1 files changed, 43 insertions, 0 deletions
diff --git a/src/include/commands/waitlsn.h b/src/include/commands/waitlsn.h
new file mode 100644
index 00000000000..10ef63f0c09
--- /dev/null
+++ b/src/include/commands/waitlsn.h
@@ -0,0 +1,43 @@
+/*-------------------------------------------------------------------------
+ *
+ * waitlsn.h
+ *	  Declarations for LSN waiting routines.
+ *
+ * Copyright (c) 2024, PostgreSQL Global Development Group
+ *
+ * src/include/commands/waitlsn.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef WAIT_LSN_H
+#define WAIT_LSN_H
+
+#include "postgres.h"
+#include "port/atomics.h"
+#include "storage/spin.h"
+#include "tcop/dest.h"
+
+/* Shared memory structures */
+typedef struct WaitLSNProcInfo
+{
+	int			procnum;
+	XLogRecPtr	waitLSN;
+} WaitLSNProcInfo;
+
+typedef struct WaitLSNState
+{
+	pg_atomic_uint64 minLSN;
+	slock_t		mutex;
+	int			numWaitedProcs;
+	WaitLSNProcInfo procInfos[FLEXIBLE_ARRAY_MEMBER];
+} WaitLSNState;
+
+extern PGDLLIMPORT struct WaitLSNState *waitLSN;
+
+extern void WaitForLSN(XLogRecPtr targetLSN, int64 timeout);
+extern Size WaitLSNShmemSize(void);
+extern void WaitLSNShmemInit(void);
+extern void WaitLSNSetLatches(XLogRecPtr currentLSN);
+extern void WaitLSNCleanup(void);
+
+#endif							/* WAIT_LSN_H */