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/*-------------------------------------------------------------------------
*
* smgr.h
* storage manager switch public interface declarations.
*
*
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: smgr.h,v 1.38 2003/11/09 21:30:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef SMGR_H
#define SMGR_H
#include "access/xlog.h"
#include "fmgr.h"
#include "storage/relfilenode.h"
#include "storage/block.h"
#include "utils/rel.h"
#define SM_FAIL 0
#define SM_SUCCESS 1
#define DEFAULT_SMGR 0
extern int smgrinit(void);
extern int smgrcreate(int16 which, Relation reln);
extern int smgrunlink(int16 which, Relation reln);
extern int smgrextend(int16 which, Relation reln, BlockNumber blocknum,
char *buffer);
extern int smgropen(int16 which, Relation reln, bool failOK);
extern int smgrclose(int16 which, Relation reln);
extern int smgrread(int16 which, Relation reln, BlockNumber blocknum,
char *buffer);
extern int smgrwrite(int16 which, Relation reln, BlockNumber blocknum,
char *buffer);
extern int smgrblindwrt(int16 which, RelFileNode rnode,
BlockNumber blkno, char *buffer);
extern BlockNumber smgrnblocks(int16 which, Relation reln);
extern BlockNumber smgrtruncate(int16 which, Relation reln,
BlockNumber nblocks);
extern int smgrDoPendingDeletes(bool isCommit);
extern int smgrcommit(void);
extern int smgrabort(void);
extern int smgrsync(void);
extern void smgr_redo(XLogRecPtr lsn, XLogRecord *record);
extern void smgr_undo(XLogRecPtr lsn, XLogRecord *record);
extern void smgr_desc(char *buf, uint8 xl_info, char *rec);
/* internals: move me elsewhere -- ay 7/94 */
/* in md.c */
extern int mdinit(void);
extern int mdcreate(Relation reln);
extern int mdunlink(RelFileNode rnode);
extern int mdextend(Relation reln, BlockNumber blocknum, char *buffer);
extern int mdopen(Relation reln);
extern int mdclose(Relation reln);
extern int mdread(Relation reln, BlockNumber blocknum, char *buffer);
extern int mdwrite(Relation reln, BlockNumber blocknum, char *buffer);
extern int mdblindwrt(RelFileNode rnode, BlockNumber blkno, char *buffer);
extern BlockNumber mdnblocks(Relation reln);
extern BlockNumber mdtruncate(Relation reln, BlockNumber nblocks);
extern int mdcommit(void);
extern int mdabort(void);
extern int mdsync(void);
/* mm.c */
extern int mminit(void);
extern int mmcreate(Relation reln);
extern int mmunlink(RelFileNode rnode);
extern int mmextend(Relation reln, BlockNumber blocknum, char *buffer);
extern int mmopen(Relation reln);
extern int mmclose(Relation reln);
extern int mmread(Relation reln, BlockNumber blocknum, char *buffer);
extern int mmwrite(Relation reln, BlockNumber blocknum, char *buffer);
extern int mmblindwrt(RelFileNode rnode, BlockNumber blkno, char *buffer);
extern BlockNumber mmnblocks(Relation reln);
extern BlockNumber mmtruncate(Relation reln, BlockNumber nblocks);
extern int mmcommit(void);
extern int mmabort(void);
extern int mmshutdown(void);
extern int MMShmemSize(void);
/* smgrtype.c */
extern Datum smgrout(PG_FUNCTION_ARGS);
extern Datum smgrin(PG_FUNCTION_ARGS);
extern Datum smgreq(PG_FUNCTION_ARGS);
extern Datum smgrne(PG_FUNCTION_ARGS);
#endif /* SMGR_H */
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