observed.c

比较权威的p2p仿真软件

/*
 * Copyright (c) 2003-2005 Thomer M. Gil ([e-mail])
 *                    Massachusetts Institute of Technology
 * 
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include "observed.h"

Observed::Observed()
{
  _observers.clear();
  _hasObservers = false;
};

void
Observed::registerObserver(Observer *o)
{
  _observers.insert(o);
  _hasObservers = true;
}

void
Observed::unregisterObserver(Observer *o)
{
  _observers.erase(o);
  if(!_observers.size())
    _hasObservers = false;
}

void
Observed::notifyObservers(ObserverInfo *oi)
{
  if(!_hasObservers)
    return;

  for(set<Observer*>::const_iterator i = _observers.begin(); i != _observers.end(); ++i)
    (*i)->kick(this, oi);
}