new trunk (base for 1.5)

windows build only

Foundation/src/PriorityNotificationQueue.cpp

@@ -0,0 +1,210 @@
+//
+// PriorityNotificationQueue.cpp
+//
+// $Id: //poco/1.4/Foundation/src/PriorityNotificationQueue.cpp#1 $
+//
+// Library: Foundation
+// Package: Notifications
+// Module:  PriorityNotificationQueue
+//
+// Copyright (c) 2009, 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 "Poco/PriorityNotificationQueue.h"
+#include "Poco/NotificationCenter.h"
+#include "Poco/Notification.h"
+#include "Poco/SingletonHolder.h"
+
+
+namespace Poco {
+
+
+PriorityNotificationQueue::PriorityNotificationQueue()
+{
+}
+
+
+PriorityNotificationQueue::~PriorityNotificationQueue()
+{
+	clear();
+}
+
+
+void PriorityNotificationQueue::enqueueNotification(Notification::Ptr pNotification, int priority)
+{
+	poco_check_ptr (pNotification);
+	FastMutex::ScopedLock lock(_mutex);
+	if (_waitQueue.empty())
+	{
+		_nfQueue.insert(NfQueue::value_type(priority, pNotification));
+	}
+	else
+	{
+		poco_assert_dbg(_nfQueue.empty());
+		WaitInfo* pWI = _waitQueue.front();
+		_waitQueue.pop_front();
+		pWI->pNf = pNotification;
+		pWI->nfAvailable.set();
+	}	
+}
+
+
+Notification* PriorityNotificationQueue::dequeueNotification()
+{
+	FastMutex::ScopedLock lock(_mutex);
+	return dequeueOne().duplicate();
+}
+
+
+Notification* PriorityNotificationQueue::waitDequeueNotification()
+{
+	Notification::Ptr pNf;
+	WaitInfo* pWI = 0;
+	{
+		FastMutex::ScopedLock lock(_mutex);
+		pNf = dequeueOne();
+		if (pNf) return pNf.duplicate();
+		pWI = new WaitInfo;
+		_waitQueue.push_back(pWI);
+	}
+	pWI->nfAvailable.wait();
+	pNf = pWI->pNf;
+	delete pWI;
+	return pNf.duplicate();
+}
+
+
+Notification* PriorityNotificationQueue::waitDequeueNotification(long milliseconds)
+{
+	Notification::Ptr pNf;
+	WaitInfo* pWI = 0;
+	{
+		FastMutex::ScopedLock lock(_mutex);
+		pNf = dequeueOne();
+		if (pNf) return pNf.duplicate();
+		pWI = new WaitInfo;
+		_waitQueue.push_back(pWI);
+	}
+	if (pWI->nfAvailable.tryWait(milliseconds))
+	{
+		pNf = pWI->pNf;
+	}
+	else
+	{
+		FastMutex::ScopedLock lock(_mutex);
+		pNf = pWI->pNf;
+		for (WaitQueue::iterator it = _waitQueue.begin(); it != _waitQueue.end(); ++it)
+		{
+			if (*it == pWI)
+			{
+				_waitQueue.erase(it);
+				break;
+			}
+		}
+	}
+	delete pWI;
+	return pNf.duplicate();
+}
+
+
+void PriorityNotificationQueue::dispatch(NotificationCenter& notificationCenter)
+{
+	FastMutex::ScopedLock lock(_mutex);
+	Notification::Ptr pNf = dequeueOne();
+	while (pNf)
+	{
+		notificationCenter.postNotification(pNf);
+		pNf = dequeueOne();
+	}
+}
+
+
+void PriorityNotificationQueue::wakeUpAll()
+{
+	FastMutex::ScopedLock lock(_mutex);
+	for (WaitQueue::iterator it = _waitQueue.begin(); it != _waitQueue.end(); ++it)
+	{
+		(*it)->nfAvailable.set();
+	}
+	_waitQueue.clear();
+}
+
+
+bool PriorityNotificationQueue::empty() const
+{
+	FastMutex::ScopedLock lock(_mutex);
+	return _nfQueue.empty();
+}
+
+	
+int PriorityNotificationQueue::size() const
+{
+	FastMutex::ScopedLock lock(_mutex);
+	return static_cast<int>(_nfQueue.size());
+}
+
+
+void PriorityNotificationQueue::clear()
+{
+	FastMutex::ScopedLock lock(_mutex);
+	_nfQueue.clear();	
+}
+
+
+bool PriorityNotificationQueue::hasIdleThreads() const
+{
+	FastMutex::ScopedLock lock(_mutex);
+	return !_waitQueue.empty();
+}
+
+
+Notification::Ptr PriorityNotificationQueue::dequeueOne()
+{
+	Notification::Ptr pNf;
+	NfQueue::iterator it = _nfQueue.begin();
+	if (it != _nfQueue.end())
+	{
+		pNf = it->second;
+		_nfQueue.erase(it);
+	}
+	return pNf;
+}
+
+
+namespace
+{
+	static SingletonHolder<PriorityNotificationQueue> sh;
+}
+
+
+PriorityNotificationQueue& PriorityNotificationQueue::defaultQueue()
+{
+	return *sh.get();
+}
+
+
+} // namespace Poco