Adding upstream version 15.4.upstream/15.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/src/include/access/xlogprefetcher.h b/src/include/access/xlogprefetcher.h
new file mode 100644
index 0000000..fdd67fc
--- /dev/null
+++ b/src/include/access/xlogprefetcher.h
@@ -0,0 +1,55 @@
+/*-------------------------------------------------------------------------
+ *
+ * xlogprefetcher.h
+ *		Declarations for the recovery prefetching module.
+ *
+ * Portions Copyright (c) 2022, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * IDENTIFICATION
+ *		src/include/access/xlogprefetcher.h
+ *-------------------------------------------------------------------------
+ */
+#ifndef XLOGPREFETCHER_H
+#define XLOGPREFETCHER_H
+
+#include "access/xlogdefs.h"
+#include "access/xlogreader.h"
+#include "access/xlogrecord.h"
+
+/* GUCs */
+extern PGDLLIMPORT int recovery_prefetch;
+
+/* Possible values for recovery_prefetch */
+typedef enum
+{
+	RECOVERY_PREFETCH_OFF,
+	RECOVERY_PREFETCH_ON,
+	RECOVERY_PREFETCH_TRY
+}			RecoveryPrefetchValue;
+
+struct XLogPrefetcher;
+typedef struct XLogPrefetcher XLogPrefetcher;
+
+
+extern void XLogPrefetchReconfigure(void);
+
+extern size_t XLogPrefetchShmemSize(void);
+extern void XLogPrefetchShmemInit(void);
+
+extern void XLogPrefetchResetStats(void);
+
+extern XLogPrefetcher *XLogPrefetcherAllocate(XLogReaderState *reader);
+extern void XLogPrefetcherFree(XLogPrefetcher *prefetcher);
+
+extern XLogReaderState *XLogPrefetcherGetReader(XLogPrefetcher *prefetcher);
+
+extern void XLogPrefetcherBeginRead(XLogPrefetcher *prefetcher,
+									XLogRecPtr recPtr);
+
+extern XLogRecord *XLogPrefetcherReadRecord(XLogPrefetcher *prefetcher,
+											char **errmsg);
+
+extern void XLogPrefetcherComputeStats(XLogPrefetcher *prefetcher);
+
+#endif