From 46651ce6fe013220ed397add242004d764fc0153 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 14:15:05 +0200 Subject: Adding upstream version 14.5. Signed-off-by: Daniel Baumann --- src/include/access/timeline.h | 44 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 src/include/access/timeline.h (limited to 'src/include/access/timeline.h') diff --git a/src/include/access/timeline.h b/src/include/access/timeline.h new file mode 100644 index 0000000..ce3586c --- /dev/null +++ b/src/include/access/timeline.h @@ -0,0 +1,44 @@ +/* + * timeline.h + * + * Functions for reading and writing timeline history files. + * + * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * src/include/access/timeline.h + */ +#ifndef TIMELINE_H +#define TIMELINE_H + +#include "access/xlogdefs.h" +#include "nodes/pg_list.h" + +/* + * A list of these structs describes the timeline history of the server. Each + * TimeLineHistoryEntry represents a piece of WAL belonging to the history, + * from newest to oldest. All WAL locations between 'begin' and 'end' belong to + * the timeline represented by the entry. Together the 'begin' and 'end' + * pointers of all the entries form a contiguous line from beginning of time + * to infinity. + */ +typedef struct +{ + TimeLineID tli; + XLogRecPtr begin; /* inclusive */ + XLogRecPtr end; /* exclusive, InvalidXLogRecPtr means infinity */ +} TimeLineHistoryEntry; + +extern List *readTimeLineHistory(TimeLineID targetTLI); +extern bool existsTimeLineHistory(TimeLineID probeTLI); +extern TimeLineID findNewestTimeLine(TimeLineID startTLI); +extern void writeTimeLineHistory(TimeLineID newTLI, TimeLineID parentTLI, + XLogRecPtr switchpoint, char *reason); +extern void writeTimeLineHistoryFile(TimeLineID tli, char *content, int size); +extern void restoreTimeLineHistoryFiles(TimeLineID begin, TimeLineID end); +extern bool tliInHistory(TimeLineID tli, List *expectedTLEs); +extern TimeLineID tliOfPointInHistory(XLogRecPtr ptr, List *history); +extern XLogRecPtr tliSwitchPoint(TimeLineID tli, List *history, + TimeLineID *nextTLI); + +#endif /* TIMELINE_H */ -- cgit v1.2.3