1 files changed, 13 insertions, 0 deletions
diff --git a/src/bin/pg_dump/parallel.h b/src/bin/pg_dump/parallel.h
index 0fbf736c811..0b39285a015 100644
--- a/src/bin/pg_dump/parallel.h
+++ b/src/bin/pg_dump/parallel.h
@@ -33,6 +33,19 @@ typedef enum
 	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;