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Dir : ~/usr/include/pgsql/server/postmaster/

View File Name : bgwriter.h

/*-------------------------------------------------------------------------
 *
 * bgwriter.h
 *	  Exports from postmaster/bgwriter.c and postmaster/checkpointer.c.
 *
 * The bgwriter process used to handle checkpointing duties too.  Now
 * there is a separate process, but we did not bother to split this header.
 *
 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
 *
 * src/include/postmaster/bgwriter.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef _BGWRITER_H
#define _BGWRITER_H

#include "storage/block.h"
#include "storage/relfilenode.h"


/* GUC options */
extern int	BgWriterDelay;
extern int	CheckPointTimeout;
extern int	CheckPointWarning;
extern double CheckPointCompletionTarget;

extern void BackgroundWriterMain(void);
extern void CheckpointerMain(void);

extern void RequestCheckpoint(int flags);
extern void CheckpointWriteDelay(int flags, double progress);

extern bool ForwardFsyncRequest(RelFileNode rnode, ForkNumber forknum,
					BlockNumber segno);
extern void AbsorbFsyncRequests(void);

extern Size CheckpointerShmemSize(void);
extern void CheckpointerShmemInit(void);

extern bool FirstCallSinceLastCheckpoint(void);

#endif   /* _BGWRITER_H */