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Name	Size	Permission	Date
backendid.h	730 B	-rw-r--r--	2023-12-20 12:58
barrier.h	6.6 KB	-rw-r--r--	2023-12-20 12:58
block.h	3.21 KB	-rw-r--r--	2023-12-20 12:58
buf.h	1.06 KB	-rw-r--r--	2023-12-20 12:58
buf_internals.h	7.79 KB	-rw-r--r--	2023-12-20 12:58
buffile.h	1.67 KB	-rw-r--r--	2023-12-20 12:58
bufmgr.h	7.2 KB	-rw-r--r--	2023-12-20 12:58
bufpage.h	12.91 KB	-rw-r--r--	2023-12-20 12:58
copydir.h	561 B	-rw-r--r--	2023-12-20 12:58
fd.h	3.56 KB	-rw-r--r--	2023-12-20 12:58
freespace.h	1.23 KB	-rw-r--r--	2023-12-20 12:58
fsm_internals.h	2.24 KB	-rw-r--r--	2023-12-20 12:58
indexfsm.h	795 B	-rw-r--r--	2023-12-20 12:58
ipc.h	2.54 KB	-rw-r--r--	2023-12-20 12:58
item.h	469 B	-rw-r--r--	2023-12-20 12:58
itemid.h	4.24 KB	-rw-r--r--	2023-12-20 12:58
itemptr.h	3.72 KB	-rw-r--r--	2023-12-20 12:58
large_object.h	2.89 KB	-rw-r--r--	2023-12-20 12:58
latch.h	5.28 KB	-rw-r--r--	2023-12-20 12:58
lmgr.h	3.22 KB	-rw-r--r--	2023-12-20 12:58
lock.h	21.16 KB	-rw-r--r--	2023-12-20 12:58
lwlock.h	3.58 KB	-rw-r--r--	2023-12-20 12:58
off.h	1.58 KB	-rw-r--r--	2023-12-20 12:58
pg_sema.h	2.41 KB	-rw-r--r--	2023-12-20 12:58
pg_shmem.h	1.95 KB	-rw-r--r--	2023-12-20 12:58
pmsignal.h	2.03 KB	-rw-r--r--	2023-12-20 12:58
pos.h	1.56 KB	-rw-r--r--	2023-12-20 12:58
predicate.h	2.56 KB	-rw-r--r--	2023-12-20 12:58
predicate_internals.h	16.98 KB	-rw-r--r--	2023-12-20 12:58
proc.h	9.58 KB	-rw-r--r--	2023-12-20 12:58
procarray.h	2.96 KB	-rw-r--r--	2023-12-20 12:58
procsignal.h	1.76 KB	-rw-r--r--	2023-12-20 12:58
reinit.h	588 B	-rw-r--r--	2023-12-20 12:58
relfilenode.h	4.31 KB	-rw-r--r--	2023-12-20 12:58
s_lock.h	28 KB	-rw-r--r--	2023-12-20 12:58
shmem.h	2.63 KB	-rw-r--r--	2023-12-20 12:58
sinval.h	4.97 KB	-rw-r--r--	2023-12-20 12:58
sinvaladt.h	1.49 KB	-rw-r--r--	2023-12-20 12:58
smgr.h	5.67 KB	-rw-r--r--	2023-12-20 12:58
spin.h	2.71 KB	-rw-r--r--	2023-12-20 12:58
standby.h	3.97 KB	-rw-r--r--	2023-12-20 12:58

Rename

/*-------------------------------------------------------------------------
 *
 * fsm_internal.h
 *	  internal functions for free space map
 *
 *
 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/storage/fsm_internals.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef FSM_INTERNALS_H
#define FSM_INTERNALS_H

#include "storage/buf.h"
#include "storage/bufpage.h"

/*
 * Structure of a FSM page. See src/backend/storage/freespace/README for
 * details.
 */
typedef struct
{
	/*
	 * fsm_search_avail() tries to spread the load of multiple backends by
	 * returning different pages to different backends in a round-robin
	 * fashion. fp_next_slot points to the next slot to be returned (assuming
	 * there's enough space on it for the request). It's defined as an int,
	 * because it's updated without an exclusive lock. uint16 would be more
	 * appropriate, but int is more likely to be atomically
	 * fetchable/storable.
	 */
	int			fp_next_slot;

/*
	 * fp_nodes contains the binary tree, stored in array. The first
	 * NonLeafNodesPerPage elements are upper nodes, and the following
	 * LeafNodesPerPage elements are leaf nodes. Unused nodes are zero.
	 */
	uint8		fp_nodes[1];
} FSMPageData;

typedef FSMPageData *FSMPage;

/*
 * Number of non-leaf and leaf nodes, and nodes in total, on an FSM page.
 * These definitions are internal to fsmpage.c.
 */
#define NodesPerPage (BLCKSZ - MAXALIGN(SizeOfPageHeaderData) - \
					  offsetof(FSMPageData, fp_nodes))

#define NonLeafNodesPerPage (BLCKSZ / 2 - 1)
#define LeafNodesPerPage (NodesPerPage - NonLeafNodesPerPage)

/*
 * Number of FSM "slots" on a FSM page. This is what should be used
 * outside fsmpage.c.
 */
#define SlotsPerFSMPage LeafNodesPerPage

/* Prototypes for functions in fsmpage.c */
extern int fsm_search_avail(Buffer buf, uint8 min_cat, bool advancenext,
				 bool exclusive_lock_held);
extern uint8 fsm_get_avail(Page page, int slot);
extern uint8 fsm_get_max_avail(Page page);
extern bool fsm_set_avail(Page page, int slot, uint8 value);
extern bool fsm_truncate_avail(Page page, int nslots);
extern bool fsm_rebuild_page(Page page);

#endif   /* FSM_INTERNALS_H */