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📄 amapi.h(6.3 KB)
📄 amvalidate.h(1.19 KB)
📄 attnum.h(1.52 KB)
📄 brin.h(948 B)
📄 brin_internal.h(3.3 KB)
📄 brin_page.h(2.68 KB)
📄 brin_pageops.h(1.28 KB)
📄 brin_revmap.h(1.23 KB)
📄 brin_tuple.h(3.05 KB)
📄 brin_xlog.h(3.28 KB)
📄 clog.h(1.54 KB)
📄 commit_ts.h(2.09 KB)
📄 genam.h(7.31 KB)
📄 generic_xlog.h(1.42 KB)
📄 gin.h(2.3 KB)
📄 gin_private.h(33.12 KB)
📄 gist.h(6.51 KB)
📄 gist_private.h(19.82 KB)
📄 gistscan.h(729 B)
📄 hash.h(13.54 KB)
📄 heapam.h(7.76 KB)
📄 heapam_xlog.h(12.61 KB)
📄 hio.h(1.26 KB)
📄 htup.h(3.16 KB)
📄 htup_details.h(28.31 KB)
📄 itup.h(4.36 KB)
📄 multixact.h(5.13 KB)
📄 nbtree.h(30.22 KB)
📄 parallel.h(2.28 KB)
📄 printtup.h(1.03 KB)
📄 reloptions.h(8.88 KB)
📄 relscan.h(5.63 KB)
📄 rewriteheap.h(1.79 KB)
📄 rmgr.h(609 B)
📄 rmgrlist.h(2.97 KB)
📄 sdir.h(1.43 KB)
📄 skey.h(6.26 KB)
📄 slru.h(5.49 KB)
📄 spgist.h(7.04 KB)
📄 spgist_private.h(21.82 KB)
📄 stratnum.h(2.67 KB)
📄 subtrans.h(973 B)
📄 sysattr.h(890 B)
📄 timeline.h(1.59 KB)
📄 transam.h(6.29 KB)
📄 tsmapi.h(2.55 KB)
📄 tupconvert.h(1.4 KB)
📄 tupdesc.h(4.36 KB)
📄 tupmacs.h(7.16 KB)
📄 tuptoaster.h(7.18 KB)
📄 twophase.h(1.82 KB)
📄 twophase_rmgr.h(1.24 KB)
📄 valid.h(1.4 KB)
📄 visibilitymap.h(1.77 KB)
📄 xact.h(12.29 KB)
📄 xlog.h(10.91 KB)
📄 xlog_fn.h(1.41 KB)
📄 xlog_internal.h(10.29 KB)
📄 xlogdefs.h(3.11 KB)
📄 xloginsert.h(2.28 KB)
📄 xlogreader.h(7.11 KB)
📄 xlogrecord.h(7.76 KB)
📄 xlogutils.h(1.76 KB)

Editing: multixact.h

/*
 * multixact.h
 *
 * PostgreSQL multi-transaction-log manager
 *
 * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/access/multixact.h
 */
#ifndef MULTIXACT_H
#define MULTIXACT_H

#include "access/xlogreader.h"
#include "lib/stringinfo.h"

/*
 * The first two MultiXactId values are reserved to store the truncation Xid
 * and epoch of the first segment, so we start assigning multixact values from
 * 2.
 */
#define InvalidMultiXactId	((MultiXactId) 0)
#define FirstMultiXactId	((MultiXactId) 1)
#define MaxMultiXactId		((MultiXactId) 0xFFFFFFFF)

#define MultiXactIdIsValid(multi) ((multi) != InvalidMultiXactId)

#define MaxMultiXactOffset	((MultiXactOffset) 0xFFFFFFFF)

/* Number of SLRU buffers to use for multixact */
#define NUM_MXACTOFFSET_BUFFERS		8
#define NUM_MXACTMEMBER_BUFFERS		16

/*
 * Possible multixact lock modes ("status").  The first four modes are for
 * tuple locks (FOR KEY SHARE, FOR SHARE, FOR NO KEY UPDATE, FOR UPDATE); the
 * next two are used for update and delete modes.
 */
typedef enum
{
	MultiXactStatusForKeyShare = 0x00,
	MultiXactStatusForShare = 0x01,
	MultiXactStatusForNoKeyUpdate = 0x02,
	MultiXactStatusForUpdate = 0x03,
	/* an update that doesn't touch "key" columns */
	MultiXactStatusNoKeyUpdate = 0x04,
	/* other updates, and delete */
	MultiXactStatusUpdate = 0x05
} MultiXactStatus;

