76 lines
1.8 KiB
C
76 lines
1.8 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) 2010-2018, 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 <signal.h>
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#include "fmgr.h"
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/*
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* What to do with a snapshot in create replication slot command.
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*/
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typedef enum
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{
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CRS_EXPORT_SNAPSHOT,
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CRS_NOEXPORT_SNAPSHOT,
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CRS_USE_SNAPSHOT
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} CRSSnapshotAction;
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/* global state */
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extern bool am_walsender;
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extern bool am_cascading_walsender;
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extern bool am_db_walsender;
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extern bool wake_wal_senders;
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/* user-settable parameters */
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extern int max_wal_senders;
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extern int wal_sender_timeout;
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extern bool log_replication_commands;
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extern void InitWalSender(void);
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extern bool exec_replication_command(const char *query_string);
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extern void WalSndErrorCleanup(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 void WalSndInitStopping(void);
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extern void WalSndWaitStopping(void);
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extern void HandleWalSndInitStopping(void);
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extern void WalSndRqstFileReload(void);
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/*
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* Remember that we want to wakeup walsenders later
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*
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* This is separated from doing the actual wakeup because the writeout is done
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* while holding contended locks.
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*/
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#define WalSndWakeupRequest() \
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do { wake_wal_senders = true; } while (0)
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/*
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* wakeup walsenders if there is work to be done
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*/
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#define WalSndWakeupProcessRequests() \
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do \
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{ \
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if (wake_wal_senders) \
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{ \
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wake_wal_senders = false; \
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if (max_wal_senders > 0) \
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WalSndWakeup(); \
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} \
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} while (0)
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#endif /* _WALSENDER_H */
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