postgresql/src/include/access/clog.h
Tom Lane 382ceffdf7 Phase 3 of pgindent updates.
Don't move parenthesized lines to the left, even if that means they
flow past the right margin.

By default, BSD indent lines up statement continuation lines that are
within parentheses so that they start just to the right of the preceding
left parenthesis.  However, traditionally, if that resulted in the
continuation line extending to the right of the desired right margin,
then indent would push it left just far enough to not overrun the margin,
if it could do so without making the continuation line start to the left of
the current statement indent.  That makes for a weird mix of indentations
unless one has been completely rigid about never violating the 80-column
limit.

This behavior has been pretty universally panned by Postgres developers.
Hence, disable it with indent's new -lpl switch, so that parenthesized
lines are always lined up with the preceding left paren.

This patch is much less interesting than the first round of indent
changes, but also bulkier, so I thought it best to separate the effects.

Discussion: https://postgr.es/m/E1dAmxK-0006EE-1r@gemulon.postgresql.org
Discussion: https://postgr.es/m/30527.1495162840@sss.pgh.pa.us
2017-06-21 15:35:54 -04:00

61 lines
1.7 KiB
C

/*
* clog.h
*
* PostgreSQL transaction-commit-log manager
*
* Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/access/clog.h
*/
#ifndef CLOG_H
#define CLOG_H
#include "access/xlogreader.h"
#include "lib/stringinfo.h"
/*
* Possible transaction statuses --- note that all-zeroes is the initial
* state.
*
* A "subcommitted" transaction is a committed subtransaction whose parent
* hasn't committed or aborted yet.
*/
typedef int XidStatus;
#define TRANSACTION_STATUS_IN_PROGRESS 0x00
#define TRANSACTION_STATUS_COMMITTED 0x01
#define TRANSACTION_STATUS_ABORTED 0x02
#define TRANSACTION_STATUS_SUB_COMMITTED 0x03
typedef struct xl_clog_truncate
{
int pageno;
TransactionId oldestXact;
Oid oldestXactDb;
} xl_clog_truncate;
extern void TransactionIdSetTreeStatus(TransactionId xid, int nsubxids,
TransactionId *subxids, XidStatus status, XLogRecPtr lsn);
extern XidStatus TransactionIdGetStatus(TransactionId xid, XLogRecPtr *lsn);
extern Size CLOGShmemBuffers(void);
extern Size CLOGShmemSize(void);
extern void CLOGShmemInit(void);
extern void BootStrapCLOG(void);
extern void StartupCLOG(void);
extern void TrimCLOG(void);
extern void ShutdownCLOG(void);
extern void CheckPointCLOG(void);
extern void ExtendCLOG(TransactionId newestXact);
extern void TruncateCLOG(TransactionId oldestXact, Oid oldestxid_datoid);
/* XLOG stuff */
#define CLOG_ZEROPAGE 0x00
#define CLOG_TRUNCATE 0x10
extern void clog_redo(XLogReaderState *record);
extern void clog_desc(StringInfo buf, XLogReaderState *record);
extern const char *clog_identify(uint8 info);
#endif /* CLOG_H */