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/*
* xloginsert.h
*
* Functions for generating WAL records
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/access/xloginsert.h
*/
#ifndef XLOGINSERT_H
#define XLOGINSERT_H
#include "access/rmgr.h"
#include "access/xlogdefs.h"
#include "storage/block.h"
#include "storage/buf.h"
#include "storage/relfilenode.h"
#include "utils/relcache.h"
/*
* The minimum size of the WAL construction working area. If you need to
* register more than XLR_NORMAL_MAX_BLOCK_ID block references or have more
* than XLR_NORMAL_RDATAS data chunks in a single WAL record, you must call
* XLogEnsureRecordSpace() first to allocate more working memory.
*/
#define XLR_NORMAL_MAX_BLOCK_ID 4
#define XLR_NORMAL_RDATAS 20
/* flags for XLogRegisterBuffer */
#define REGBUF_FORCE_IMAGE 0x01 /* force a full-page image */
#define REGBUF_NO_IMAGE 0x02 /* don't take a full-page image */
#define REGBUF_WILL_INIT (0x04 | 0x02) /* page will be re-initialized at
* replay (implies NO_IMAGE) */
#define REGBUF_STANDARD 0x08 /* page follows "standard" page layout,
* (data between pd_lower and pd_upper
* will be skipped) */
#define REGBUF_KEEP_DATA 0x10 /* include data even if a full-page image
* is taken */
/* prototypes for public functions in xloginsert.c: */
extern void XLogBeginInsert(void);
extern void XLogSetRecordFlags(uint8 flags);
extern XLogRecPtr XLogInsert(RmgrId rmid, uint8 info);
extern void XLogEnsureRecordSpace(int nbuffers, int ndatas);
extern void XLogRegisterData(char *data, int len);
extern void XLogRegisterBuffer(uint8 block_id, Buffer buffer, uint8 flags);
extern void XLogRegisterBlock(uint8 block_id, RelFileNode *rnode,
ForkNumber forknum, BlockNumber blknum, char *page,
uint8 flags);
extern void XLogRegisterBufData(uint8 block_id, char *data, int len);
extern void XLogResetInsertion(void);
extern bool XLogCheckBufferNeedsBackup(Buffer buffer);
extern XLogRecPtr log_newpage(RelFileNode *rnode, ForkNumber forkNum,
BlockNumber blk, char *page, bool page_std);
extern XLogRecPtr log_newpage_buffer(Buffer buffer, bool page_std);
extern void log_newpage_range(Relation rel, ForkNumber forkNum,
BlockNumber startblk, BlockNumber endblk, bool page_std);
extern XLogRecPtr XLogSaveBufferForHint(Buffer buffer, bool buffer_std);
extern void InitXLogInsert(void);
#endif /* XLOGINSERT_H */
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