clientpq.h
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- /*
- *
- * Priority Queue Time-Based Scheduler
- *
- */
- #ifndef _CLIENTPQ_H_
- #define _CLIENTPQ_H_
- //#include "id.h"
- #include "hxassert.h"
- #include "pq.h"
- #include "hxthread.h"
- class HXMutex;
- #define DEFAULT_NODE_CACHE_SIZE 50
- class ClientPQ : public PQ
- {
- public:
- ClientPQ(CHXID* pIds = NULL);
- virtual ~ClientPQ();
- virtual int execute(Timeval now);
- virtual UINT32 enter(Timeval t, IHXCallback* i);
- virtual void remove(UINT32 handle);
- virtual BOOL removeifexists(UINT32 id);
-
- void SetCacheSize(UINT16 uCacheSize) {m_uNumNodesToCache = uCacheSize;};
- inline PQElem* new_elem(void);
- inline void free_elem(PQElem*& pElem);
- protected:
- PQElem* m_pFreeList;
- UINT16 m_uNumFreeNodes;
- UINT16 m_uNumNodesToCache;
- HXMutex* m_pMutex;
- };
- inline PQElem*
- ClientPQ::new_elem(void)
- {
- if (!m_pFreeList)
- {
- return (new PQElem);
- }
-
- m_pMutex->Lock();
- PQElem* pNew = m_pFreeList;
- m_pFreeList = m_pFreeList->m_pNext;
- m_uNumFreeNodes--;
- m_pMutex->Unlock();
- return pNew;
- }
- inline void
- ClientPQ::free_elem(PQElem*& pElem)
- {
- m_pMutex->Lock();
- if (m_uNumFreeNodes < m_uNumNodesToCache)
- {
- pElem->m_bDefunct = FALSE;
- HX_ASSERT(!m_pFreeList || m_uNumFreeNodes > 0);
- if (!m_pFreeList)
- {
- m_pFreeList = pElem;
- pElem->m_pNext = NULL;
- }
- else
- {
- pElem->m_pNext = m_pFreeList;
- m_pFreeList = pElem;
- }
- m_uNumFreeNodes++;
- }
- else
- {
- delete pElem;
- }
- m_pMutex->Unlock();
- }
- #endif /*_CLIENTPQ_H_*/