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//
// NotificationQueue.cpp
//
// Library: Foundation
// Package: Notifications
// Module: NotificationQueue
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/NotificationQueue.h"
#include "Poco/NotificationCenter.h"
#include "Poco/Notification.h"
#include "Poco/SingletonHolder.h"
namespace Poco {
NotificationQueue::NotificationQueue()
{
}
NotificationQueue::~NotificationQueue()
{
try
{
clear();
}
catch (...)
{
poco_unexpected();
}
}
void NotificationQueue::enqueueNotification(Notification::Ptr pNotification)
{
poco_check_ptr (pNotification);
FastMutex::ScopedLock lock(_mutex);
if (_waitQueue.empty())
{
_nfQueue.push_back(pNotification);
}
else
{
WaitInfo* pWI = _waitQueue.front();
_waitQueue.pop_front();
pWI->pNf = pNotification;
pWI->nfAvailable.set();
}
}
void NotificationQueue::enqueueUrgentNotification(Notification::Ptr pNotification)
{
poco_check_ptr (pNotification);
FastMutex::ScopedLock lock(_mutex);
if (_waitQueue.empty())
{
_nfQueue.push_front(pNotification);
}
else
{
WaitInfo* pWI = _waitQueue.front();
_waitQueue.pop_front();
pWI->pNf = pNotification;
pWI->nfAvailable.set();
}
}
Notification* NotificationQueue::dequeueNotification()
{
FastMutex::ScopedLock lock(_mutex);
return dequeueOne().duplicate();
}
Notification* NotificationQueue::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* NotificationQueue::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 NotificationQueue::dispatch(NotificationCenter& notificationCenter)
{
FastMutex::ScopedLock lock(_mutex);
Notification::Ptr pNf = dequeueOne();
while (pNf)
{
notificationCenter.postNotification(pNf);
pNf = dequeueOne();
}
}
void NotificationQueue::wakeUpAll()
{
FastMutex::ScopedLock lock(_mutex);
for (WaitQueue::iterator it = _waitQueue.begin(); it != _waitQueue.end(); ++it)
{
(*it)->nfAvailable.set();
}
_waitQueue.clear();
}
bool NotificationQueue::empty() const
{
FastMutex::ScopedLock lock(_mutex);
return _nfQueue.empty();
}
int NotificationQueue::size() const
{
FastMutex::ScopedLock lock(_mutex);
return static_cast<int>(_nfQueue.size());
}
void NotificationQueue::clear()
{
FastMutex::ScopedLock lock(_mutex);
_nfQueue.clear();
}
bool NotificationQueue::hasIdleThreads() const
{
FastMutex::ScopedLock lock(_mutex);
return !_waitQueue.empty();
}
Notification::Ptr NotificationQueue::dequeueOne()
{
Notification::Ptr pNf;
if (!_nfQueue.empty())
{
pNf = _nfQueue.front();
_nfQueue.pop_front();
}
return pNf;
}
namespace
{
static SingletonHolder<NotificationQueue> sh;
}
NotificationQueue& NotificationQueue::defaultQueue()
{
return *sh.get();
}
} // namespace Poco
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