60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/*-------------------------------------------------------------------------
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*
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* walsender.h
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* Exports from replication/walsender.c.
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*
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* Portions Copyright (c) 2010-2011, PostgreSQL Global Development Group
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*
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* src/include/replication/walsender.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef _WALSENDER_H
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#define _WALSENDER_H
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#include "access/xlog.h"
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#include "storage/latch.h"
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#include "storage/spin.h"
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/*
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* Each walsender has a WalSnd struct in shared memory.
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*/
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typedef struct WalSnd
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{
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pid_t pid; /* this walsender's process id, or 0 */
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XLogRecPtr sentPtr; /* WAL has been sent up to this point */
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slock_t mutex; /* locks shared variables shown above */
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/*
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* Latch used by backends to wake up this walsender when it has work
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* to do.
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*/
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Latch latch;
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} WalSnd;
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/* There is one WalSndCtl struct for the whole database cluster */
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typedef struct
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{
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WalSnd walsnds[1]; /* VARIABLE LENGTH ARRAY */
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} WalSndCtlData;
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extern WalSndCtlData *WalSndCtl;
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/* global state */
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extern bool am_walsender;
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/* user-settable parameters */
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extern int WalSndDelay;
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extern int max_wal_senders;
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extern int WalSenderMain(void);
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extern void WalSndSignals(void);
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extern Size WalSndShmemSize(void);
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extern void WalSndShmemInit(void);
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extern void WalSndWakeup(void);
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extern Datum pg_stat_get_wal_senders(PG_FUNCTION_ARGS);
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#endif /* _WALSENDER_H */
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