1 files changed, 70 insertions, 0 deletions
diff --git a/src/include/access/xlog.h b/src/include/access/xlog.h
new file mode 100644
index 00000000000..5c8c0754246
--- /dev/null
+++ b/src/include/access/xlog.h
@@ -0,0 +1,70 @@
+/*
+ *
+ * xlog.h
+ *
+ * Postgres transaction log manager
+ *
+ */
+#ifndef XLOG_H
+#define XLOG_H
+
+#include "access/rmgr.h"
+#include "access/transam.h"
+
+typedef struct XLogRecPtr
+{
+	uint32		xlogid;		/* log file #, 0 based */
+	uint32		xrecoff;	/* offset of record in log file */
+} XLogRecPtr;
+
+typedef struct XLogRecord
+{
+	XLogRecPtr		xl_prev;		/* ptr to previous record in log */
+	XLogRecPtr		xl_xact_prev;	/* ptr to previous record of this xact */
+	TransactionId	xl_xid;			/* xact id */
+	uint16			xl_len;			/* len of record on this page */
+	uint8			xl_info;
+	RmgrId			xl_rmid;		/* resource manager inserted this record */
+
+	/* ACTUAL LOG DATA FOLLOWS AT END OF STRUCT */
+
+} XLogRecord;
+
+#define	SizeOfXLogRecord	DOUBLEALIGN(sizeof(XLogRecord))
+#define	MAXLOGRECSZ			(2 * BLCKSZ)
+/*
+ * When there is no space on current page we continue on the next
+ * page with subrecord.
+ */
+typedef struct XLogSubRecord
+{
+	uint16			xl_len;
+	uint8			xl_info;
+
+	/* ACTUAL LOG DATA FOLLOWS AT END OF STRUCT */
+
+} XLogSubRecord;
+
+#define	SizeOfXLogSubRecord	DOUBLEALIGN(sizeof(XLogSubRecord))
+
+#define	XLR_TO_BE_CONTINUED		0x01
+
+#define	XLOG_PAGE_MAGIC	0x17345168
+
+typedef struct XLogPageHeaderData
+{
+	uint32		xlp_magic;
+	uint16		xlp_info;
+} XLogPageHeaderData;
+
+#define	SizeOfXLogPHD	DOUBLEALIGN(sizeof(XLogPageHeaderData))
+
+typedef XLogPageHeaderData *XLogPageHeader;
+
+#define	XLP_FIRST_IS_SUBRECORD	0x0001
+
+extern XLogRecPtr		XLogInsert(RmgrId rmid, char *hdr, uint32 hdrlen, 
+									char *buf, uint32 buflen);
+extern void				XLogFlush(XLogRecPtr RecPtr);
+
+#endif	/* XLOG_H */