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99 lines
2.8 KiB
99 lines
2.8 KiB
/*
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* Copyright (C) 2002-2003 Fhg Fokus
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*
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* This file is part of SEMS, a free SIP media server.
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*
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* SEMS is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version. This program is released under
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* the GPL with the additional exemption that compiling, linking,
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* and/or using OpenSSL is allowed.
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*
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* For a license to use the SEMS software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* SEMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/** @file AmEventQueue.h */
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#ifndef _AMEVENTQUEUE_H_
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#define _AMEVENTQUEUE_H_
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#include "AmThread.h"
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#include "AmEvent.h"
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#include "atomic_types.h"
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#include <queue>
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class AmEventQueueInterface
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{
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public:
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virtual ~AmEventQueueInterface() {}
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virtual void postEvent(AmEvent*)=0;
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};
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class AmEventQueue;
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/** a receiver for notifications about
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the fact that events are pending */
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class AmEventNotificationSink
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{
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public:
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virtual ~AmEventNotificationSink() { }
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virtual void notify(AmEventQueue* sender) = 0;
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};
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/**
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* \brief Asynchronous event queue implementation
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*
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* This class implements an event queue; a queue into which
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* \ref AmEvent can safely be posted at any time from any
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* thread, which are then processed by the registered event
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* handler.
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*/
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class AmEventQueue
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: public AmEventQueueInterface,
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public atomic_ref_cnt
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{
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protected:
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AmEventHandler* handler;
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AmEventNotificationSink* wakeup_handler;
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std::queue<AmEvent*> ev_queue;
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AmMutex m_queue;
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AmCondition ev_pending;
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bool finalized;
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public:
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AmEventQueue(AmEventHandler* handler);
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virtual ~AmEventQueue();
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void postEvent(AmEvent*);
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void processEvents();
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void waitForEvent();
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void waitForEventTimed(unsigned long msec);
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void processSingleEvent();
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bool eventPending();
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void setEventNotificationSink(AmEventNotificationSink* _wakeup_handler);
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bool is_finalized() { return finalized; }
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// return true to continue processing
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virtual bool startup() { return true; }
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virtual bool processingCycle() { processEvents(); return true; }
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virtual void finalize() { finalized = true; }
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};
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#endif
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