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/*-------------------------------------------------------------------------
*
* walsender.h
* Exports from replication/walsender.c.
*
* Portions Copyright (c) 2010-2016, PostgreSQL Global Development Group
*
* src/include/replication/walsender.h
*
*-------------------------------------------------------------------------
*/
#ifndef _WALSENDER_H
#define _WALSENDER_H
#include <signal.h>
#include "fmgr.h"
/* global state */
extern bool am_walsender;
extern bool am_cascading_walsender;
extern bool am_db_walsender;
extern bool wake_wal_senders;
/* user-settable parameters */
extern int max_wal_senders;
extern int wal_sender_timeout;
extern bool log_replication_commands;
extern void InitWalSender(void);
extern void exec_replication_command(const char *query_string);
extern void WalSndErrorCleanup(void);
extern void WalSndSignals(void);
extern Size WalSndShmemSize(void);
extern void WalSndShmemInit(void);
extern void WalSndWakeup(void);
extern void WalSndInitStopping(void);
extern void WalSndWaitStopping(void);
extern void HandleWalSndInitStopping(void);
extern void WalSndRqstFileReload(void);
extern Datum pg_stat_get_wal_senders(PG_FUNCTION_ARGS);
/*
* Remember that we want to wakeup walsenders later
*
* This is separated from doing the actual wakeup because the writeout is done
* while holding contended locks.
*/
#define WalSndWakeupRequest() \
do { wake_wal_senders = true; } while (0)
/*
* wakeup walsenders if there is work to be done
*/
#define WalSndWakeupProcessRequests() \
do \
{ \
if (wake_wal_senders) \
{ \
wake_wal_senders = false; \
if (max_wal_senders > 0) \
WalSndWakeup(); \
} \
} while (0)
#endif /* _WALSENDER_H */