greenplumn generic_xlog 源码
greenplumn generic_xlog 代码
文件路径：/src/include/access/generic_xlog.h
/*-------------------------------------------------------------------------
*
* generic_xlog.h
* Generic xlog API definition.
*
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/access/generic_xlog.h
*
*-------------------------------------------------------------------------
*/
#ifndef GENERIC_XLOG_H
#define GENERIC_XLOG_H
#include "access/xlog.h"
#include "access/xlog_internal.h"
#include "access/xloginsert.h"
#include "storage/bufpage.h"
#include "utils/rel.h"
#define MAX_GENERIC_XLOG_PAGES XLR_NORMAL_MAX_BLOCK_ID
/* Flag bits for GenericXLogRegisterBuffer */
#define GENERIC_XLOG_FULL_IMAGE 0x0001 /* write full-page image */
/* state of generic xlog record construction */
struct GenericXLogState;
typedef struct GenericXLogState GenericXLogState;
/* API for construction of generic xlog records */
extern GenericXLogState *GenericXLogStart(Relation relation);
extern Page GenericXLogRegisterBuffer(GenericXLogState *state, Buffer buffer,
int flags);
extern XLogRecPtr GenericXLogFinish(GenericXLogState *state);
extern void GenericXLogAbort(GenericXLogState *state);
/* functions defined for rmgr */
extern void generic_redo(XLogReaderState *record);
extern const char *generic_identify(uint8 info);
extern void generic_desc(StringInfo buf, XLogReaderState *record);
extern void generic_mask(char *pagedata, BlockNumber blkno);
#endif /* GENERIC_XLOG_H */
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