Split off functions related to timeline history files and XLOG archiving.

This is just refactoring, to make the functions accessible outside xlog.c.
A followup patch will make use of that, to allow fetching timeline history
files over streaming replication.

2 files changed, 46 insertions, 0 deletions

diff --git a/src/include/access/timeline.h b/src/include/access/timeline.h
new file mode 100644
index 00000000000..f2a7658bc45
--- /dev/null
+++ b/src/include/access/timeline.h
@@ -0,0 +1,23 @@
+/*
+ * timeline.h
+ *
+ * Functions for reading and writing timeline history files.
+ *
+ * Portions Copyright (c) 1996-2012, 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"
+
+extern List *readTimeLineHistory(TimeLineID targetTLI);
+extern bool existsTimeLineHistory(TimeLineID probeTLI);
+extern TimeLineID findNewestTimeLine(TimeLineID startTLI);
+extern void writeTimeLineHistory(TimeLineID newTLI, TimeLineID parentTLI,
+					 TimeLineID endTLI, XLogSegNo endLogSegNo, char *reason);
+
+#endif   /* TIMELINE_H */
diff --git a/src/include/access/xlog_internal.h b/src/include/access/xlog_internal.h
index b5bfb7b4072..2c66b2feb8a 100644
--- a/src/include/access/xlog_internal.h
+++ b/src/include/access/xlog_internal.h
@@ -229,6 +229,29 @@ extern const RmgrData RmgrTable[];
 extern pg_time_t GetLastSegSwitchTime(void);
 extern XLogRecPtr RequestXLogSwitch(void);
 
+extern void GetOldestRestartPoint(XLogRecPtr *oldrecptr, TimeLineID *oldtli);
+
+/*
+ * Exported for the functions in timeline.c and xlogarchive.c.  Only valid
+ * in the startup process.
+ */
+extern bool InArchiveRecovery;
+extern bool StandbyMode;
+extern char *recoveryRestoreCommand;
+
+/*
+ * Prototypes for functions in xlogarchive.c
+ */
+extern bool RestoreArchivedFile(char *path, const char *xlogfname,
+					const char *recovername, off_t expectedSize);
+extern void ExecuteRecoveryCommand(char *command, char *commandName,
+					   bool failOnerror);
+extern void XLogArchiveNotify(const char *xlog);
+extern void XLogArchiveNotifySeg(XLogSegNo segno);
+extern bool XLogArchiveCheckDone(const char *xlog);
+extern bool XLogArchiveIsBusy(const char *xlog);
+extern void XLogArchiveCleanup(const char *xlog);
+
 /*
  * These aren't in xlog.h because I'd rather not include fmgr.h there.
  */