Gecko [ www.finalhopeacademy.com ]

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

Code Editor : standby.h

/*-------------------------------------------------------------------------
 *
 * standby.h
 *	  Definitions for hot standby mode.
 *
 *
 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/storage/standby.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef STANDBY_H
#define STANDBY_H

#include "access/xlog.h"
#include "storage/lock.h"
#include "storage/procsignal.h"
#include "storage/relfilenode.h"

/* User-settable GUC parameters */
extern int	vacuum_defer_cleanup_age;
extern int	max_standby_archive_delay;
extern int	max_standby_streaming_delay;

extern void InitRecoveryTransactionEnvironment(void);
extern void ShutdownRecoveryTransactionEnvironment(void);

extern void ResolveRecoveryConflictWithSnapshot(TransactionId latestRemovedXid,
									RelFileNode node);
extern void ResolveRecoveryConflictWithTablespace(Oid tsid);
extern void ResolveRecoveryConflictWithDatabase(Oid dbid);

extern void ResolveRecoveryConflictWithBufferPin(void);
extern void SendRecoveryConflictWithBufferPin(ProcSignalReason reason);
extern void CheckRecoveryConflictDeadlock(void);

/*
 * Standby Rmgr (RM_STANDBY_ID)
 *
 * Standby recovery manager exists to perform actions that are required
 * to make hot standby work. That includes logging AccessExclusiveLocks taken
 * by transactions and running-xacts snapshots.
 */
extern void StandbyAcquireAccessExclusiveLock(TransactionId xid, Oid dbOid, Oid relOid);
extern void StandbyReleaseLockTree(TransactionId xid,
					   int nsubxids, TransactionId *subxids);
extern void StandbyReleaseAllLocks(void);
extern void StandbyReleaseOldLocks(int nxids, TransactionId *xids);

/*
 * XLOG message types
 */
#define XLOG_STANDBY_LOCK			0x00
#define XLOG_RUNNING_XACTS			0x10

typedef struct xl_standby_locks
{
	int			nlocks;			/* number of entries in locks array */
	xl_standby_lock locks[1];	/* VARIABLE LENGTH ARRAY */
} xl_standby_locks;

/*
 * When we write running xact data to WAL, we use this structure.
 */
typedef struct xl_running_xacts
{
	int			xcnt;			/* # of xact ids in xids[] */
	bool		subxid_overflow;	/* snapshot overflowed, subxids missing */
	TransactionId nextXid;		/* copy of ShmemVariableCache->nextXid */
	TransactionId oldestRunningXid;		/* *not* oldestXmin */
	TransactionId latestCompletedXid;	/* so we can set xmax */

TransactionId xids[1];		/* VARIABLE LENGTH ARRAY */
} xl_running_xacts;

#define MinSizeOfXactRunningXacts offsetof(xl_running_xacts, xids)

/* Recovery handlers for the Standby Rmgr (RM_STANDBY_ID) */
extern void standby_redo(XLogRecPtr lsn, XLogRecord *record);
extern void standby_desc(StringInfo buf, uint8 xl_info, char *rec);

/*
 * Declarations for GetRunningTransactionData(). Similar to Snapshots, but
 * not quite. This has nothing at all to do with visibility on this server,
 * so this is completely separate from snapmgr.c and snapmgr.h.
 * This data is important for creating the initial snapshot state on a
 * standby server. We need lots more information than a normal snapshot,
 * hence we use a specific data structure for our needs. This data
 * is written to WAL as a separate record immediately after each
 * checkpoint. That means that wherever we start a standby from we will
 * almost immediately see the data we need to begin executing queries.
 */

typedef struct RunningTransactionsData
{
	int			xcnt;			/* # of xact ids in xids[] */
	bool		subxid_overflow;	/* snapshot overflowed, subxids missing */
	TransactionId nextXid;		/* copy of ShmemVariableCache->nextXid */
	TransactionId oldestRunningXid;		/* *not* oldestXmin */
	TransactionId latestCompletedXid;	/* so we can set xmax */

TransactionId *xids;		/* array of (sub)xids still running */
} RunningTransactionsData;

typedef RunningTransactionsData *RunningTransactions;

extern void LogAccessExclusiveLock(Oid dbOid, Oid relOid);
extern void LogAccessExclusiveLockPrepare(void);

extern void LogStandbySnapshot(void);

#endif   /* STANDBY_H */

${this.title}

Code Editor : standby.h