granicus.if.org Git - postgresql/blob - src/include/postmaster/bgwriter.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * bgwriter.h
   4  *        Exports from postmaster/bgwriter.c and postmaster/checkpointer.c.
   5  *
   6  * The bgwriter process used to handle checkpointing duties too.  Now
   7  * there is a separate process, but we did not bother to split this header.
   8  *
   9  * Portions Copyright (c) 1996-2015, PostgreSQL Global Development Group
  10  *
  11  * src/include/postmaster/bgwriter.h
  12  *
  13  *-------------------------------------------------------------------------
  14  */
  15 #ifndef _BGWRITER_H
  16 #define _BGWRITER_H
  17
  18 #include "storage/block.h"
  19 #include "storage/relfilenode.h"
  20
  21
  22 /* GUC options */
  23 extern int      BgWriterDelay;
  24 extern int      CheckPointTimeout;
  25 extern int      CheckPointWarning;
  26 extern double CheckPointCompletionTarget;
  27
  28 extern void BackgroundWriterMain(void) pg_attribute_noreturn;
  29 extern void CheckpointerMain(void) pg_attribute_noreturn;
  30
  31 extern void RequestCheckpoint(int flags);
  32 extern void CheckpointWriteDelay(int flags, double progress);
  33
  34 extern bool ForwardFsyncRequest(RelFileNode rnode, ForkNumber forknum,
  35                                         BlockNumber segno);
  36 extern void AbsorbFsyncRequests(void);
  37
  38 extern Size CheckpointerShmemSize(void);
  39 extern void CheckpointerShmemInit(void);
  40
  41 extern bool FirstCallSinceLastCheckpoint(void);
  42
  43 #endif   /* _BGWRITER_H */