1 files changed, 29 insertions, 0 deletions
diff --git a/src/include/utils/pg_lsn.h b/src/include/utils/pg_lsn.h
new file mode 100644
index 0000000..25d6c5b
--- /dev/null
+++ b/src/include/utils/pg_lsn.h
@@ -0,0 +1,29 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_lsn.h
+ *		Declarations for operations on log sequence numbers (LSNs) of
+ *		PostgreSQL.
+ *
+ *
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/utils/pg_lsn.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_LSN_H
+#define PG_LSN_H
+
+#include "access/xlogdefs.h"
+#include "fmgr.h"
+
+#define DatumGetLSN(X) ((XLogRecPtr) DatumGetInt64(X))
+#define LSNGetDatum(X) (Int64GetDatum((int64) (X)))
+
+#define PG_GETARG_LSN(n)	 DatumGetLSN(PG_GETARG_DATUM(n))
+#define PG_RETURN_LSN(x)	 return LSNGetDatum(x)
+
+extern XLogRecPtr pg_lsn_in_internal(const char *str, bool *have_error);
+
+#endif							/* PG_LSN_H */