pq.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 ***** */
- #ifndef _PQ_H_
- #define _PQ_H_
- #include "id.h"
- #include "hxcom.h"
- #include "hxtypes.h"
- #include "hxcomm.h"
- #include "hxengin.h"
- #include "hxassert.h"
- #include "timeval.h"
- class CHXID;
- /*
- * Timing resolution is equal to 1/RESOLUTION seconds.
- * BUCKET_TIME is the amount of time that we would like buckets allocated for.
- * NUM_BUCKETS is the number of buckets that we will allocate.
- * USEC_PER_BUCKET is the number of microseconds per bucket.
- */
- #define RESOLUTION 64
- #define BUCKET_TIME 8
- #define NUM_BUCKETS (RESOLUTION * BUCKET_TIME)
- #define USEC_PER_BUCKET (1000000 / RESOLUTION)
- #define PQ_UNINITIALIZED 1
- class PQElem
- {
- public:
- FAST_CACHE_MEM
- PQElem() : m_pCallback(0), m_pNext(0), m_bDefunct(0), m_Id(0), m_bRemoved(0)
- {
- m_Time.tv_sec = 0;
- m_Time.tv_usec = 0;
- }
- IHXCallback* m_pCallback;
- PQElem* m_pNext;
- Timeval m_Time;
- BOOL m_bDefunct;
- BOOL m_bRemoved;
- UINT32 m_Id;
- };
- class PQ
- {
- protected:
- PQElem* _remove_head(Timeval now);
- PQElem* dispatch_element(PQElem* pElem);
- void destroy_element(PQElem* pElem);
- PQElem* m_pBuckets[NUM_BUCKETS];
- PQElem* m_pHead;
- PQElem* m_pNextZeroInsertion;
- LONG32 m_lElementCount;
- Timeval m_Bucket0Time;
- Timeval m_HeadTime;
- CHXID* m_pIds;
- BOOL m_bOwnID;
- public:
- PQ(CHXID* pIds = NULL);
- virtual ~PQ();
- virtual int execute(Timeval now);
- virtual UINT32 enter(Timeval t, IHXCallback* i);
- virtual PQElem* get_execute_list(Timeval now);
- virtual PQElem* execute_element(PQElem* pElem);
- virtual void free_callback(IHXCallback* pCb) { pCb->Release(); }
- virtual PQElem* new_elem(void) { return (new PQElem); }
- virtual void free_elem(PQElem*& pElem) { delete pElem; }
- virtual void free_mem() { }
- virtual void remove(UINT32 handle);
- virtual BOOL removeifexists(UINT32 handle);
- int empty() { return m_lElementCount == 0; }
- int immediate() { return (!empty()) && (m_HeadTime.tv_sec == 0 && m_HeadTime.tv_usec == 0); }
- Timeval head_time();
- BOOL exists(UINT32 handle);
- };
- inline Timeval
- PQ::head_time()
- {
- //ASSERT (m_HeadTime.tv_sec > 0);XXXSMP It should be ok that HeadTime == 0
- return m_HeadTime;
- }
- #endif