#define MaxMultiXactStatus MultiXactStatusUpdate

/* does a status value correspond to a tuple update? */
#define ISUPDATE_from_mxstatus(status) \
			((status) > MultiXactStatusForUpdate)

typedef struct MultiXactMember
{
	TransactionId xid;
	MultiXactStatus status;
} MultiXactMember;

/* ----------------
 *		multixact-related XLOG entries
 * ----------------
 */

#define XLOG_MULTIXACT_ZERO_OFF_PAGE	0x00
#define XLOG_MULTIXACT_ZERO_MEM_PAGE	0x10
#define XLOG_MULTIXACT_CREATE_ID		0x20
#define XLOG_MULTIXACT_TRUNCATE_ID		0x30

typedef struct xl_multixact_create
{
	MultiXactId mid;			/* new MultiXact's ID */
	MultiXactOffset moff;		/* its starting offset in members file */
	int32		nmembers;		/* number of member XIDs */
	MultiXactMember members[FLEXIBLE_ARRAY_MEMBER];
} xl_multixact_create;

#define SizeOfMultiXactCreate (offsetof(xl_multixact_create, members))

typedef struct xl_multixact_truncate
{
	Oid			oldestMultiDB;

/* to-be-truncated range of multixact offsets */
	MultiXactId startTruncOff;	/* just for completeness' sake */
	MultiXactId endTruncOff;

/* to-be-truncated range of multixact members */
	MultiXactOffset startTruncMemb;
	MultiXactOffset endTruncMemb;
} xl_multixact_truncate;

#define SizeOfMultiXactTruncate (sizeof(xl_multixact_truncate))

extern MultiXactId MultiXactIdCreate(TransactionId xid1,
				  MultiXactStatus status1, TransactionId xid2,
				  MultiXactStatus status2);
extern MultiXactId MultiXactIdExpand(MultiXactId multi, TransactionId xid,
				  MultiXactStatus status);
extern MultiXactId MultiXactIdCreateFromMembers(int nmembers,
							 MultiXactMember *members);

extern MultiXactId ReadNextMultiXactId(void);
extern bool MultiXactIdIsRunning(MultiXactId multi, bool isLockOnly);
extern void MultiXactIdSetOldestMember(void);
extern int GetMultiXactIdMembers(MultiXactId multi, MultiXactMember **xids,
					  bool allow_old, bool isLockOnly);
extern bool MultiXactIdPrecedes(MultiXactId multi1, MultiXactId multi2);
extern bool MultiXactIdPrecedesOrEquals(MultiXactId multi1,
							MultiXactId multi2);

extern void AtEOXact_MultiXact(void);
extern void AtPrepare_MultiXact(void);
extern void PostPrepare_MultiXact(TransactionId xid);

extern Size MultiXactShmemSize(void);
extern void MultiXactShmemInit(void);
extern void BootStrapMultiXact(void);
extern void StartupMultiXact(void);
extern void TrimMultiXact(void);
extern void ShutdownMultiXact(void);
extern void SetMultiXactIdLimit(MultiXactId oldest_datminmxid,
					Oid oldest_datoid);
extern void MultiXactGetCheckptMulti(bool is_shutdown,
						 MultiXactId *nextMulti,
						 MultiXactOffset *nextMultiOffset,
						 MultiXactId *oldestMulti,
						 Oid *oldestMultiDB);
extern void CheckPointMultiXact(void);
extern MultiXactId GetOldestMultiXactId(void);
extern void TruncateMultiXact(MultiXactId oldestMulti, Oid oldestMultiDB);
extern void MultiXactSetNextMXact(MultiXactId nextMulti,
					  MultiXactOffset nextMultiOffset);
extern void MultiXactAdvanceNextMXact(MultiXactId minMulti,
						  MultiXactOffset minMultiOffset);
extern void MultiXactAdvanceOldest(MultiXactId oldestMulti, Oid oldestMultiDB);
extern int	MultiXactMemberFreezeThreshold(void);

extern void multixact_twophase_recover(TransactionId xid, uint16 info,
						   void *recdata, uint32 len);
extern void multixact_twophase_postcommit(TransactionId xid, uint16 info,
							  void *recdata, uint32 len);
extern void multixact_twophase_postabort(TransactionId xid, uint16 info,
							 void *recdata, uint32 len);

extern void multixact_redo(XLogReaderState *record);
extern void multixact_desc(StringInfo buf, XLogReaderState *record);
extern const char *multixact_identify(uint8 info);
extern char *mxid_to_string(MultiXactId multi, int nmembers,
			   MultiXactMember *members);

#endif   /* MULTIXACT_H */

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Editing: multixact.h

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