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/*-------------------------------------------------------------------------
*
* smgr.h--
* storage manager switch public interface declarations.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: smgr.h,v 1.12 1998/09/01 04:38:37 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef SMGR_H
#define SMGR_H
#include <storage/spin.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, char *buffer);
extern int smgropen(int16 which, Relation reln);
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 smgrflush(int16 which, Relation reln, BlockNumber blocknum,
char *buffer);
extern int smgrblindwrt(int16 which, char *dbname, char *relname, Oid dbid,
Oid relid, BlockNumber blkno, char *buffer);
extern int smgrnblocks(int16 which, Relation reln);
extern int smgrtruncate(int16 which, Relation reln, int nblocks);
extern int smgrcommit(void);
extern bool smgriswo(int16 smgrno);
/* internals: move me elsewhere -- ay 7/94 */
/* in md.c */
extern int mdinit(void);
extern int mdcreate(Relation reln);
extern int mdunlink(Relation reln);
extern int mdextend(Relation reln, 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 mdflush(Relation reln, BlockNumber blocknum, char *buffer);
extern int mdblindwrt(char *dbstr, char *relstr, Oid dbid, Oid relid,
BlockNumber blkno, char *buffer);
extern int mdnblocks(Relation reln);
extern int mdtruncate(Relation reln, int nblocks);
extern int mdcommit(void);
extern int mdabort(void);
/* mm.c */
extern SPINLOCK MMCacheLock;
extern int mminit(void);
extern int mmshutdown(void);
extern int mmcreate(Relation reln);
extern int mmunlink(Relation reln);
extern int mmextend(Relation reln, 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 mmflush(Relation reln, BlockNumber blocknum, char *buffer);
extern int mmblindwrt(char *dbstr, char *relstr, Oid dbid, Oid relid,
BlockNumber blkno, char *buffer);
extern int mmnblocks(Relation reln);
extern int mmcommit(void);
extern int mmabort(void);
extern int MMShmemSize(void);
/* smgrtype.c */
extern char *smgrout(int2 i);
extern int2 smgrin(char *s);
extern bool smgreq(int2 a, int2 b);
extern bool smgrne(int2 a, int2 b);
#endif /* SMGR_H */
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