Adding upstream version 15.4.upstream/15.4upstream

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

1 files changed, 85 insertions, 0 deletions

diff --git a/src/bin/pg_dump/parallel.h b/src/bin/pg_dump/parallel.h
new file mode 100644
index 0000000..e2f6c79
--- /dev/null
+++ b/src/bin/pg_dump/parallel.h
@@ -0,0 +1,85 @@
+/*-------------------------------------------------------------------------
+ *
+ * parallel.h
+ *
+ *	Parallel support for pg_dump and pg_restore
+ *
+ * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * IDENTIFICATION
+ *		src/bin/pg_dump/parallel.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef PG_DUMP_PARALLEL_H
+#define PG_DUMP_PARALLEL_H
+
+#include <limits.h>
+
+#include "pg_backup_archiver.h"
+
+/* Function to call in leader process on completion of a worker task */
+typedef void (*ParallelCompletionPtr) (ArchiveHandle *AH,
+									   TocEntry *te,
+									   int status,
+									   void *callback_data);
+
+/* Wait options for WaitForWorkers */
+typedef enum
+{
+	WFW_NO_WAIT,
+	WFW_GOT_STATUS,
+	WFW_ONE_IDLE,
+	WFW_ALL_IDLE
+} WFW_WaitOption;
+
+/*
+ * Maximum number of parallel jobs allowed.
+ *
+ * On Windows we can only have at most MAXIMUM_WAIT_OBJECTS (= 64 usually)
+ * parallel jobs because that's the maximum limit for the
+ * WaitForMultipleObjects() call.
+ */
+#ifdef WIN32
+#define PG_MAX_JOBS MAXIMUM_WAIT_OBJECTS
+#else
+#define PG_MAX_JOBS INT_MAX
+#endif
+
+/* ParallelSlot is an opaque struct known only within parallel.c */
+typedef struct ParallelSlot ParallelSlot;
+
+/* Overall state for parallel.c */
+typedef struct ParallelState
+{
+	int			numWorkers;		/* allowed number of workers */
+	/* these arrays have numWorkers entries, one per worker: */
+	TocEntry  **te;				/* item being worked on, or NULL */
+	ParallelSlot *parallelSlot; /* private info about each worker */
+} ParallelState;
+
+#ifdef WIN32
+extern bool parallel_init_done;
+extern DWORD mainThreadId;
+#endif
+
+extern void init_parallel_dump_utils(void);
+
+extern bool IsEveryWorkerIdle(ParallelState *pstate);
+extern void WaitForWorkers(ArchiveHandle *AH, ParallelState *pstate,
+						   WFW_WaitOption mode);
+
+extern ParallelState *ParallelBackupStart(ArchiveHandle *AH);
+extern void DispatchJobForTocEntry(ArchiveHandle *AH,
+								   ParallelState *pstate,
+								   TocEntry *te,
+								   T_Action act,
+								   ParallelCompletionPtr callback,
+								   void *callback_data);
+extern void ParallelBackupEnd(ArchiveHandle *AH, ParallelState *pstate);
+
+extern void set_archive_cancel_info(ArchiveHandle *AH, PGconn *conn);
+
+#endif							/* PG_DUMP_PARALLEL_H */