initial import

Foundation/src/NotificationCenter.cpp

@@ -0,0 +1,119 @@
+//
+// NotificationCenter.cpp
+//
+// $Id: //poco/1.1.0/Foundation/src/NotificationCenter.cpp#2 $
+//
+// Library: Foundation
+// Package: Notifications
+// Module:  NotificationCenter
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// Permission is hereby granted, free of charge, to any person or organization
+// obtaining a copy of the software and accompanying documentation covered by
+// this license (the "Software") to use, reproduce, display, distribute,
+// execute, and transmit the Software, and to prepare derivative works of the
+// Software, and to permit third-parties to whom the Software is furnished to
+// do so, all subject to the following:
+// 
+// The copyright notices in the Software and this entire statement, including
+// the above license grant, this restriction and the following disclaimer,
+// must be included in all copies of the Software, in whole or in part, and
+// all derivative works of the Software, unless such copies or derivative
+// works are solely in the form of machine-executable object code generated by
+// a source language processor.
+// 
+// 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, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+
+
+#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);
+		}
+	}
+}
+
+
+bool NotificationCenter::hasObservers() const
+{
+	Mutex::ScopedLock lock(_mutex);
+	return !_observers.empty();
+}
+
+
+NotificationCenter& NotificationCenter::defaultCenter()
+{
+	static SingletonHolder<NotificationCenter> sh;
+	return *sh.get();
+}
+
+
+Foundation_END