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e0c9301c87
do anything yet, but it has the necessary connections to initialization and so forth. Make some gestures towards allowing number of blocks in a relation to be BlockNumber, ie, unsigned int, rather than signed int. (I doubt I got all the places that are sloppy about it, yet.) On the way, replace the hardwired NLOCKS_PER_XACT fudge factor with a GUC variable.
113 lines
4 KiB
C
113 lines
4 KiB
C
/*-------------------------------------------------------------------------
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*
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* smgr.h
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* storage manager switch public interface declarations.
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*
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*
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: smgr.h,v 1.30 2001/06/27 23:31:39 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef SMGR_H
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#define SMGR_H
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#include "access/xlog.h"
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#include "storage/relfilenode.h"
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#include "storage/block.h"
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#include "storage/spin.h"
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#include "utils/rel.h"
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#define SM_FAIL 0
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#define SM_SUCCESS 1
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#define DEFAULT_SMGR 0
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extern int smgrinit(void);
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extern int smgrcreate(int16 which, Relation reln);
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extern int smgrunlink(int16 which, Relation reln);
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extern int smgrextend(int16 which, Relation reln, BlockNumber blocknum,
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char *buffer);
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extern int smgropen(int16 which, Relation reln, bool failOK);
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extern int smgrclose(int16 which, Relation reln);
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extern int smgrread(int16 which, Relation reln, BlockNumber blocknum,
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char *buffer);
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extern int smgrwrite(int16 which, Relation reln, BlockNumber blocknum,
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char *buffer);
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extern int smgrflush(int16 which, Relation reln, BlockNumber blocknum,
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char *buffer);
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extern int smgrblindwrt(int16 which, RelFileNode rnode,
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BlockNumber blkno, char *buffer, bool dofsync);
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extern int smgrblindmarkdirty(int16 which, RelFileNode rnode,
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BlockNumber blkno);
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extern int smgrmarkdirty(int16 which, Relation reln, BlockNumber blkno);
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extern BlockNumber smgrnblocks(int16 which, Relation reln);
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extern BlockNumber smgrtruncate(int16 which, Relation reln,
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BlockNumber nblocks);
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extern int smgrDoPendingDeletes(bool isCommit);
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extern int smgrcommit(void);
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extern int smgrabort(void);
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extern int smgrsync(void);
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extern void smgr_redo(XLogRecPtr lsn, XLogRecord *record);
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extern void smgr_undo(XLogRecPtr lsn, XLogRecord *record);
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extern void smgr_desc(char *buf, uint8 xl_info, char *rec);
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/* internals: move me elsewhere -- ay 7/94 */
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/* in md.c */
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extern int mdinit(void);
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extern int mdcreate(Relation reln);
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extern int mdunlink(RelFileNode rnode);
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extern int mdextend(Relation reln, BlockNumber blocknum, char *buffer);
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extern int mdopen(Relation reln);
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extern int mdclose(Relation reln);
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extern int mdread(Relation reln, BlockNumber blocknum, char *buffer);
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extern int mdwrite(Relation reln, BlockNumber blocknum, char *buffer);
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extern int mdflush(Relation reln, BlockNumber blocknum, char *buffer);
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extern int mdmarkdirty(Relation reln, BlockNumber blkno);
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extern int mdblindwrt(RelFileNode rnode, BlockNumber blkno,
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char *buffer, bool dofsync);
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extern int mdblindmarkdirty(RelFileNode rnode, BlockNumber blkno);
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extern BlockNumber mdnblocks(Relation reln);
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extern BlockNumber mdtruncate(Relation reln, BlockNumber nblocks);
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extern int mdcommit(void);
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extern int mdabort(void);
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extern int mdsync(void);
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/* mm.c */
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extern SPINLOCK MMCacheLock;
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extern int mminit(void);
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extern int mmcreate(Relation reln);
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extern int mmunlink(RelFileNode rnode);
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extern int mmextend(Relation reln, BlockNumber blocknum, char *buffer);
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extern int mmopen(Relation reln);
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extern int mmclose(Relation reln);
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extern int mmread(Relation reln, BlockNumber blocknum, char *buffer);
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extern int mmwrite(Relation reln, BlockNumber blocknum, char *buffer);
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extern int mmflush(Relation reln, BlockNumber blocknum, char *buffer);
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extern int mmblindwrt(char *dbname, char *relname, Oid dbid, Oid relid,
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BlockNumber blkno, char *buffer,
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bool dofsync);
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extern int mmmarkdirty(Relation reln, BlockNumber blkno);
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extern int mmblindmarkdirty(char *dbname, char *relname, Oid dbid, Oid relid,
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BlockNumber blkno);
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extern BlockNumber mmnblocks(Relation reln);
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extern BlockNumber mmtruncate(Relation reln, BlockNumber nblocks);
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extern int mmcommit(void);
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extern int mmabort(void);
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extern int mmshutdown(void);
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extern int MMShmemSize(void);
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/* smgrtype.c */
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extern Datum smgrout(PG_FUNCTION_ARGS);
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extern Datum smgrin(PG_FUNCTION_ARGS);
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extern Datum smgreq(PG_FUNCTION_ARGS);
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extern Datum smgrne(PG_FUNCTION_ARGS);
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#endif /* SMGR_H */
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