TimeQueue.hpp
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上传日期:2022-05-23
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- /* Copyright (C) 2003 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #ifndef TimeQueue_H
- #define TimeQueue_H
- #include <kernel_types.h>
- #include "Prio.hpp"
- #define MAX_NO_OF_SHORT_TQ 512
- #define MAX_NO_OF_LONG_TQ 512
- #define MAX_NO_OF_TQ (MAX_NO_OF_SHORT_TQ + MAX_NO_OF_LONG_TQ)
- #define NULL_TQ_ENTRY 65535
- class Signal;
- struct TimeStruct
- {
- Uint16 delay_time;
- Uint16 job_index;
- };
- union TimerEntry
- {
- struct TimeStruct time_struct;
- Uint32 copy_struct;
- };
- class TimeQueue
- {
- public:
- TimeQueue();
- ~TimeQueue();
- void insert(Signal* signal, BlockNumber bnr,
- GlobalSignalNumber gsn, Uint32 delayTime);
- void clear();
- void scanTable(); // Called once per millisecond
- Uint32 getIndex();
- void releaseIndex(Uint32 aIndex);
- void recount_timers();
-
- private:
- TimerEntry theShortQueue[MAX_NO_OF_SHORT_TQ];
- TimerEntry theLongQueue[MAX_NO_OF_LONG_TQ];
- Uint16 theFreeIndex[MAX_NO_OF_TQ];
- };
- #endif