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