1 /* 2 Copyright (C) 2003, 2005, 2006 MySQL AB 3 All rights reserved. Use is subject to license terms. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License, version 2.0, 7 as published by the Free Software Foundation. 8 9 This program is also distributed with certain software (including 10 but not limited to OpenSSL) that is licensed under separate terms, 11 as designated in a particular file or component or in included license 12 documentation. The authors of MySQL hereby grant you an additional 13 permission to link the program and your derivative works with the 14 separately licensed software that they have included with MySQL. 15 16 This program is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 GNU General Public License, version 2.0, for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with this program; if not, write to the Free Software 23 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 24 */ 25 26 #ifndef TimeQueue_H 27 #define TimeQueue_H 28 29 #include <kernel_types.h> 30 #include "Prio.hpp" 31 32 #define MAX_NO_OF_SHORT_TQ 512 33 #define MAX_NO_OF_LONG_TQ 512 34 #define MAX_NO_OF_TQ (MAX_NO_OF_SHORT_TQ + MAX_NO_OF_LONG_TQ) 35 #define NULL_TQ_ENTRY 65535 36 37 class Signal; 38 39 struct TimeStruct 40 { 41 Uint16 delay_time; 42 Uint16 job_index; 43 }; 44 45 union TimerEntry 46 { 47 struct TimeStruct time_struct; 48 Uint32 copy_struct; 49 }; 50 51 class TimeQueue 52 { 53 public: 54 TimeQueue(); 55 ~TimeQueue(); 56 57 void insert(Signal* signal, BlockNumber bnr, 58 GlobalSignalNumber gsn, Uint32 delayTime); 59 void clear(); 60 void scanTable(); // Called once per millisecond 61 Uint32 getIndex(); 62 void releaseIndex(Uint32 aIndex); 63 void recount_timers(); 64 65 private: 66 TimerEntry theShortQueue[MAX_NO_OF_SHORT_TQ]; 67 TimerEntry theLongQueue[MAX_NO_OF_LONG_TQ]; 68 Uint16 theFreeIndex[MAX_NO_OF_TQ]; 69 }; 70 71 #endif 72