.get();
}


Foundation_END