head 1.6; access; symbols Version_2_1:1.5 Version_2:1.4 C_Demo_1:1.4; locks; strict; comment @ * @; 1.6 date 91.04.01.08.40.57; author hong; state Exp; branches; next 1.5; 1.5 date 90.08.17.08.53.43; author cimarron; state Exp; branches; next 1.4; 1.4 date 89.09.05.17.11.53; author mao; state Version_2; branches; next 1.3; 1.3 date 89.04.12.19.56.10; author dillon; state Exp; branches; next 1.2; 1.2 date 89.03.22.17.34.31; author muir; state Stab; branches; next 1.1; 1.1 date 89.01.17.05.54.52; author cimarron; state Exp; branches; next ; desc @@ 1.6 log @for debugging memory leaks @ text @/* * sinvaladt.h -- * POSTGRES shared cache invalidation segment definitions. * * Identification: * $Header: RCS/sinvaladt.h,v 1.5 90/08/17 08:53:43 cimarron Exp $ */ #ifndef SinvaladtHIncluded #define SinvaladtHIncluded 1 #include "tmp/postgres.h" /* XXX */ #include "storage/ipc.h" #include "storage/itemptr.h" #include "storage/sinval.h" /* * The structure of the shared cache invaidation segment * */ /* A------------- Header info -------------- criticalSectionSemaphoreId generalSemaphoreId startEntrySection (offset a) endEntrySection (offset a + b) startFreeSpace (offset relative to B) startEntryChain (offset relatiev to B) endEntryChain (offset relative to B) numEntries maxNumEntries procState[MaxBackendId] --> limit resetState (bool) a tag (POSTID) B------------- Start entry section ------- SISegEntry --> entryData --> ... (see SharedInvalidData!) isfree (bool) next (offset to next entry in chain ) b .... (dynamically growing down) C----------------End shared segment ------- */ /* Parameters (configurable) *******************************************/ #define MaxBackendId 32 /* maximum number of backends */ #define MAXNUMMESSAGES 1000 /* maximum number of messages in seg*/ #define InvalidOffset 1000000000 /* a invalid offset (End of chain) */ typedef struct ProcState { int limit; /* the number of read messages */ bool resetState; /* true, if backend has to reset its state */ int tag; /* special tag, recieved from the postmaster */ } ProcState; typedef struct SISeg { IpcSemaphoreId criticalSectionSemaphoreId; /* semaphore id */ IpcSemaphoreId generalSemaphoreId; /* semaphore id */ Offset startEntrySection; /* (offset a) */ Offset endEntrySection; /* (offset a + b) */ Offset startFreeSpace; /* (offset relative to B) */ Offset startEntryChain; /* (offset relative to B) */ Offset endEntryChain; /* (offset relative to B) */ int numEntries; int maxNumEntries; ProcState procState[MaxBackendId]; /* reflects the invalidation state */ /* here starts the entry section, controlled by offsets */ } SISeg; #define SizeSISeg sizeof(SISeg) typedef struct SharedInvalidData { int cacheId; /* XXX */ Index hashIndex; ItemPointerData pointerData; } SharedInvalidData; typedef SharedInvalidData *SharedInvalid; typedef struct SISegEntry { SharedInvalidData entryData; /* the message data */ bool isfree; /* entry free? */ Offset next; /* offset to next entry*/ } SISegEntry; #define SizeOfOneSISegEntry sizeof(SISegEntry) typedef struct SISegOffsets { Offset startSegment; /* always 0 (for now) */ Offset offsetToFirstEntry; /* A + a = B */ Offset offsetToEndOfSegemnt; /* A + a + b */ } SISegOffsets; /****************************************************************************/ /* synchronization of the shared buffer access */ /* access to the buffer is synchronized by the lock manager !! */ /****************************************************************************/ #define SI_LockStartValue 255 #define SI_SharedLock (-1) #define SI_ExclusiveLock (-255) #endif SinvaladtHIncluded @ 1.5 log @added pathnames to #include statements @ text @d6 1 a6 1 * $Header: RCS/sinvaladt.h,v 1.4 89/09/05 17:11:53 mao Version_2 Locker: cimarron $ d38 1 a38 1 free (bool) d85 1 a85 1 bool free; /* entry free? */ @ 1.4 log @Working version of C-only demo @ text @d6 1 a6 1 * $Header: /usr6/postgres/mao/postgres/src/lib/H/RCS/sinvaladt.h,v 1.3 89/04/12 19:56:10 dillon Exp $ d9 2 a10 1 #include "postgres.h" /* XXX */ d12 1 a12 3 #ifndef C_H #include "c.h" #endif d14 3 a16 3 #include "ipc.h" #include "itemptr.h" #include "sinval.h" d106 2 @ 1.3 log @c.h @ text @d6 1 a6 1 * $Header: /usr6/postgres/dillon/ptree/src/lib/H/RCS/sinvaladt.h,v 1.2 89/03/22 17:34:31 muir Stab $ @ 1.2 log @copyright removal @ text @d6 1 a6 1 * $Header: /usr6/postgres/muir/postgres/src/lib/H/RCS/sinvaladt.h,v 1.1 89/01/17 05:54:52 cimarron Exp $ d11 1 d13 1 @ 1.1 log @Initial revision @ text @a0 27 ; /* ; * ; * POSTGRES Data Base Management System ; * ; * Copyright (c) 1988 Regents of the University of California ; * ; * Permission to use, copy, modify, and distribute this software and its ; * documentation for educational, research, and non-profit purposes and ; * without fee is hereby granted, provided that the above copyright ; * notice appear in all copies and that both that copyright notice and ; * this permission notice appear in supporting documentation, and that ; * the name of the University of California not be used in advertising ; * or publicity pertaining to distribution of the software without ; * specific, written prior permission. Permission to incorporate this ; * software into commercial products can be obtained from the Campus ; * Software Office, 295 Evans Hall, University of California, Berkeley, ; * Ca., 94720 provided only that the the requestor give the University ; * of California a free licence to any derived software for educational ; * and research purposes. The University of California makes no ; * representations about the suitability of this software for any ; * purpose. It is provided "as is" without express or implied warranty. ; * ; */ d6 1 a6 1 * $Header: sinvaladt.h,v 1.1 88/11/11 16:37:24 postgres Exp $ @