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/*-------------------------------------------------------------------------
*
* syncrep.h
* Exports from replication/syncrep.c.
*
* Portions Copyright (c) 2010-2016, PostgreSQL Global Development Group
*
* IDENTIFICATION
* src/include/replication/syncrep.h
*
*-------------------------------------------------------------------------
*/
#ifndef _SYNCREP_H
#define _SYNCREP_H
#include "access/xlogdefs.h"
#include "utils/guc.h"
#define SyncRepRequested() \
(max_wal_senders > 0 && synchronous_commit > SYNCHRONOUS_COMMIT_LOCAL_FLUSH)
/* SyncRepWaitMode */
#define SYNC_REP_NO_WAIT -1
#define SYNC_REP_WAIT_WRITE 0
#define SYNC_REP_WAIT_FLUSH 1
#define SYNC_REP_WAIT_APPLY 2
#define NUM_SYNC_REP_WAIT_MODE 3
/* syncRepState */
#define SYNC_REP_NOT_WAITING 0
#define SYNC_REP_WAITING 1
#define SYNC_REP_WAIT_COMPLETE 2
/*
* Struct for the configuration of synchronous replication.
*/
typedef struct SyncRepConfigData
{
int num_sync; /* number of sync standbys that we need to wait for */
List *members; /* list of names of potential sync standbys */
} SyncRepConfigData;
extern SyncRepConfigData *syncrep_parse_result;
extern SyncRepConfigData *SyncRepConfig;
/* user-settable parameters for synchronous replication */
extern char *SyncRepStandbyNames;
/* called by user backend */
extern void SyncRepWaitForLSN(XLogRecPtr lsn, bool commit);
/* called at backend exit */
extern void SyncRepCleanupAtProcExit(void);
/* called by wal sender */
extern void SyncRepInitConfig(void);
extern void SyncRepReleaseWaiters(void);
/* called by wal sender and user backend */
extern List *SyncRepGetSyncStandbys(bool *am_sync);
extern void SyncRepUpdateConfig(void);
extern void SyncRepFreeConfig(SyncRepConfigData *config);
/* called by checkpointer */
extern void SyncRepUpdateSyncStandbysDefined(void);
extern bool check_synchronous_standby_names(char **newval, void **extra, GucSource source);
extern void assign_synchronous_commit(int newval, void *extra);
/*
* Internal functions for parsing synchronous_standby_names grammar,
* in syncrep_gram.y and syncrep_scanner.l
*/
extern int syncrep_yyparse(void);
extern int syncrep_yylex(void);
extern void syncrep_yyerror(const char *str);
extern void syncrep_scanner_init(const char *query_string);
extern void syncrep_scanner_finish(void);
#endif /* _SYNCREP_H */
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